Chandra X-Ray Observatory
	(CXC)

Accepted Cycle 10 Observing Proposals

ACTIVE GALAXIES AND QUASARS BH AND NS BINARIES CLUSTERS OF GALAXIES EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS GALACTIC DIFFUSE EMISSION AND SURVEYS NORMAL GALAXIES SN, SNR AND ISOLATED NS SOLAR SYSTEM STARS AND WD WD BINARIES AND CV
Proposal Number Subject Category PI Name Title
10200053 STARS AND WD Claude Canizares Summing Flares from EV Lac
10200070 STARS AND WD Gordon Garmire Revealing the Origin of Hard X-rays in the Remarkable O4-O4 Binary Star System in M17: GTO component
10200077 STARS AND WD Gordon Garmire G29.96-0.02: The enigma of ultra-compact HII regions
10200079 STARS AND WD Gordon Garmire Search for triggered star formation in the type A bright rimmed cloud 34
10200110 STARS AND WD Beate Stelzer Search for X-ray emission from magnetic chemically peculiar roAp stars
10200113 STARS AND WD Manuel Guedel Imaging X-Ray Microjets from T Tauri Stars
10200170 STARS AND WD Leisa Townsley G333.6-0.2: An Embedded Giant HII Region in a Proto-OB Association
10200216 STARS AND WD J rgen Schmitt X-ray emission from the magnetic star alpha ^2 Canum Venaticorum ?
10200260 STARS AND WD Giuseppina Micela Activity and Rotation in the Zero Age Main Sequence cluster h Per
10200267 STARS AND WD Stephen Skinner Berkeley 87: A Young Cluster Embedded in a Supersonic Wolf-Rayet Wind
10200270 STARS AND WD Stephen Skinner Unusual X-ray Emission from the Rapidly Accreting Young Star FU Orionis
10200277 STARS AND WD David Weintraub ToO Studies with CXO of Pre-Main Sequence Stars Undergoing Optical Outbursts
10200283 STARS AND WD Hans Guenther IM Lup comes to age: A turnover from accretion to coronae?
10200304 STARS AND WD Thomas Ayres The Cycles of Alpha Centauri
10200353 STARS AND WD Wayne Waldron Using a Cool B Supergiant to Probe the Deepest X-Ray Emitting Layers of a Dense Stellar Wind
10200414 STARS AND WD Andrew Pollock Collisionless plasma dynamics in WR140 near the 2009 eclipse and periastron
10200468 STARS AND WD Rachel Osten Exploring the Stable Coronae of LP349-25 through X-ray and Radio Emission
10200496 STARS AND WD david huenemoerder Anomalous Adara: The Spatial and Spectral Properties of Extended X-Ray Emission
10200509 STARS AND WD Svetozar Zhekov Testing the Colliding Wind Paradigm: X-rays from the Wolf-Rayet Binary System WR 147
10200574 STARS AND WD Ettore Flaccomio V2129 Oph: a close look at a CTTS
10200596 STARS AND WD Alexander Brown X-RAY AND FUV PHOTO-IONIZATION/-EXCITATION OF TRANSITIONAL DISKS AROUND THE PMS STARS HD135344B and Lk Halpha 330
10200618 STARS AND WD Michael Corcoran Testing Shock Dynamics in Eta Carinae with HETGS After the 2009 Periastron Passage
10200738 STARS AND WD Thomas Allen Evolution of Young Stars in the Large Massive Cluster Cep OB3b
10200757 STARS AND WD Jose Torrejon The true nature of HD 110432: the most extreme gamma Cas analog
10200787 STARS AND WD Marc Gagne The Origin of Hard X-rays in M17's Remarkable O4-O4 Binary
10200804 STARS AND WD Gregory Herczeg Constraining the Effects of High Energy Photons on Proto-Planetary Disk Chemistry and Evolution
10200840 STARS AND WD Alexander Brown CORONAL AND TRANSITION REGION HEATING DUE TO MAGNETIC ACTIVITY ON METAL-POOR DWARF STARS
10200900 STARS AND WD Young YU Direct X-ray measurements of the expansion of planetary nebulae
10200901 STARS AND WD Kenji Hamaguchi X-ray Monitoring of Eta Car in 2009: Unveiling the Deep X-ray Minimum
10200921 STARS AND WD CXC Calibration AO-10 Calibration Observations to Monitor the Spatial Variations in the HRC-I Gain
10200922 STARS AND WD CXC Calibration AO-10 Calibration Observations of Capella
10200923 STARS AND WD CXC Calibration AO-10 Calibration Observations to Monitor the Spatial Variations in the HRC-S Gain
10200926 STARS AND WD CXC Calibration AO-10 Calibration Observations of HZ43
10200930 STARS AND WD CXC Calibration AO-10 Measurements of the optical/UV Transmission of the HRC Filters.
10300001 WD BINARIES AND CV Wolfgang Pietsch Resolving short supersoft source states of optical novae in the core of M31
10300026 WD BINARIES AND CV Peter Predehl Resolving short supersoft source states of optical novae in the core of M31
10300323 WD BINARIES AND CV David Pooley Chandra Observation of a New Galactic Globular Cluster -- FSR 584
10300356 WD BINARIES AND CV Marina Orio CP Puppis, a template for the secular evolution of novae
10300452 WD BINARIES AND CV Jennifer Sokoloski RS Ophiuchi: First X-ray Jet from a Nova
10300531 WD BINARIES AND CV Thomas Nelson Grating spectroscopy of a bright nova in outburst
10300566 WD BINARIES AND CV Koji Mukai The Nature of the Soft Component in the Symbiotic Star CH Cygni
10300586 WD BINARIES AND CV Orsola De Marco PlaN-B: The hyperactive coronae of interacting companions in planetary nebulae
10300600 WD BINARIES AND CV Andrea Dieball Uncovering the interacting binary population in NGC 6681
10300704 WD BINARIES AND CV David Pooley Understanding the Current Dynamical States of Globular Clusters
10300769 WD BINARIES AND CV Craig Heinke Searching for Millisecond Pulsars in Extremely Low-Mass White Dwarf Binaries
10400006 BH AND NS BINARIES Hua Feng Weighing the ULX in M82 via QPO-Spectral Correlations from Simultaneous Chandra and XMM-Newton Observations
10400008 BH AND NS BINARIES Adamantia Paizis INVESTIGATING NEW INTEGRAL SOURCES WITH CHANDRA
10400009 BH AND NS BINARIES Jon Miller High Resolution Spectroscopy of a Black Hole Transient
10400046 BH AND NS BINARIES Jelle Kaastra Chandra follow-up of weak persistent sources found in INTEGRAL maps
10400048 BH AND NS BINARIES Jelle Kaastra Chandra follow-up of weak persistent sources
10400049 BH AND NS BINARIES Jelle Kaastra Chandra LETG observation of an ultra-compact X-ray binary candidate
10400067 BH AND NS BINARIES Claude Canizares Observe Z sources at High Mass Accretion Rates
10400071 BH AND NS BINARIES Claude Canizares Chandra Observations of the Low Mass X-ray Binary 4U 1556-60
10400163 BH AND NS BINARIES Stephane Corbel X-Ray Jets in Microquasars
10400165 BH AND NS BINARIES David Pooley Transient LMXBs in Globular Clusters: More Numerous Than We Thought?
10400218 BH AND NS BINARIES Paolo Soleri ToO observations of the microquasar GRS 1915+105 in quiescence
10400234 BH AND NS BINARIES Deepto Chakrabarty Precise Localization of Neutron Star Soft X-Ray Transients
10400238 BH AND NS BINARIES Isabelle Grenier ToO observation of a bright Galactic transient discovered by GLAST and Swift
10400252 BH AND NS BINARIES EDWARD CACKETT Chandra observations of newly discovered, nearby, globular clusters in the Galaxy
10400273 BH AND NS BINARIES Tod Strohmayer Understanding the nature of high inclination low mass X-ray binaries: broad-band and line spectra from A1744-361
10400329 BH AND NS BINARIES EDWARD CACKETT Crustal cooling in the neutron star KS 1731-260
10400350 BH AND NS BINARIES Feryal Ozel X-ray Column Density Towards The Low Mass X-ray Binary 4U 1608-522
10400384 BH AND NS BINARIES Peter Jonker Following a black hole candidate X-ray transient to quiescence
10400393 BH AND NS BINARIES Nanda Rea Looking at the quiescence of the unique system GRB 070610/Swift J195509.6+261406
10400405 BH AND NS BINARIES Nathalie Degenaar Crust cooling of bright neutron star transients with long recurrence times
10400425 BH AND NS BINARIES Duncan Galloway Photospheric radius-expansion bursts at high spectral resolution
10400447 BH AND NS BINARIES Nathalie Degenaar Crust Cooling of HETE J1900.1-2455 and Swift J1626.6-5156
10400448 BH AND NS BINARIES Laurence Boirin Bright edge-on LMXB transients to map ionized disk atmospheres
10400459 BH AND NS BINARIES Nanda Rea Deep search for the pulsars powering the TeV emission of LS I 61+303 and LS 5039
10400463 BH AND NS BINARIES Laurens Keek Taking the temperature of the superburster 4U 1608-522 after an outburst
10400480 BH AND NS BINARIES Rudy Wijnands Quasi-persistent neutron-star X-ray binaries in quiescence
10400502 BH AND NS BINARIES Dirk Pandel ToO Observations of New Galactic Gamma-ray Transients Discovered with GLAST
10400562 BH AND NS BINARIES Mikhail Revnivtsev Precise Chandra position determinations of compact binary candidates-faint persistent INTEGRAL sources in the bulge
10400572 BH AND NS BINARIES Craig Heinke Variability in Quiescent Neutron Star Binaries in Dense Globular Clusters
10400588 BH AND NS BINARIES Deepto Chakrabarty Validating Neutron Star Radius Measurements
10400599 BH AND NS BINARIES Omar Tibolla The brightest unidentified Galactic sources of the new H.E.S.S. survey
10400649 BH AND NS BINARIES Peter Jonker Completing the Galactic Bulge Survey: categorising the plethora of faint X-ray sources in the Galactic Bulge
10400745 BH AND NS BINARIES Sebastian Heinz Hot on the Trail of Circinus X-1: The first X-ray jet from an accreting neutron star
10400827 BH AND NS BINARIES Jeroen Homan The cooling neutron star in the super-Eddington accretor XTE J1701-462
10400907 BH AND NS BINARIES Gordon Garmire Extended emission of microquasar LS 5039
10500002 SN, SNR AND ISOLATED NS Jules Halpern Measuring the Magnetic Fields of Central Compact Objects in Supernova Remnants
10500017 SN, SNR AND ISOLATED NS Stephen Murray Chandra Observation of the Southeast Rim of G347.3-0.5
10500031 SN, SNR AND ISOLATED NS Stephen Murray Search for a Period in the Cas-A CCO
10500032 SN, SNR AND ISOLATED NS Jelle Kaastra Obtaining spatial and spectral information of a point source in RCW 86
10500047 SN, SNR AND ISOLATED NS Jelle Kaastra Monitoring the spectral evolution of RXJ0720-3125 and determining its nature
10500050 SN, SNR AND ISOLATED NS Peter Predehl Observation of the central compact Object in RX J0852.0-4622
10500065 SN, SNR AND ISOLATED NS Claude Canizares 2nd Epoch High Resolution Spectra of Cassiopeia A: Plasma Evolution and Doppler Mapping
10500072 SN, SNR AND ISOLATED NS Gordon Garmire Galactic Supernova Remnant G340.6+0.3
10500078 SN, SNR AND ISOLATED NS Gordon Garmire Long GRB Jet Breaks
10500093 SN, SNR AND ISOLATED NS Gordon Garmire Snap-shot survey of compact, radio-bright SNRs
10500237 SN, SNR AND ISOLATED NS Patrick Slane Rediscovering the Young Ejecta-Dominated Supernova Remnant G350.1-0.3
10500274 SN, SNR AND ISOLATED NS Kevin Hurley Chandra/Spitzer ToO Observations of a short-duration gamma-ray burst
10500295 SN, SNR AND ISOLATED NS Vyacheslav Zavlin Are all black widows alike?
10500298 SN, SNR AND ISOLATED NS Chryssa Kouveliotou ToO Observations of Soft Gamma Repeaters
10500327 SN, SNR AND ISOLATED NS Stephen Reynolds An Extensive Study of the Youngest Galactic Supernova Remnant G1.9+0.3
10500344 SN, SNR AND ISOLATED NS Jules Halpern New Pulsar Identifications of TeV Gamma-ray Sources
10500347 SN, SNR AND ISOLATED NS Eran Ofek Searching for extragalactic soft gamma-ray repeaters
10500400 SN, SNR AND ISOLATED NS Edo Berger Rapid Observations of Short Gamma-Ray Bursts: Accurate Positions Hold the Key to the Progenitor Population
10500426 SN, SNR AND ISOLATED NS Duncan Lorimer PSRJ1832+0029: a unique target for pulsar emission physics
10500434 SN, SNR AND ISOLATED NS David Pooley Chandra Observations of New X-ray Supernovae
10500437 SN, SNR AND ISOLATED NS Deepto Chakrabarty The Spin and Magnetic Moment of the Neutron Star in Cassiopeia A
10500440 SN, SNR AND ISOLATED NS George Pavlov Imaging the binary plerion
10500481 SN, SNR AND ISOLATED NS Gian Luca Israel Prompt Study of Burst-Selected Outbursts from AXPs
10500491 SN, SNR AND ISOLATED NS Alicia Soderberg An In-Depth Study of the Nearest Gamma-Ray Bursts
10500533 SN, SNR AND ISOLATED NS SANGWOOK PARK A Deep Chandra Observation of Supernova Remnant N49 in the LMC
10500606 SN, SNR AND ISOLATED NS Oleg Kargaltsev X-ray emission from the double neutron star binary J1537+1155: Powered by the pulsar wind?
10500627 SN, SNR AND ISOLATED NS Yasunobu Uchiyama Time Variability of Synchrotron X-ray Emission in SNR RX J1713.7-3946
10500639 SN, SNR AND ISOLATED NS Knox Long The Luminous Supernova Remnant in NGC4449: Charting the Future for SN 1987A
10500651 SN, SNR AND ISOLATED NS Zdenka Misanovic X-ray observations of a TeV-emitting pulsar tail
10500659 SN, SNR AND ISOLATED NS Victoria Kaspi TINY HICCUPS TO TITANIC EXPLOSIONS: Tackling Transients in Anomalous X-ray Pulsars
10500687 SN, SNR AND ISOLATED NS John Hughes A Deep Cycle 10 Chandra Observation of the Tycho Supernova Remnant
10500688 SN, SNR AND ISOLATED NS Poonam Chandra Solving the Mystery of Type IIn Supernovae
10500693 SN, SNR AND ISOLATED NS Jules Halpern The Weakly Magnetized Pulsar in Kes 79
10500739 SN, SNR AND ISOLATED NS Ralph Tuellmann A pulsar wind nebula in G18.95-1.1?
10500753 SN, SNR AND ISOLATED NS David Burrows Chandra Cycle 10 Spatial and Spectral Monitoring of SNR 1987A
10500758 SN, SNR AND ISOLATED NS Maura McLaughlin The High-B Radio Pulsar PSR J1718-3718: A Quiescent Magnetar?
10500817 SN, SNR AND ISOLATED NS George Pavlov The Unique Dynamical Vela Pulsar Wind Nebula
10500822 SN, SNR AND ISOLATED NS Alicia Soderberg The Energetics and Environments of 'Naked' Supernovae
10500824 SN, SNR AND ISOLATED NS Franz Bauer A Deep HETG Probe of the CSM Interaction in SN1996cr
10500874 SN, SNR AND ISOLATED NS Derek Fox Identifying the Nearest and Brightest Neutron Stars
10500924 SN, SNR AND ISOLATED NS CXC Calibration AO-10 Observations of the Standard Candles Cas A and G21.5-09.
10500927 SN, SNR AND ISOLATED NS CXC Calibration AO-10 Calibration Observations of E0102-72
10610309 NORMAL GALAXIES Steven Allen Bondi accretion and jet power in a complete sample of elliptical galaxies
10610527 NORMAL GALAXIES JOEL BREGMAN The Baryons Content of the Most Massive Spiral Galaxy
10610698 NORMAL GALAXIES Michael Loewenstein Search for Warm Dark Matter with Chandra Observations of Dwarf Spheroidal Galaxies
10610708 NORMAL GALAXIES Andrew Ptak Merger-Induced X-ray Emission in the Superantennae
10610747 NORMAL GALAXIES David Buote Dark Matter in Isolated Elliptical Galaxies
10610775 NORMAL GALAXIES Giuseppina Fabbiano Infant Ellipticals: the evolution of young merger-remnants
10610785 NORMAL GALAXIES David Strickland Wide, deep and sharp: A comprehensive observation of M82, the exemplar of starburst activity
10610898 NORMAL GALAXIES John Mulchaey A Chandra Study of Field Early-Type Galaxies
10620013 NORMAL GALAXIES Philip Kaaret X-Rays from Blue Compact Dwarf Galaxies
10620022 NORMAL GALAXIES Stephen Murray Chandra Observation of a Dark Matter Galaxy in the Virgo Cluster
10620040 NORMAL GALAXIES Stephen Murray Black Hole X-ray Novae in M31
10620091 NORMAL GALAXIES Gordon Garmire NGC 1232 population study
10620402 NORMAL GALAXIES Peter Jonker XMMU J134736.6+173403: the brightest ULX known?
10620409 NORMAL GALAXIES Timothy Roberts Hyperluminous X-ray sources
10620535 NORMAL GALAXIES Andrea Prestwich Chandra Imaging of NGC 922 -- the closest collisional ring galaxy
10620604 NORMAL GALAXIES Douglas Swartz The Most Luminous ULXs
10620720 NORMAL GALAXIES Michael Garcia Monitoring M31 for BHXNe
10620790 NORMAL GALAXIES Frederick Baganoff Multiwavelength Monitoring of the Spectral and Spatial Evolution of Sgr A* Flares
10620799 NORMAL GALAXIES Jonathan Grindlay Completing the Galactic Bulge Latitude Survey (BLS)
10700007 ACTIVE GALAXIES AND QUASARS Jon Miller The Disk-Jet Connection in Seyfert-1 AGN
10700034 ACTIVE GALAXIES AND QUASARS Peter Predehl X-ray spectroscopy of a recoiling SMBH candidate
10700038 ACTIVE GALAXIES AND QUASARS Stephen Murray Longterm Monitoring of the Centaurus A Jet, ULXs, and Low Mass X-ray Binary Population
10700045 ACTIVE GALAXIES AND QUASARS Claude Canizares Obtaining High Signal on the Fe-L Unresolved Transition Array
10700069 ACTIVE GALAXIES AND QUASARS Peter Predehl Flaring galaxies with strong emission-line light echo
10700080 ACTIVE GALAXIES AND QUASARS Gordon Garmire Studying the Optical and X-ray Emission Regions of Quasar PG 1115+080 by Monitoring Microlensing Events
10700081 ACTIVE GALAXIES AND QUASARS Gordon Garmire A Chandra Snapshot Survey of Bright Mini-BAL Quasars
10700119 ACTIVE GALAXIES AND QUASARS Daniel Harris Tracking the Aftermath of the Giant Flare in the M87 Jet
10700121 ACTIVE GALAXIES AND QUASARS Rita Sambruna Testing the Radio-loud vs Radio-quiet AGN Dichotomy through the Ionized Circumnuclear Gas in 3C 445
10700125 ACTIVE GALAXIES AND QUASARS GUIDO RISALITI Short-time monitoring of extreme spectral variations in Seyfert 2s
10700149 ACTIVE GALAXIES AND QUASARS Trinh Thuan Exploratory Chandra observations of low-metallicity AGN candidates
10700189 ACTIVE GALAXIES AND QUASARS Martin Elvis A Co-ordinated Chandra, Suzaku, HST Campaign for NGC3227
10700214 ACTIVE GALAXIES AND QUASARS Shin Mineshige AN X-RAY MICROLENSING TEST OF THE AU-SCALE CENTRAL STRUCTURE OF THE QUADRUPLE QUASAR 2237+0305
10700224 ACTIVE GALAXIES AND QUASARS Martin Hardcastle Probing physical conditions in the extended emission-line regions of powerful radio galaxies: the case of 3C171
10700228 ACTIVE GALAXIES AND QUASARS Christopher Reynolds Deep ACIS-S imaging of two X-shaped radio galaxies
10700258 ACTIVE GALAXIES AND QUASARS William Brandt Identifying High-Redshift X-ray Jets from Radio-Loud Quasars with Chandra
10700299 ACTIVE GALAXIES AND QUASARS Rita Sambruna Jets at Intermediate Redshifts: Shedding Light on Emission Mechanisms and Physics
10700307 ACTIVE GALAXIES AND QUASARS Paul Green Two to Tango? Binary Quasars, their Environments, and the Merger Hypothesis
10700401 ACTIVE GALAXIES AND QUASARS Diana Worrall Mothering and smothering: AGN in merging galaxies
10700465 ACTIVE GALAXIES AND QUASARS Martin Hardcastle The nature of active nuclei in radio galaxies: observations of the 2Jy sample
10700504 ACTIVE GALAXIES AND QUASARS Mark Birkinshaw The multi-faceted X-ray activity of low-redshift active galaxies
10700550 ACTIVE GALAXIES AND QUASARS Greg Madejski Chandra ToO Observations of Flaring GLAST Blazars
10700575 ACTIVE GALAXIES AND QUASARS Judith Croston Feedback in Seyfert galaxies: shocks, jets and winds
10700584 ACTIVE GALAXIES AND QUASARS Tracey Turner Deconstructing AGN X-ray Spectra - Time for a Paradigm Shift?
10700652 ACTIVE GALAXIES AND QUASARS Roberto Gilli Luminous Compton-thick QSOs at z~1
10700657 ACTIVE GALAXIES AND QUASARS Daniel Harris Using Chandra to Understand the TeV Emission from M87
10700660 ACTIVE GALAXIES AND QUASARS Sylvain Veilleux Evolution of Activity in Massive Gas-rich Mergers: The X-ray Perspective
10700662 ACTIVE GALAXIES AND QUASARS Rajib Ganguly Testing the Radiative-Driving Hypothesis of Quasar Outflows
10700664 ACTIVE GALAXIES AND QUASARS Sarah Kaufmann Exploring the X-ray - TeV connection in BL Lacs on short timescales
10700666 ACTIVE GALAXIES AND QUASARS Herman Marshall Completing a Flux-limited Survey for X-ray Emission from Radio Jets
10700667 ACTIVE GALAXIES AND QUASARS Preeti Kharb Probing X-Ray Jet Emission Mechanisms in a Complete Blazar Sample
10700678 ACTIVE GALAXIES AND QUASARS Daniel Evans The Circumnuclear X-Ray Environments of CSS Radio Sources
10700684 ACTIVE GALAXIES AND QUASARS Kajal Ghosh Chandra survey of Polar Broad Absorption-Line Quasars
10700689 ACTIVE GALAXIES AND QUASARS Scott Anderson Chandra X-ray Scrutiny of New Radio-Shy BL Lac Candidates
10700699 ACTIVE GALAXIES AND QUASARS Eric Perlman The Structure and Physics of the Youngest Radio Galaxies
10700750 ACTIVE GALAXIES AND QUASARS Margarita Karovska Mapping the Centaurus A Nuclear Region
10700854 ACTIVE GALAXIES AND QUASARS David Alexander A Complete Census of AGN Activity in Luminous Infrared Galaxies
10700883 ACTIVE GALAXIES AND QUASARS Glennys Farrar Zeroing in on the sources of Ultrahigh Energy Cosmic Rays
10700916 ACTIVE GALAXIES AND QUASARS Ann Zabludoff Using Chandra and HST to Construct the First Detailed Timeline of Early-Type Galaxy Evolution
10700917 ACTIVE GALAXIES AND QUASARS Karen Leighly WPVS 007: the little AGN that could
10700920 ACTIVE GALAXIES AND QUASARS CXC Calibration AO-10 Calibration Observations of 4U 1957+11
10700928 ACTIVE GALAXIES AND QUASARS CXC Calibration AO-10 Calibration Observations of PKS2155-304
10700929 ACTIVE GALAXIES AND QUASARS CXC Calibration AO-10 Calibration Observation of PKS2155-304 Near the Read-Out
10800015 CLUSTERS OF GALAXIES Stephen Murray Bow shock in A754
10800028 CLUSTERS OF GALAXIES Stephen Murray Merging Clusters in DEEP2 Field 4
10800035 CLUSTERS OF GALAXIES Stephen Murray Survey of AGN outbursts in clusters
10800043 CLUSTERS OF GALAXIES Stephen Murray Chandra observations of flux-limited sample of low-redshift galaxy clusters
10800166 CLUSTERS OF GALAXIES Matteo Murgia The X-ray gaseous environment of dying radio sources
10800174 CLUSTERS OF GALAXIES Craig Sarazin Chandra Observations of Abell 3653, the Cluster with the Largest Known cD Peculiar Velocity
10800217 CLUSTERS OF GALAXIES Stefano Andreon Characterisation of ISCS J1438+3414, a z=1.41 galaxy cluster free of X-ray selection bias
10800324 CLUSTERS OF GALAXIES David Rafferty The Remarkably Inefficient AGN Outburst in HCG 62: Total Energy Budget and Lobe Contents
10800331 CLUSTERS OF GALAXIES Roger Morris Mapping Dark Matter in the Merging Cluster MACSJ0025.4
10800395 CLUSTERS OF GALAXIES Harald Ebeling MACSJ1147.3-1252: An extremely X-ray luminous cluster at z=0.58?
10800424 CLUSTERS OF GALAXIES Helen Russell Does AGN heating quench star formation in Brightest Cluster Galaxies?
10800487 CLUSTERS OF GALAXIES John Mulchaey The Formation of Brightest Cluster Galaxies
10800488 CLUSTERS OF GALAXIES Ben Maughan Completing a combined X-ray/Sunyaev-Zel'dovich effect sample of galaxy clusters
10800511 CLUSTERS OF GALAXIES Ben Maughan A Chandra baseline for galaxy cluster evolution studies
10800565 CLUSTERS OF GALAXIES Graham Smith LoCuSS: An Unbiased Multi-wavelength Study of the Cluster Quadchotomy - Gas Cooling and Cluster Merging at z=0.2
10800598 CLUSTERS OF GALAXIES Lori Lubin Local versus Large Scale : The Active Galaxy Population in High-Redshift Clusters
10800641 CLUSTERS OF GALAXIES Brian McNamara A Deep Image of the Most Powerful Cluster AGN Outburst
10800679 CLUSTERS OF GALAXIES Eli Rykoff The Origin and Evolution of Fossil Groups
10800695 CLUSTERS OF GALAXIES Kenneth Cavagnolo The Hyperluminous Infrared Galaxy IRAS 09104+4109: An Extreme Brightest Cluster Galaxy
10800762 CLUSTERS OF GALAXIES Spencer Stanford The Role of AGN in Massive Galaxy Formation
10800770 CLUSTERS OF GALAXIES Harald Ebeling The distribution and interactions of luminous and dark matter in strong-lensing clusters at z>0.3
10800779 CLUSTERS OF GALAXIES Elizabeth Blanton Shocks, Ripples, and Bubbles: A Very Deep Observation of Abell 2052
10800835 CLUSTERS OF GALAXIES Daniel Wik A Merger Shock Front due to Subcluster Infall in Abell 2061?
10800857 CLUSTERS OF GALAXIES Amalia Hicks Deciphering Cluster Observables: Tracing the Baryons in Clusters of Galaxies
10800906 CLUSTERS OF GALAXIES Stephen Murray Abell 2199: AGN outbursts and merger
10800925 CLUSTERS OF GALAXIES CXC Calibration Calibration Observation of the Coma Cluster
10900076 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS Gordon Garmire Deep Follow-up of Intermediate Redshift Groups in the XBootes Survey
10900088 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS Gordon Garmire The Origin and Evolution of Fossil Groups
10900117 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS Andrew Levan Identifying the host galaxies for optically dark gamma-ray bursts
10900388 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS Ian Smail Feedback at high-z and the joint formation of AGN and massive galaxies
10900553 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS Eric Miller Understanding Group Evolution with Chandra
10900836 EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS Taotao Fang A Benchmark Observation of the Warm-Hot Intergalactic Medium
10910054 GALACTIC DIFFUSE EMISSION AND SURVEYS Claude Canizares Absorption and Abundances in the Ultracompact Binary 4U 0614+091
10910312 GALACTIC DIFFUSE EMISSION AND SURVEYS Bryan Gaensler ChIcAGO: Chandra Identification of ASCA Galactic Objects
10910919 GALACTIC DIFFUSE EMISSION AND SURVEYS CXC Calibration AO-10 Calibration Observations of the ACIS charged particle background

Subject Category: STARS AND WD

Proposal Number: 10200053

Title: Summing Flares from EV Lac

PI Name: Claude Canizares

We propose to study the spectral and temporal behavior of flares from the active M-dwarf EV Lac. We will apply three powerful techniques: high-resolution spectroscopic diagnostics to infer flaring loop conditions (temperature, density, dynamics); measurement of flare scale heights from Fe K fluorescence; and state-of-the-art hydrodynamic flare models. The high rate of short flares, the X-ray signature of high density, and the evidence for opacity in X-ray resonance lines make EV Lac an ideal target. A deep flare exposure obtained by summing short events will provide one of the best high-resolution spectra possible for constraining physical models of M-dwarf coronae and flares with detail which can only be achieved through high resolution X-ray spectroscopy.

R.A. Dec. Target Name Det. Grating Exp.Time
22:46:49.70 44:20:02.40 EV Lac ACIS-S HETG 100

Subject Category: STARS AND WD

Proposal Number: 10200070

Title: Revealing the Origin of Hard X-rays in the Remarkable O4-O4 Binary Star System in M17: GTO component

PI Name: Gordon Garmire

The central massive stars in the closest Galactic Giant HII Region M17 are a pair of O4 stars separated by $1.8^{\prime\prime}$. A Chandra Large Project has revealed that both of these O4 stars are extraordinary X-ray sources, showing hard spectra and rapid variability typical of the luminous blue variable $\eta$ Carinae but almost unknown for normal O stars. Using He-like lines resolved by the HETG, we will diagnose whether this remarkable X-ray emission comes from magnetically-channeled wind shocks in single stars or from colliding-wind binaries; if the latter is the case, this pair of early O stars is really a system of four massive stars and constrains models of massive star formation. This is the GTO component of a combined GO/GTO observation (GO PI Marc Gagn\'e).

R.A. Dec. Target Name Det. Grating Exp.Time
18:20:29.90 -16:10:45.10 M17 O4-O4 binary ACIS-S HETG 25

Subject Category: STARS AND WD

Proposal Number: 10200077

Title: G29.96-0.02: The enigma of ultra-compact HII regions

PI Name: Gordon Garmire

Young massive stars have strong stellar winds which sweep up and clear their environment. This is a key factor in stopping the star formation process and disrupting their nascent molecular clouds. We propose Chandra observations of the prototypical ultracompact HII (UCHII) region, G29.96-0.02. The proposed observations will provide direct evidence for this wind-cloud interaction. This target with its cometary morphology, low obscuration, and well-studied flow pattern in the surrounding gas, is optimal for X-ray study of the shocked wind plasma. Measuring the X-ray luminosity, spectrum and morphology of G29.96-0.02 will provide critical quantitative insights into the complex astrophysics of UCHIIs which cannot be acquired at long wavelengths.

R.A. Dec. Target Name Det. Grating Exp.Time
18:46:04.00 -2:39:20.00 G29.96-0.02 ACIS-I NONE 30

Subject Category: STARS AND WD

Proposal Number: 10200079

Title: Search for triggered star formation in the type A bright rimmed cloud 34

PI Name: Gordon Garmire

Bright rimmed clouds (BRCs) near OB stars are excellent laboratories for the study of triggered star formation (TSF) due to the radiation driven implosion (RDI) mechanism. Type A BRCs are clouds at their earliest evolutionary stages and, according to the current theoretical modeling, are not expected to exhibit RDI TSF yet. Employing the Chandra's ability to effectively discern young stellar populations from unrelated old field objects we propose to observe the nearby Type A bright rimmed cloud BRC 34 and test predictions of RDI modelling. BRC 34 will also complement our large GO project on BRCs with the aim to study the RDI star formation efficiency in the Galaxy.

R.A. Dec. Target Name Det. Grating Exp.Time
21:33:32.40 58:03:28.40 BRC34 ACIS-I NONE 30

Subject Category: STARS AND WD

Proposal Number: 10200110

Title: Search for X-ray emission from magnetic chemically peculiar roAp stars

PI Name: Beate Stelzer

Whether intermediate-mass stars can generate X-ray emission is a long-standing problem. A shallow convective envelope is present, but in constrast to late-type dynamo-active stars their magnetic fields are geometrically simple and stable. Commonly any observed X-ray emission from intermediate-mass stars is ascribed to unresolved late-type companions. The rapidly osciallating Ap stars (roAp) are a class of cool, pulsating, chemically peculiar magnetic stars that are known to be single. Therefore, they are prime targets for the search for coronae in the presence of large-scale organized fields. For an explanation of the recent evidence of Promethium, all isotopes of which decay within two decades, flares seem to be the most plausible production mechanism.

R.A. Dec. Target Name Det. Grating Exp.Time
21:10:20.50 10:07:53.70 HD201601 ACIS-I NONE 10

Subject Category: STARS AND WD

Proposal Number: 10200113

Title: Imaging X-Ray Microjets from T Tauri Stars

PI Name: Manuel Guedel

Although many classical T Tauri stars (CTTS) drive bipolar jets, very little is known about the high-energy aspects of these outflows. Recently, two X-ray jets have been discovered from the microjet-driving T Tauri star DG Tau. Both jets are very soft X-ray sources and coincide with the optically visible, much cooler atomic jets. Although faint X-ray sources have also been identified for a few protostellar Herbig-Haro flows, CTTS offer the advantage of an unobscured view down to the star. A spectral anomaly reported for several microjet-driving CTTS (the presence of a strong, constant soft component) suggests that X-ray jets may be common in these objects. We aim at verifying this hypothesis. X-ray jets are potentially important for disk ionization, heating, and chemical processing.

R.A. Dec. Target Name Det. Grating Exp.Time
4:33:39.40 17:51:52.30 HN Tau ACIS-S NONE 30
16:08:29.70 -39:03:10.90 Sz 102 ACIS-S NONE 30

Subject Category: STARS AND WD

Proposal Number: 10200170

Title: G333.6-0.2: An Embedded Giant HII Region in a Proto-OB Association

PI Name: Leisa Townsley

High-resolution X-ray observations of young massive stars and their surrounding clusters are yielding new insights into the star formation process. We wish to study many facets of massive star formation with a 60-ks ACIS-I observation of G333.6-0.2, a nearby Giant HII Region (GHR) formed very recently, along with two other very young GHRs, in the giant molecular cloud (GMC) G333. We will study embedded massive stars, their surrounding compact cluster of pre-main sequence stars, and the wider context of star formation and GMC evolution in G333, which may be an OB association in the making. We expect to identify hundreds of cluster members and perhaps diffuse X-rays tracing wind-shocked plasma filling G333.6-0.2's large-scale bipolar bubble.

R.A. Dec. Target Name Det. Grating Exp.Time
16:22:09.20 -50:06:03.50 G333.6-0.2 ACIS-I NONE 60

Subject Category: STARS AND WD

Proposal Number: 10200216

Title: X-ray emission from the magnetic star alpha ^2 Canum Venaticorum ?

PI Name: J rgen Schmitt

We propose a 15 ksec pilot study with Chandra ACIS-S of the visual binary system alpha^2 CVn (= HR~4915 and HR~4914). With an angular separation of $\sim$ 21.3 arcsec this system can be easily resolved with {\it Chandra}. X-ray emission from alpha^2 CVn has been detected with the Einstein Observatory IPC and in the ROSAT RASS data, however, the angular resolution of these data is insufficient to attribute the detected X-ray emission to the F0 component HR~4914 or the A0spe component HR~4915. Since HR~4915 has a measured magnetic field of a few kG, the correct attribution of the detected X-ray emission has far reaching consequences. With the proposed 15 ksec ACIS-S pilot study at the binary HR~4914/4915 we can provide the feasibility of a possible grating observation.

R.A. Dec. Target Name Det. Grating Exp.Time
12:56:01.70 38:19:06.10 Alpha CVn ACIS-S NONE 15

Subject Category: STARS AND WD

Proposal Number: 10200260

Title: Activity and Rotation in the Zero Age Main Sequence cluster h Per

PI Name: Giuseppina Micela

We will explore the relation between the X-ray luminosity and rotational period in the young open cluster h Per. The age of this cluster (13 Myr) is crucial for the subsequent evolution of the stellar activity and rotation, being at the transition between the PMS and the ZAMS, when a star has reached its maximum rotational velocity. At that age both fast and slow rotators may co-exist, each group having dynamos and coronae following different regimes. h Per with its age and richness is an ideal target for these studies, hosting a very rich sample of coeval stars. We will also take advantage of the rotational periods recently derived with the program Monitor that is able to determine also relatively long rotational periods, allowing us to study at the same time slow and fast rotators.

R.A. Dec. Target Name Det. Grating Exp.Time
2:19:02.20 57:07:12.00 h Per ACIS-I NONE 40
2:19:02.20 57:07:12.00 h Per ACIS-I NONE 160

Subject Category: STARS AND WD

Proposal Number: 10200267

Title: Berkeley 87: A Young Cluster Embedded in a Supersonic Wolf-Rayet Wind

PI Name: Stephen Skinner

The young open cluster Berkeley 87 in Cygnus (age 1 - 2 Myr; d = 950 kpc) is the only galactic cluster known to harbor a rare oxygen-type Wolf-Rayet star (WR 142). This WO-type star is in a highly-evolved pre-supernova state and its supersonic wind (v = 5500 km/s) is producing dissipative shock waves, as traced by diffuse optical CIV emission. Berk 87 shows clear signs of high-mass star formation including OH masers and compact HII regions. We propose to observe Berk 87 with ACIS-I. This observation will test theories of X-ray production in massive stars and determine if diffuse X-rays from the shocked WR wind are present.

R.A. Dec. Target Name Det. Grating Exp.Time
20:21:44.30 37:22:30.60 Berkeley 87 ACIS-I NONE 70

Subject Category: STARS AND WD

Proposal Number: 10200270

Title: Unusual X-ray Emission from the Rapidly Accreting Young Star FU Orionis

PI Name: Stephen Skinner

FU Orionis objects are a class of very young low-mass stars that have undergone dramatic optical outbursts attributed to an increase in the disk accretion rate onto the star. The intense energy release from these outbursts will vaporize solid material in the terrestrial planet zone and may thus profoundly influence planet formation. We propose to observe the prototype of the class, FU Ori, with ACIS. It is rapidly accreting, has a powerful wind, and is known to have an unusual double absorption X-ray spectrum from a previous XMM observation. Chandra will provide the higher spatial resolution image and improved CCD spectrum needed to clarify the source morphology and origin of the unusual X-ray emission.

R.A. Dec. Target Name Det. Grating Exp.Time
5:45:22.40 9:04:12.30 FU Orionis ACIS-S NONE 100

Subject Category: STARS AND WD

Proposal Number: 10200277

Title: ToO Studies with CXO of Pre-Main Sequence Stars Undergoing Optical Outbursts

PI Name: David Weintraub

Dramatic optical outbursts, which signal the onset of rapid and dramatic accretion onto pre-main sequence stars through their disks, cannot be predicted; however, our previous CXO campaign to study the outburst source V1647 Ori demonstrates that studies of such stars made with CXO beginning immediately after outburst can dramatically increase our knowledge about how and why such stars undergo outbursts and accrete mass. We therefore propose a ToO campaign to observe any such star discovered during Cycle 10. We will use ACIS-I to carry out three imaging spectroscopy observations of 20 ks, 20 ks, and 30 ks duration and spaced by intervals of three months, beginning immediately after discovery and continuing through the end of Cycle 10.

R.A. Dec. Target Name Det. Grating Exp.Time
5:46:13.10 -0:06:04.80 V1647 Ori ACIS-I NONE 20
5:46:13.10 -0:06:04.80 V1647 Ori ACIS-I NONE 20
5:46:13.10 -0:06:04.80 V1647 Ori ACIS-I NONE 30

Subject Category: STARS AND WD

Proposal Number: 10200283

Title: IM Lup comes to age: A turnover from accretion to coronae?

PI Name: Hans Guenther

We propose to obtain a Chandra/HETGS spectrum of IM Lup with an exposure of 150 ks. IM Lup is the only known X-ray bright transition object between the classical T Tauri star phase and the weak-lined T Tauri phase. IM Lup shows an IR excess, but its Halpha equivalent width is small, indicating very low accretion rates. The Chandra spectrum will provide important information on the accretion process during the last stages of disk dispersal and therefore the latest possible time for planet growth. We will study the abundance pattern, trace the plasma density in He-like triplets, enhance the observational findings with accretion shock simulations and relate our results to the long-standing problem of disk dispersal and angular momentum evolution in young stars.

R.A. Dec. Target Name Det. Grating Exp.Time
15:56:09.20 -37:56:06.30 IM Lup ACIS-S HETG 150

Subject Category: STARS AND WD

Proposal Number: 10200304

Title: The Cycles of Alpha Centauri

PI Name: Thomas Ayres

Alpha Centauri (G2V + K1V) is the nearest system of Sun-like stars; the primary long regarded a solar twin. The binary has been a popular target for previous X-ray missions, although the shrinking orbit now is resolvable only by Chandra. The 25 year X-ray record has revealed striking long term changes in the Alpha Cen coronae, including a deep X-ray minimum of the primary spotted by XMM in 2004-05. A recent LETGS pointing showed that the G star had become quite deficient in >2 MK emissions, but the softer 1 MK spectrum was little changed. Two additional 10 ks HRC-I snapshots in 2009 will continue this remarkable coronal narrative. We also propose key HST FUV spectra of the pair, to constrain emission measures and probe subcoronal dynamics.

R.A. Dec. Target Name Det. Grating Exp.Time
14:39:31.40 -60:50:01.00 Alpha Centauri HRC-I NONE 10
14:39:31.40 -60:50:01.00 Alpha Centauri HRC-I NONE 10

Subject Category: STARS AND WD

Proposal Number: 10200353

Title: Using a Cool B Supergiant to Probe the Deepest X-Ray Emitting Layers of a Dense Stellar Wind

PI Name: Wayne Waldron

We are requesting a 234 ks HETGS observation of the early B supergiant Kappa Ori (B0.5Ia). Among the OB supergiants, Kappa Ori is one of the brightest, but it has not been observed at high spectral resolution. The wind properties of this star as compared to other OB stars will allow us to probe stellar wind distributed X-ray source models from a different perspective and allow us to address the serious issues pertaining to the origin of OB stellar X-ray emission. Models suggest that all f/i derived radii will be distributed at much deeper wind depths than previously determined allowing us to study the X-ray emission properties near the base of the wind. In addition, the first direct measurement of an OB stellar X-ray electron density may be possible.

R.A. Dec. Target Name Det. Grating Exp.Time
5:47:45.30 -9:40:11.00 Kappa Ori ACIS-S HETG 74
5:47:45.30 -9:40:11.00 Kappa Ori ACIS-S HETG 160

Subject Category: STARS AND WD

Proposal Number: 10200414

Title: Collisionless plasma dynamics in WR140 near the 2009 eclipse and periastron

PI Name: Andrew Pollock

In January 2009, the two most extraordinary high-mass colliding-wind binary systems, eta Car and WR140, will both go through the periastron passages of their respective 5.5 and 7.9 year orbits. The preceding weeks are the most favorable for observing the rapid rise to X-ray maximum and learning fundamental lessons about shocks, hot plasmas and mass-loss in the upper HR diagram. Two HETGS spectra of WR140 before periastron and one after will capture its response to the changing physical conditions that follow the well-defined orbital geometry, offering unique information about the dynamics, dissipation and relaxation of collisionless shocks. The proposals on WR140 and eta Car will take advantage of opportunities for X-ray specroscopy that might nt arise again.

R.A. Dec. Target Name Det. Grating Exp.Time
20:20:28.00 43:51:16.20 WR 140 ACIS-I NONE 20

Subject Category: STARS AND WD

Proposal Number: 10200468

Title: Exploring the Stable Coronae of LP349-25 through X-ray and Radio Emission

PI Name: Rachel Osten

The observed correlation between X-ray and radio luminosities for active stars suggests a common coronal energy reservoir from which both processes (particle acceleration for radio emission and plasma heating for X-ray emission) draw. There is a discrepancy of four orders of magnitude in L_X/L_R for very low mass stars compared to active stars, but radio variability from a different emission mechanism may complicate the interpretation. We propose to obtain X-ray and radio observations of a radio-bright close binary, LP349-25, to explore the L_X/L_R relationship for this object with apparently constant radio emission.

R.A. Dec. Target Name Det. Grating Exp.Time
0:27:55.90 22:19:32.80 LP349-25 ACIS-S NONE 40

Subject Category: STARS AND WD

Proposal Number: 10200496

Title: Anomalous Adara: The Spatial and Spectral Properties of Extended X-Ray Emission

PI Name: david huenemoerder

We propose to obtain a 10ks ACIS image and spectrum of Adara (epsilon CMa) to characterize an unusual and unexplained spatially extended emission feature in this astrophysically important object. This supposedly non-variable B2 II star shows extended emission in the LETGS zero order and in the spatial dimension of the dispersed spectrum. The LETGS spectrum shows an unusual and broad (10 A) excess centered on 30 A (0.4 keV). The spectral excess was not present in XMM/RGS spectra taken 5 years earlier. Since Adara is noted for its absence of variability, its very low line-of-sight column density, and high EUV flux, it is considered to be a standard for B2 supergiant atmospheric and wind studies. Something has changed. ACIS data are necessary to understand this unprecedented feature.

R.A. Dec. Target Name Det. Grating Exp.Time
6:58:37.50 -28:58:19.50 Adara ACIS-S NONE 10

Subject Category: STARS AND WD

Proposal Number: 10200509

Title: Testing the Colliding Wind Paradigm: X-rays from the Wolf-Rayet Binary System WR 147

PI Name: Svetozar Zhekov

We propose a deep HETG exposure of the Wolf-Rayet binary system WR 147. The excellent gratings and zero-order data will be used to put tight constraints on the validity of the colliding stellar wind (CSW) mechanism assumed responsible for the X-rays from this object. The detection of broad emission lines with profiles and centroids in agreement with synthetic colliding wind spectra, along with confirmation of the spatially extended X-ray emission reported from the previous short HRC-I exposure, would support the colliding wind picture. On the other hand, narrow (or unresolved) unshifted emission lines would require an interpretation other than CSW. Thus, this study will be the most rigorous test of the CSW paradigm in a WN+OB binary so far.

R.A. Dec. Target Name Det. Grating Exp.Time
20:36:43.70 40:21:07.30 WR 147 ACIS-S HETG 40
20:36:43.70 40:21:07.30 WR 147 ACIS-S HETG 50
20:36:43.70 40:21:07.30 WR 147 ACIS-S HETG 50
20:36:43.70 40:21:07.30 WR 147 ACIS-S HETG 50
20:36:43.70 40:21:07.30 WR 147 ACIS-S HETG 50
20:36:43.70 40:21:07.30 WR 147 ACIS-S HETG 60

Subject Category: STARS AND WD

Proposal Number: 10200574

Title: V2129 Oph: a close look at a CTTS

PI Name: Ettore Flaccomio

We propose to obtain a high resolution X-ray spectrum of the CTT star V2129 Oph in the \rho Ophiuchi star forming cloud. The 200 ks Chandra observation is part of a larger program that includes optical Doppler and Zeeman-Doppler mapping of the stellar photosphere and magnetic field and a simultaneous monitoring of accretion signatures. V2129 Oph is one of the two CTTS for which a magnetogram has been published. Our primary objective is to derive the differential emission measure and the density of the cool plasma at the accretion shock, directly testing the prediction of a published coronal and accretion model, revised with new maps of the magnetic field.

R.A. Dec. Target Name Det. Grating Exp.Time
16:27:40.30 -24:22:02.60 V2129 Oph ACIS-S HETG 100
16:27:40.30 -24:22:02.60 V2129 Oph ACIS-S HETG 100

Subject Category: STARS AND WD

Proposal Number: 10200596

Title: X-RAY AND FUV PHOTO-IONIZATION/-EXCITATION OF TRANSITIONAL DISKS AROUND THE PMS STARS HD135344B and Lk Halpha 330

PI Name: Alexander Brown

Transitional disks have transformed most of the dust and gas in their inner regions into planetesimals or larger solid bodies. They are a rare, short-lived phase of PMS disk evolution and provide important physical insights and modeling constraints on disk and protoplanetary system evolution. We propose to observe two intermediate mass stars with transitional disks, HD135344B and Lk Halpha 330, using ACIS-S on Chandra and the COS FUV spectrograph on HST. We will use these spectra to determine the coronal, transition region, and upper chromospheric emission measure distribution, covering temperatures from 10,000 K to 10 MK, and then calculate the full X-ray/EUV/FUV radiation field for use in modeling its photoexcitation/photoionization effects on the disk structure.

R.A. Dec. Target Name Det. Grating Exp.Time
15:15:48.60 -37:09:16.00 HD135344 ACIS-S NONE 33

Subject Category: STARS AND WD

Proposal Number: 10200618

Title: Testing Shock Dynamics in Eta Carinae with HETGS After the 2009 Periastron Passage

PI Name: Michael Corcoran

We propose 2 HETGS observation after the X-ray minimum/periastron passage of Eta Car in Jan. 2009. These observations will take place just after the end of the "high absorption" interval, and just before the wind-blown "bubble" around the companion star breaks through the wind of Eta Car. The X-ray line profiles will be used with previously awarded HETGS observations before the minimum and synthetic line profile models and 3-D wind models and compared to the variations during the 2003.5 minimum to constrain fundamental properties of the flow like the size of the emitting region.

R.A. Dec. Target Name Det. Grating Exp.Time
10:45:03.60 -59:41:04.30 Eta Car, Post-Minimum ACIS-S HETG 80
10:45:03.60 -59:41:04.30 Eta Car, Post-Minimum ACIS-S HETG 80

Subject Category: STARS AND WD

Proposal Number: 10200738

Title: Evolution of Young Stars in the Large Massive Cluster Cep OB3b

PI Name: Thomas Allen

We propose deep ASIC-I imaging of the CepOB3b cluster, a large (> 1000 member), 5 Myr old cluster, 700 pc from the Sun. Spitzer observations have mapped the full extent of CepOB3b, showing two distinct sub-clusters. We will target each sub-clusters to identify the young stars without disks and determine the X-ray properties of the stars. These observations will probe the properties of a young cluster and its constituent stars at a poorly studied evolutionary age, thereby complementing the COUP survey of the 2 Myr old Orion Nebula Cluster. We will study the dynamical evolution of clusters emerging from their parental clouds, the evolution of stellar coronae, the affect of circumstellar disks on the X-ray emission, and the role of X-rays in creating inner holes in disks.

R.A. Dec. Target Name Det. Grating Exp.Time
22:53:31.70 62:35:33.40 V454 Cep sub-cluster ACIS-I NONE 75
22:55:47.50 62:38:10.30 Cep B sub-cluster ACIS-I NONE 75

Subject Category: STARS AND WD

Proposal Number: 10200757

Title: The true nature of HD 110432: the most extreme gamma Cas analog

PI Name: Jose Torrejon

We propose to use the high resolution capabilities of Chandra gratings to study the nature of the Be/X-ray source 1H1249-637=HD 110432, the most extreme of the known gamma Cas analogs. Two hypotheses have been put forward to explain the origin of the X-ray emission in these objects: a) accretion onto a compact object and b) emission from the star+disk interaction through stellar magnetic fields. Both of these challenge profoundly our current understanding of the structure of massive stars and/or how binary systems evolve. HD110432 displays extreme conditions within its class: the hottest plasma (> 20 keV), the hardest spectrum, an enormous circumstellar disk and a close to edge-on inclination.

R.A. Dec. Target Name Det. Grating Exp.Time
12:42:50.30 -63:03:31.10 HD 110432 ACIS-S HETG 150

Subject Category: STARS AND WD

Proposal Number: 10200787

Title: The Origin of Hard X-rays in M17's Remarkable O4-O4 Binary

PI Name: Marc Gagne

At 2 kpc M17 is the nearest giant HII region, with 10,000 stars younger than 1 Myr and a prominent X-ray champagne flow. At the heart of M17 are CEN 1A and 1B, a visual pair of O4 stars separated by only 1.8". A long series of ACIS observations show that each O4 star is a very hard time variable X-ray source. We suggest that one or both O4 stars are themselves colliding wind shock binaries or, alternatively, that one or both have strong magnetic fields. We propose to obtain time-resolved, spatially resolved HEG/MEG spectra of both stars to measure He-like line ratios and line profiles to directly test these two models. This roll-constrained 150-ks GO proposal is tied to a 25-ks GTO proposal (PI: Garmire) for the same target.

R.A. Dec. Target Name Det. Grating Exp.Time
18:20:29.90 -16:10:44.40 M17 ACIS-S HETG 150

Subject Category: STARS AND WD

Proposal Number: 10200804

Title: Constraining the Effects of High Energy Photons on Proto-Planetary Disk Chemistry and Evolution

PI Name: Gregory Herczeg

We propose to conduct a multi-wavelength monitoring campaign of two classical T Tauri stars (TW Hya and GM Aur) that possess transitional disks, produce variable [Ne II] emission, generate substantial X-ray emission, and are still actively accreting. Leveraging the variable nature of X-rays, [Ne II] emission, and the mass accretion rates of these sources, we will search for a correlations in these data to provide the first direct observational evidence of the role X-rays and EUV photons play in driving disk chemistry and the evolution of proto-planetary disks. We request three independent observations of each source over the next year supported by ground-based observations with the mid-IR spectrograph MICHELLE on Gemini North and the R-C optical spectrograph on SMARTS at CTIO.

R.A. Dec. Target Name Det. Grating Exp.Time
4:55:11.00 30:21:59.40 GM Aur ACIS-S NONE 15
4:55:11.00 30:21:59.40 GM Aur ACIS-S NONE 15
4:55:11.00 30:21:59.40 GM Aur ACIS-S NONE 15

Subject Category: STARS AND WD

Proposal Number: 10200840

Title: CORONAL AND TRANSITION REGION HEATING DUE TO MAGNETIC ACTIVITY ON METAL-POOR DWARF STARS

PI Name: Alexander Brown

How does low metallicity affect the heating and resultant temperature structure of the chromospheres/transition regions/coronae of old solar-like dwarf stars? Our ACIS-S observations of 7 Gyr old Arcturus Moving Group (AMG) dwarfs show very little conventional coronal (> 1 MK) plasma and suggest that these stars have insufficient magnetic energy input to power a solar-like corona. However, they do have chomospheres and transition regions similar to the minimum activity Quiet Sun. It this typical or an aberration of the AMG? We propose a 35 ksec ACIS-S observation of the nearest (9.2 pc), truely metal-poor ([Fe/H] = -1.4) dwarf star that is known to have definite magnetic dynamo activity (activity cycles, active region modulation) -- HD103095 -- to investigate this question further.

R.A. Dec. Target Name Det. Grating Exp.Time
11:53:01.80 37:42:14.90 HD103095 ACIS-S NONE 35

Subject Category: STARS AND WD

Proposal Number: 10200900

Title: Direct X-ray measurements of the expansion of planetary nebulae

PI Name: Young YU

We propose the first direct measurements of the proper motion of X-ray-emitting regions within planetary nebulae (PNs), via new Chandra observations of the PNs NGC 7027 and BD +303639. In the case of NGC 7027, measurement of the speeds of X-ray-emitting jets will provide a straightforward and unique test of simple jet shock models and unparalleled insight into the evident rapid structural evolution of this seminal young PN. In the case of BD+303639, confirmation of our tentative result that its X-ray ``hot bubble'' is expanding at about 200 km/s would represent a milestone in our understanding of the wind interactions that shape PNs.

R.A. Dec. Target Name Det. Grating Exp.Time
19:34:45.20 30:30:58.90 BD+303639 ACIS-S NONE 80

Subject Category: STARS AND WD

Proposal Number: 10200901

Title: X-ray Monitoring of Eta Car in 2009: Unveiling the Deep X-ray Minimum

PI Name: Kenji Hamaguchi

X-ray observations of Eta Car near the 2003 periastron passage confirmed that the X-ray emission primarily arises from wind-wind collision (WWC) in a binary system, but raised fundamental questions about the cause of the 3 month-long minimum. The current promising mechanism is either an eclipse of the WWC plasma by primary winds or a fading of the WWC activity due to an increase in gas density, which relates to the mass loss mechanism which influences the evolution of massive stars. To test these scenarios, we propose key, targeted high signal-to noise observations of the faintest phase missed in 2003 to track both the flux and spectral variations. We request joint observations of Eta Car with Chandra and XMM-Newton around the 2009 minimum.

R.A. Dec. Target Name Det. Grating Exp.Time
10:45:03.60 -59:41:04.20 Eta Carinae ACIS-S NONE 15
10:45:03.60 -59:41:04.20 Eta Carinae ACIS-S NONE 15
10:45:03.60 -59:41:04.20 Eta Carinae ACIS-S NONE 15
10:45:03.60 -59:41:04.20 Eta Carinae ACIS-S NONE 15
10:45:03.60 -59:41:04.20 Eta Carinae ACIS-S NONE 15

Subject Category: STARS AND WD

Proposal Number: 10200921

Title: AO-10 Calibration Observations to Monitor the Spatial Variations in the HRC-I Gain

PI Name: CXC Calibration

We continue to monitor the small scale gain variations in the HRC-I with raster scans of ArLac.

R.A. Dec. Target Name Det. Grating Exp.Time
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-I NONE 3

Subject Category: STARS AND WD

Proposal Number: 10200922

Title: AO-10 Calibration Observations of Capella

PI Name: CXC Calibration

We continue to monitor the dispersion relation of the gratings with annual observations of Capella.

R.A. Dec. Target Name Det. Grating Exp.Time
5:16:42.30 45:59:52.40 Capella HRC-S LETG 30
5:16:42.30 45:59:52.40 Capella ACIS-S HETG 30

Subject Category: STARS AND WD

Proposal Number: 10200923

Title: AO-10 Calibration Observations to Monitor the Spatial Variations in the HRC-S Gain

PI Name: CXC Calibration

We continue to monitor the small scale gain variations in the HRC-S with raster scans of ArLac.

R.A. Dec. Target Name Det. Grating Exp.Time
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 1
22:08:40.80 45:44:32.30 ArLac HRC-S NONE 3

Subject Category: STARS AND WD

Proposal Number: 10200926

Title: AO-10 Calibration Observations of HZ43

PI Name: CXC Calibration

We continue to monitor the low energy response of the HRC with observations of HZ43.

R.A. Dec. Target Name Det. Grating Exp.Time
13:16:22.10 29:05:56.40 HZ43 HRC-I LETG 2
13:16:22.10 29:05:56.40 HZ43 HRC-S LETG 20

Subject Category: STARS AND WD

Proposal Number: 10200930

Title: AO-10 Measurements of the optical/UV Transmission of the HRC Filters.

PI Name: CXC Calibration

We continue to monitor the optical/UV transmission of the HRC filters with observations of Vega.

R.A. Dec. Target Name Det. Grating Exp.Time
18:36:56.40 38:47:01.60 Vega HRC-I NONE 2
18:36:56.40 38:47:01.60 Vega HRC-I NONE 2
18:36:56.40 38:47:01.60 Vega HRC-I NONE 2
18:36:56.40 38:47:01.60 Vega HRC-I NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2
18:36:56.40 38:47:01.60 Vega HRC-S NONE 2

Subject Category: WD BINARIES AND CV

Proposal Number: 10300001

Title: Resolving short supersoft source states of optical novae in the core of M31

PI Name: Wolfgang Pietsch

We propose to continue the monitoring of the M31 core with 5x23ks XMM EPIC and 5x20ks Chandra HRC-I observations equally distributed from Nov 2008 to mid Feb 2009 to determine additional lightcurves for short SSS states of optical novae. SSS states with <100 d duration indicate accreting massive white dwarfs. They are proposed as SN Ia progenitors and determining their frequency is very important. We will correlate detected sources with novae from optical monitoring. With a nova rate in the field of ~25/yr and SSS states lasting from weeks to years we will follow light curves of many novae. Durations of the nova SSS state will allow us to constrain envelope and whitedwarf masses. We will also monitor time variability of ~200 M31 centre X-ray sources (mostly XRBs).

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20

Subject Category: WD BINARIES AND CV

Proposal Number: 10300026

Title: Resolving short supersoft source states of optical novae in the core of M31

PI Name: Peter Predehl

We propose to continue our monitoring of the M31 core by 2x20ks Chandra HRC I observations mid and end Feb 2009 to determine the light curves of the short SSS states of optical novae. SSS states with $<$100 d duration indicate accreting massive white dwarfs (WD). They are proposed as SN Ia progenitors and determining their frequency is very important. The detected sources will be correlated with optical nova positions from monitoring programs covering the same area. With a nova rate in the field of ~25/yr and SSS states lasting from weeks to years we will simultaneously follow light curves of many novae. The durations of the nova SSS state will allow us to constrain the envelope and WD masses. We will also monitor time variability of ~200 M31 centre X-ray sources (mostly XRBs).

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20
0:42:44.30 41:16:09.40 M31 HRC-I NONE 20

Subject Category: WD BINARIES AND CV

Proposal Number: 10300323

Title: Chandra Observation of a New Galactic Globular Cluster -- FSR 584

PI Name: David Pooley

We propose a 20 ksec ACIS-S3 observation of the star cluster FSR 584, which was recently discovered in 2MASS data and argued to be a globular cluster. This heavily obscured object lies nearly in the Galactic plane at only 1.4 kpc, making it the closest globular cluster. A relatively short observation will allow us to take a census of the X-ray emitting objects in this cluster (with Lx > 4x10^30 ergs/sec), such as quiescent low-mass X-ray binaries, cataclysmic variables, millisecond radio pulsars, and chromospherically active main-sequence binaries. As our work with another recently discovered globular cluster in the plane (GLIMPSE-C01) has shown, Chandra data can be used to help rule out the alternative for this object, namely, an old open cluster.

R.A. Dec. Target Name Det. Grating Exp.Time
2:27:15.00 61:37:28.00 FSR 584 ACIS-S NONE 20

Subject Category: WD BINARIES AND CV

Proposal Number: 10300356

Title: CP Puppis, a template for the secular evolution of novae

PI Name: Marina Orio

We propose a Chandra HETG observation of the extraordinary quiescent nova CP Puppis, to follow up on our XMM-Newton study. The HETG spectrum will provide a tighter constraint on the cooling flow model fit, which we have used to infer the white dwarf mass and the mass accretion rate in this nova, testing the theory of nova outbursts. Chandra will allow us to spatially resolve the nova shell, and to understand whether the O VII triplet originates in the shell or whether photoionization is important. We will perform sensitive diagnostics using a wide range of lines. CP Puppis offers a unique possibility to prove the dependence of the thermonuclear burning evolution on the physical parameters of the system.

R.A. Dec. Target Name Det. Grating Exp.Time
8:11:46.10 -35:21:05.00 CP Puppis ACIS-S HETG 20
8:11:46.10 -35:21:05.00 CP Puppis ACIS-S HETG 160

Subject Category: WD BINARIES AND CV

Proposal Number: 10300452

Title: RS Ophiuchi: First X-ray Jet from a Nova

PI Name: Jennifer Sokoloski

A highly collimated outflow from a nova has been imaged for the first time, both in the radio, and in the X-rays with Chandra. With its high velocity and its synchrotron radio lobes, this outflow from the symbiotic star RS Ophiuchi pushes the exploration of non-relativistic jets into a new regime. The production of a collimated jet within a few days of outburst also challenges the assumption that in a nova the blastwave sweeps away the accretion disk. We propose a second Chandra image of the evolving jet from RS Ophiuchi to determine the properties of this new type of jet, the conditions that led to its production, and the nature of the accretion disk that must have survived the nova explosion. This work has implications for our fundamental understanding of both jets and novae.

R.A. Dec. Target Name Det. Grating Exp.Time
17:50:13.20 -6:42:28.50 RS Ophiuchi ACIS-S NONE 140

Subject Category: WD BINARIES AND CV

Proposal Number: 10300531

Title: Grating spectroscopy of a bright nova in outburst

PI Name: Thomas Nelson

We propose a TOO program to obtain LETG spectroscopy of a classical or recurrent nova in outburst, if it is observed to turn into a luminous supersoft X-ray source with Swift. In the rare case that a nova has unusually luminous hard X-ray flux in the initial stages, we also propose to obtain a HETG spectrum of the ejected shell. Our aims are: a) to constrain the mass, temperature and chemical composition of the white dwarf by analyzing the spectrum, b) to correlate spectral and temporal variablility during the nuclear burning phase, and c) to use the HETG to explore wind mass loss in a recurrent nova. The proposed study is important not only for nova/CV theory, but for understanding supernova Ia progenitors.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 A new nova HRC-S LETG 35
0:00:00.00 0:00:00.00 A new nova ACIS-S HETG 20

Subject Category: WD BINARIES AND CV

Proposal Number: 10300566

Title: The Nature of the Soft Component in the Symbiotic Star CH Cygni

PI Name: Koji Mukai

The symbiotic star CH Cyg consists of an M giant and a white dwarf, and displays a two-component X-ray spectrum. The absorbed hard X-ray component is likely due to accretion onto the white dwarf. The unabsorbed soft X-ray component is thought to be either due to colliding winds or due to photoionization of the M giant wind by the hard component. We propose to obtain a high signal-to-noise grating spectrum of CH Cyg to resolve the origin of its soft component. Once we know its origin, we can begin to probe the environment around the white dwarf using the detailed spectral shape of the soft component. We propose this as a slow TOO, to be triggered when we know that CH Cyg is X-ray bright.

R.A. Dec. Target Name Det. Grating Exp.Time
19:24:33.10 50:14:29.10 CH Cygni ACIS-S HETG 100

Subject Category: WD BINARIES AND CV

Proposal Number: 10300586

Title: PlaN-B: The hyperactive coronae of interacting companions in planetary nebulae

PI Name: Orsola De Marco

With this proposal we seek to obtain ACIS-S spectra of two central stars of planetary nebula, known to have post-common envelope central stars with main sequence companions. We expect these companions to have been spun up during the common envelope and to have X-ray bright cornoae as a result. These detections will establish the X-rays as a way of detecting M-type main sequence companions to central stars, which are hard to detect with other methods. The Lx and Tx will be compared to prediction from models and will be used to carry out a first determination of the amount of mass and angular momentum accreted during the common envelope.

R.A. Dec. Target Name Det. Grating Exp.Time
3:03:47.00 64:54:35.40 PN HFG 1 ACIS-S NONE 11.5
10:54:40.60 -48:47:02.80 PN DS 1 ACIS-S NONE 24.2

Subject Category: WD BINARIES AND CV

Proposal Number: 10300600

Title: Uncovering the interacting binary population in NGC 6681

PI Name: Andrea Dieball

We propose to carry out 70 ksec X-ray imaging of the globular cluster NGC 6681 with Chandra. This cluster was extensively observed in the FUV with HST, yielding the deepest FUV survey of a globular cluster to date. Our X-ray observations will allow us to (i) find X-ray counterparts to the white dwarf - main sequence star binaries in our ultra-deep FUV survey, thus identifying and confirming the cataclysmic variables amongst them; (ii) detect the X-ray faintest interacting binaries (IBs) in this cluster; (iii) classify all X-ray sources based on their X-ray, FUV and optical properties; (iv) and finally, using all the information obtained, test models for IB formation and evolution and verify the empirical results emerging from previous work on other clusters.

R.A. Dec. Target Name Det. Grating Exp.Time
18:43:12.70 -32:17:31.00 NGC 6681 ACIS-S NONE 70

Subject Category: WD BINARIES AND CV

Proposal Number: 10300704

Title: Understanding the Current Dynamical States of Globular Clusters

PI Name: David Pooley

We appear to be on the verge of a major paradigm shift in our understanding of the current dynamical states of Galactic globular clusters. Fregeau (2008) brought together two recent theoretical breakthroughs as well as an observational breakthrough made possible by Chandra -- that a globular cluster's X-ray source population scales with its dynamical encounter frequency -- to persuasively argue that we have misunderstood the dynamical states of Galactic globular clusters. The observational evidence hinges on Chandra results from clusters which are classified as "core collapsed," of which there are only a handful of observations. I propose a nearly complete census with Chandra of the rest of the "core collapsed" globular clusters.

R.A. Dec. Target Name Det. Grating Exp.Time
15:35:28.50 -50:39:34.00 NGC 5946 ACIS-S NONE 25
17:21:10.20 -19:35:14.00 NGC 6342 ACIS-S NONE 16
17:23:58.60 -26:21:13.00 NGC 6355 ACIS-S NONE 23
17:50:51.70 -34:35:57.00 NGC 6453 ACIS-S NONE 22
18:01:38.80 -26:50:23.00 Terzan 9 ACIS-S NONE 17
18:10:17.60 -31:45:50.00 NGC 6558 ACIS-S NONE 12

Subject Category: WD BINARIES AND CV

Proposal Number: 10300769

Title: Searching for Millisecond Pulsars in Extremely Low-Mass White Dwarf Binaries

PI Name: Craig Heinke

Several extremely low-mass white dwarfs, with masses below 0.24 solar masses, have recently been discovered in large surveys. These white dwarfs cannot be formed through the evolution of single stars, and several are known as companions of millisecond radio pulsars. We propose a search for X-ray emission from six relatively bright extremely low-mass white dwarfs to distinguish between neutron star vs. white dwarf companions. New millisecond pulsars with companions amenable to spectroscopy are of great interest, while ruling out neutron star companions will put constraints on common envelope models for double white dwarf evolution.

R.A. Dec. Target Name Det. Grating Exp.Time
9:23:45.60 30:28:05.00 SDSS J092345+302805 ACIS-S NONE 1
10:53:53.90 52:00:31.00 SDSS J105353+520031 ACIS-S NONE 21
12:34:10.40 -2:28:02.80 SDSS J123410-022802 ACIS-S NONE 5.2
22:36:30.00 22:32:24.00 LP 400-22 ACIS-S NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 10400006

Title: Weighing the ULX in M82 via QPO-Spectral Correlations from Simultaneous Chandra and XMM-Newton Observations

PI Name: Hua Feng

The ultraluminous X-ray source (ULX) X41.4+60 in M82 is one of the best intermediate-mass black hole candidates. It shows luminosities 500 times the Eddington limit of a neutron star and quasi-periodic oscillations (QPOs) at frequencies lower than typical in stellar-mass black holes. It is the only ULX from which QPOs have been detected that is in a hard state and, thus, provides a unique opportunity to determine if the QPO frequency is correlated with spectral state as in stellar-mass black holes. We propose simultaneous Chandra and XMM observations to determine the relation between QPO frequency and spectral properties for X41.4+60. This may lead to constraints on the compact object mass.

R.A. Dec. Target Name Det. Grating Exp.Time
9:55:50.20 69:40:47.00 M82 ULX ACIS-S NONE 20
9:55:50.20 69:40:47.00 M82 ULX ACIS-S NONE 20
9:55:50.20 69:40:47.00 M82 ULX ACIS-S NONE 20

Subject Category: BH AND NS BINARIES

Proposal Number: 10400008

Title: INVESTIGATING NEW INTEGRAL SOURCES WITH CHANDRA

PI Name: Adamantia Paizis

We propose to trigger a maximum of 2 Chandra medium (4-12 days) ToO observations on new sources discovered by the INTEGRAL Observatory. We ask for 20 ksec per observation, using HETGS. The scientific aim is to determine the source position with sub-arcsecond accuracy that only Chandra can provide, enabling multi-wavelength follow-up observations (also coordinated within the proposing team), and to obtain the high resolution HETGS X-Ray spectrum, essential to determine the nature of the new source. With this proposal we aim to continue the successful INTEGRAL-Chandra monitoring program started since Chandra AO5.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 New INTEGRAL source 1 ACIS-S HETG 20

Subject Category: BH AND NS BINARIES

Proposal Number: 10400009

Title: High Resolution Spectroscopy of a Black Hole Transient

PI Name: Jon Miller

We propose to continue our ongoing study of Galactic black hole transients in outburst in a streamlined form, via two (2) 30 ksec HETGS observations. This program has revealed relativistic Fe K disk lines, warm-absorber-like disk winds, and now a possible anti-correlation between winds and jets. Observations of a new transient outburst will permit a black hole spin constraint, and test connections between disks, winds, and jets as a function of accretion rate. We will support this program with a global multi-wavelength network of observatories.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Black Hole Transient ACIS-S HETG 30
0:00:00.00 0:00:00.00 Black Hole Transient ACIS-S HETG 30

Subject Category: BH AND NS BINARIES

Proposal Number: 10400046

Title: Chandra follow-up of weak persistent sources found in INTEGRAL maps

PI Name: Jelle Kaastra

We propose to obtain a 1 ksec exposure of up to 2 newly found unclassified INTEGRAL sources which are weak persistent X-ray sources (we exclude from this proposal the bright new transients discovered by INTEGRAL). The unique Chandra positional capabilities will allow for an optical follow-up study. Follow-up observations are of paramount importance for the classification of the sources (e.g. as HMXBs/LMXBs, pulsars (and pulsar wind nebula) or in a few rare cases as AXP/SGR or INS).

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 IGR persisent weak ToO ACIS-I NONE 1
0:00:00.00 0:00:00.00 IGR persisent weak ToO ACIS-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 10400048

Title: Chandra follow-up of weak persistent sources

PI Name: Jelle Kaastra

We propose to obtain short exposures of a sample of unclassified sources which are likely weak persistent X-ray binaries. The unique Chandra positional capabilities will allow for an optical follow-up study. Follow-up observations are of paramount importance for the classification of the sources (e.g. as HMXBs/LMXBs, pulsars or in a few rare cases as AXP or DIM). The ACIS sensitivity for hard sources is best while pile-up is no major concern for source localization.

R.A. Dec. Target Name Det. Grating Exp.Time
11:32:15.70 -53:11:41.00 IGR J11321-5311 ACIS-I NONE 10
17:31:24.70 -28:53:42.00 IGR J17314-2854 ACIS-I NONE 2
17:41:56.00 -28:01:54.50 IGR J17419-2802 ACIS-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 10400049

Title: Chandra LETG observation of an ultra-compact X-ray binary candidate

PI Name: Jelle Kaastra

We propose to obtain a long exposure of the Ultra-compact X-ray binary in Terzan 2.

R.A. Dec. Target Name Det. Grating Exp.Time
17:27:33.20 -30:48:08.00 4U 1724-307 ACIS-S LETG 117

Subject Category: BH AND NS BINARIES

Proposal Number: 10400067

Title: Observe Z sources at High Mass Accretion Rates

PI Name: Claude Canizares

We propose to test a new interpretation that links mass accretion rate to observed spectral changes in Z-sources in a diffwrent way than previously though. Integral part of the test is to catch Z-source on the horizontal branch (HB). There are a few sources where RXTE and previous observatories established a fairly accurate record of how often they appear on a specific spectral branch. 4 observations for 8 ks each has a 50% chance to observe GX 5-1 on the HB.

R.A. Dec. Target Name Det. Grating Exp.Time
18:01:08.20 -25:04:45.00 GX 5-1 ACIS-S HETG 8
18:01:08.20 -25:04:45.00 GX 5-1 ACIS-S HETG 8
18:01:08.20 -25:04:45.00 GX 5-1 ACIS-S HETG 8
18:01:08.20 -25:04:45.00 GX 5-1 ACIS-S HETG 8

Subject Category: BH AND NS BINARIES

Proposal Number: 10400071

Title: Chandra Observations of the Low Mass X-ray Binary 4U 1556-60

PI Name: Claude Canizares

4U 1556-60 is a LMXB in a 9.1 hour orbit, that has been identified (based upon its X-ray colors) as an atoll source, although no bursts have been identified to secure its classification as a neutron star. Spectrally, models that consist of an accretion disk plus a Compton corona, or models that consist of a black body (e.g., neutron star surface emission) plus a hard, but very exponentially cutoff tail, both seem to fit BeppoSAX data equally well. Here we propose to view this system, for nearly one full binary orbit, with the Chandra HETG. We hope to better gauge whether the bulk of the soft emission is coming from a neutron star surface, or the atmosphere of a Comptonized accretion disk.

R.A. Dec. Target Name Det. Grating Exp.Time
16:01:02.30 -60:44:18.00 4U1556-60 ACIS-S HETG 40

Subject Category: BH AND NS BINARIES

Proposal Number: 10400163

Title: X-Ray Jets in Microquasars

PI Name: Stephane Corbel

We propose Target of Opportunity (ToO) observations for detailed studies of X-ray jets from microquasars. We describe our discovery of radio/X-ray jets in two microquasars, why X-ray jets are probably much more common than previously thought, and transient X-ray jets offer an exciting new way to probe the physics of relativistic jets from black holes. The proposed ToO observations are optimized to discover and study (flux evolution, morphology, SED, proper motion, ...) of new X-ray jets from microquasars, triggered by their detection as radio lobes. This will have implications not only for the study of jets from Galactic X-ray binaries, but also for our understanding of relativistic jets from active galactic nuclei (AGN).

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 30
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 40
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 40
0:00:00.00 0:00:00.00 X-ray Jets ACIS-S NONE 40

Subject Category: BH AND NS BINARIES

Proposal Number: 10400165

Title: Transient LMXBs in Globular Clusters: More Numerous Than We Thought?

PI Name: David Pooley

Since the discovery of globular cluster LMXBs in the 1970s, it was assumed that there was only one bright LMXB per cluster. Deep Chandra observations of several globular clusters have revealed that they contain numerous quiescent LMXB systems, any of which could go into outburst. Our observations will determine whether new outbursts from transient LMXBs in NGC 6440, Terzan 5, and Terzan 1 are from the same sources that were previously seen in outburst.

R.A. Dec. Target Name Det. Grating Exp.Time
17:35:47.20 -30:28:54.00 Terzan 1 ACIS-S NONE 10
17:48:04.90 -24:46:45.00 Terzan 5 ACIS-S NONE 10
17:48:52.70 -20:21:37.00 NGC 6440 ACIS-S NONE 2.5

Subject Category: BH AND NS BINARIES

Proposal Number: 10400218

Title: ToO observations of the microquasar GRS 1915+105 in quiescence

PI Name: Paolo Soleri

We propose two Chandra observations (40 ks each) to detect the microquasar GRS 1915+105 in quiescence, should its current 16-year-long outburst end during the 10th Chandra observing cycle. This system has never been observed in quiescence: its properties suggest that its quiescent X-ray flux would be rather high (~ 10^34 erg/s), allowing a measurement of the spectrum and a test of models for quiescent emission in black-hole binaries. In addition, it will be possible to detect a fossil jet similar to that detected in the black hole candidate 4U 1755-33.

R.A. Dec. Target Name Det. Grating Exp.Time
19:15:11.60 10:56:44.00 GRS 1915+105 ACIS-I NONE 40
19:15:11.60 10:56:44.00 GRS 1915+105 ACIS-I NONE 40

Subject Category: BH AND NS BINARIES

Proposal Number: 10400234

Title: Precise Localization of Neutron Star Soft X-Ray Transients

PI Name: Deepto Chakrabarty

We propose to observe four neutron star soft X-ray transients (NS SXTs) in outburst to obtain accurate source positions, continuing a successful multi-cycle program in place since Cycle 6. These positions will allow reobservation of this sources in the X-ray, optical, and infrared bands in order to study their quiescent emission. This program will increase the number of known SXTs with good positions, providing a more uniform sample for future work. We will only trigger our program for sources in crowded or obscured fields where a position from another instrument (e.g., Swift) is not sufficiently constraining.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 NS SXT 1 HRC-S NONE 1
0:00:00.00 0:00:00.00 NS SXT 2 HRC-S NONE 1
0:00:00.00 0:00:00.00 NS SXT 3 HRC-S NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 10400238

Title: ToO observation of a bright Galactic transient discovered by GLAST and Swift

PI Name: Isabelle Grenier

We propose a TOO observation of one bright Galactic transient detected by the GLAST large area telescope, and followed by a Swift-XRT detection. Our goal is to determine the nature of an event similar to the intense, non-blazar, transient that EGRET has detected near the Galactic plane once in its lifetime. The lack of a radio-loud blazar counterpart and of a spacially coincident X-ray binary indicates either a new manifestation of a non-blazar active galaxy lying behind the Milky Way, capable of producing massive gamma-ray flares, or a new facet of Galactic compact objects. A significant XRT detection of an X-ray counterpart will trigger the proposed 30 ks Chandra observation to locate precisely this counterpart, to constrain the X-ray decay time, and to measure the source spectrum.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 GLAST Transient ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 10400252

Title: Chandra observations of newly discovered, nearby, globular clusters in the Galaxy

PI Name: EDWARD CACKETT

We propose short, 10 ksec Chandra observations of two recently discovered nearby (~1.5 kpc) globular clusters FSR 1767 and FSR 584. We will determine their X-ray source population and confirm their globular cluster nature. As they are the two closest globular clusters to the Sun, their proximity gives us an unprecedented look. If we discover any quiescent low-mass X-ray binaries, they will be some of the very closest known to us, enabling a study of their properties in unrivaled detail, especially because of the known distance and reddening.

R.A. Dec. Target Name Det. Grating Exp.Time
17:35:43.00 -36:21:28.00 FSR 1767 ACIS-S NONE 10

Subject Category: BH AND NS BINARIES

Proposal Number: 10400273

Title: Understanding the nature of high inclination low mass X-ray binaries: broad-band and line spectra from A1744-361

PI Name: Tod Strohmayer

We propose to observe the transient, dipping neutron star low mass X-ray binary (LMXB) system A1744-361 during an outburst with the CHANDRA HETGS, and contemporaneously with RXTE. This will be the first observation of A1744-361 with a high resolution spectral instrument. With these observations we will: 1) search for narrow absorption lines for the first time from A1744-361; 2) measure the profile of its broad iron emission line; 3) unambiguously determine the binary orbital period and source position; 4) search for kHz QPOs and burst oscillations. These studies will allow us to further understand the ionized plasma in the immediate environs of A1744-361, and dippers in general. These goals rely on the unique capabilities of CHANDRA (high spectral and angular resolution) and RXTE.

R.A. Dec. Target Name Det. Grating Exp.Time
17:48:13.10 -36:07:58.10 1A 1744-361 ACIS-S HETG 80

Subject Category: BH AND NS BINARIES

Proposal Number: 10400329

Title: Crustal cooling in the neutron star KS 1731-260

PI Name: EDWARD CACKETT

We propose a 60 ksec observation of the quasi-persistent neutron-star low-mass X-ray transient KS~1731-260 in quiescence. The long outbursts of this source heated the neutron star crust out of thermal equilibrium with the core. We have tracked the cooling of the neutron star crust in this object since it went into quiescence. Empirical fits to the data are not yet conclusive as to whether cooling has ceased or may continue. Furthermore, recent theoretical work motivated by our observations predict that the cooling may continue if the neutrino emissivity in the core is high. Our proposed observation will determine whether cooling has continued further constraining models for the neutron star crust and core, and will test whether residual accretion is important.

R.A. Dec. Target Name Det. Grating Exp.Time
17:34:13.40 -26:05:18.70 KS 1731-260 ACIS-S NONE 60

Subject Category: BH AND NS BINARIES

Proposal Number: 10400350

Title: X-ray Column Density Towards The Low Mass X-ray Binary 4U 1608-522

PI Name: Feryal Ozel

We request a 25~ks observation of the low-mass X-ray binary 4U 1608-522 with Chandra HETG in order to measure the interstellar extinction towards the source using absorption edges in its spectrum. The measurement of the column density is critical for two reasons. First, we will employ the independent grating measurement when fitting continuum X-ray spectra of the source to determine the temperature of the neutron star surface. Second, we will employ the extinction measurement to determine the distance to the source using a technique that makes use of red clump stars in the field of view of the source, which we have already extracted from the 2MASS archival data. The ultimate goal is to determine the mass and radius of the neutron star in this binary to a high accuracy.

R.A. Dec. Target Name Det. Grating Exp.Time
16:12:43.00 -52:25:23.00 4U 1608-522 ACIS-S HETG 25

Subject Category: BH AND NS BINARIES

Proposal Number: 10400384

Title: Following a black hole candidate X-ray transient to quiescence

PI Name: Peter Jonker

There is increasing evidence that the quiescent state of BH X-ray binaries is different from the canonical hard state. Our recent Chandra campaigns on BH transient decays suggest that the spectral hardening in the hard state decay stops. This transition has so far not been resolved with enough SN to fully quantify it, but there are strong indications that the spectrum softens during the subsequent decay. We also find evidence that the decay rate varies between sources. Both the decay and spectral evolution can provide important constraints for jet-dominated and ADAF models. We now request 4 instead of 6 simultaneous Chandra/VLA TOO observations. The early part of the decay can be covered with approved Swift ToO and existing radio proposals.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 TOO ACIS-S NONE 7
0:00:00.00 0:00:00.00 TOO ACIS-S NONE 15
0:00:00.00 0:00:00.00 TOO ACIS-S NONE 35
0:00:00.00 0:00:00.00 TOO ACIS-S NONE 100

Subject Category: BH AND NS BINARIES

Proposal Number: 10400393

Title: Looking at the quiescence of the unique system GRB 070610/Swift J195509.6+261406

PI Name: Nanda Rea

We propose for a 68ks ACIS-S observation aimed at determining the nature of the unique system GRB 070610/Swift J195509.6+261406. This very peculiar system, discovered as a long gamma-ray burst (GRB 070610), is most likely a low mass X-ray binary (LMXB) hosting either a neutron star (NS) or a black hole (BH). This is the only LMXB associated with a typical long-duration GRB. The discovery of this source challenges the current picture of long GRBs being all due to cosmological objects. Very deep X-ray observations of this system in its quiescent state are needed in order to disentangle the nature of the system, in particular of its compact object, and then study the expected rate of GRBs with LMXB origin.

R.A. Dec. Target Name Det. Grating Exp.Time
19:55:09.60 26:14:06.70 Swift J195509.6+261406 ACIS-S NONE 68

Subject Category: BH AND NS BINARIES

Proposal Number: 10400405

Title: Crust cooling of bright neutron star transients with long recurrence times

PI Name: Nathalie Degenaar

We propose a series of three Chandra ToO observations of a bright neutron star X-ray transient with a long recurrence time (many years), as soon as the system returns to quiescence following its accretion outburst. Monitoring the thermal relaxation of the accretion-heated neutron star as it cools down in quiescence, allows us to probe various properties of the neutron star crust and core. By comparing these with results of transients that undergo accretion episodes of years to decades, we aim at probing possible physical differences induced by widely different outburst durations. In addition, we will test the recent theoretical conjecture that additional heating occurs in the outer layers of the neutron star crust.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 10400425

Title: Photospheric radius-expansion bursts at high spectral resolution

PI Name: Duncan Galloway

It has been predicted that strong (a few hundred~eV EW) photoionisation edges might be present in the X-ray spectra at the peak of photospheric radius-expansion thermonuclear bursts. We propose to search for such features in bursts from sources uniquely known to exhibit frequent radius-expansion bursts. These observations will result in detection of up to 30 thermonuclear bursts, also providing a high signal-to-noise low-flux state spectrum, as well as allowing a detailed comparison of recurrence time and energetics with numerical ignition models. Detection of discrete features from the burst spectra may lead to highly-sought constraints on the compactness and hence the neutron-star equation of state.

R.A. Dec. Target Name Det. Grating Exp.Time
17:31:57.40 -33:50:05.00 4U 1728-34 ACIS-S HETG 90
17:31:57.40 -33:50:05.00 4U 1728-34 ACIS-S HETG 160
17:38:58.30 -44:27:00.00 4U 1735-44 ACIS-S HETG 130

Subject Category: BH AND NS BINARIES

Proposal Number: 10400447

Title: Crust Cooling of HETE J1900.1-2455 and Swift J1626.6-5156

PI Name: Nathalie Degenaar

We propose Chandra ToO observations of the two neutron star quasi-persistent X-ray binaries HETE J1900.1-2455 and Swift J1626.6-5156 in quiescence. Currently, both sources exhibit an outburst phase that started about 2.5 years ago. By studying the thermal relaxation of the neutron star crust following such a prolonged accretion episode, we can deduce stellar parameters such as the thermal conductivity and distribution of heating sources in the crust, as well as the neutrino emission mechanism operating in the core. Our targets are the only two quasi-persistent X-ray binaries that are known to exhibit X-ray pulsations and have high inferred magnetic fields. We want to explore the observational effects of strong magnetic fields on the thermal evolution of transiently accreting neutron stars.

R.A. Dec. Target Name Det. Grating Exp.Time
16:26:36.50 -51:56:30.60 Swift J1626.6-5156 ACIS-S NONE 20
16:26:36.50 -51:56:30.60 Swift J1626.6-5156 ACIS-S NONE 20
16:26:36.50 -51:56:30.60 Swift J1626.6-5156 ACIS-S NONE 20
19:00:08.70 -24:55:13.70 HETE J1900.1-2455 ACIS-S NONE 20
19:00:08.70 -24:55:13.70 HETE J1900.1-2455 ACIS-S NONE 20
19:00:08.70 -24:55:13.70 HETE J1900.1-2455 ACIS-S NONE 20

Subject Category: BH AND NS BINARIES

Proposal Number: 10400448

Title: Bright edge-on LMXB transients to map ionized disk atmospheres

PI Name: Laurence Boirin

With the discovery of Fe XXV and Fe XXVI lines in several binaries viewed close to the disk plane, XMM and Chandra have revealed the existence of a highly-ionized atmosphere above the accretion disk. We have further demonstrated that the spectral changes during dips from dipping LMXBs, both in the lines and in the continuum could be explained by a decrease in the ionization level of this plasma. We want to investigate the presence of such a highly ionized plasma in four other binaries viewed close to the disk plane should these currently quiet transient sources turn on. We wish to constrain the plasma properties (location in binary, stationary or outflow) as a function of binary parameters (inclination, period) and luminosity.

R.A. Dec. Target Name Det. Grating Exp.Time
17:02:06.50 -29:56:44.10 MXB 1659-298 ACIS-S HETG 90
17:58:40.00 -33:48:27.00 4U 1755-33 ACIS-S HETG 90
21:31:26.20 47:17:02.00 4U 2129+47 ACIS-S HETG 90

Subject Category: BH AND NS BINARIES

Proposal Number: 10400459

Title: Deep search for the pulsars powering the TeV emission of LS I 61+303 and LS 5039

PI Name: Nanda Rea

We propose to observe with Chandsra ACIS in Continuous Clocking mode the two TeV emitters High Mass X-ray binaries LS I 61+303 and LS 5039, for 95 and 71ks, respectively. Aim of these Chandra observations is to address the long-standing puzzle on the nature of the compact objects hosted by these two TeV binaries, searching with unprecedented sensitivity for X-ray pulsations from these putative young rotational powered pulsars. As a nice by product we will also study the one-dimensional X-ray angular distribution searching (or, in the case of LS I 61+303, confirming with higher significance) for extended X-ray emission.

R.A. Dec. Target Name Det. Grating Exp.Time
2:40:31.70 61:13:45.60 LS I 61+303 ACIS-S NONE 95
18:26:15.00 -14:50:53.60 LS 5039 ACIS-S NONE 71

Subject Category: BH AND NS BINARIES

Proposal Number: 10400463

Title: Taking the temperature of the superburster 4U 1608-522 after an outburst

PI Name: Laurens Keek

Superbursts are rare thermonuclear flashes from accreting neutron stars. One condition for ignition is a sufficiently high temperature of the neutron star crust, which is heated during accretion. Most superbursts take place when the neutron star was accreting continuously above 10% of the Eddington limit for more then 10 years. In 2005 a superburst was observed from the transient system 4U 1608-522, when accretion started 55 days earlier. Crustal heating models predict a significantly lower temperature than the superburst models require. If the superburst models are correct in their prediction of a high temperature, crustal cooling is observable after an accretion outburst. We propose to observe 4U 1608-522 two times for 30 ks triggered after an outburst, to measure the cooling rate.

R.A. Dec. Target Name Det. Grating Exp.Time
16:12:43.00 -52:25:23.20 4U 1608-522 ACIS-S NONE 30
16:12:43.00 -52:25:23.20 4U 1608-522 ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 10400480

Title: Quasi-persistent neutron-star X-ray binaries in quiescence

PI Name: Rudy Wijnands

We propose to observe the next (quasi-)persistent neutron-star low-mass X-ray binary that turns off and becomes quiescent. This will provide an excellent opportunity to study the effects of prolonged accretion on the neutron-star properties (i.e., crust and core and thus the properties of ultra-dense matter) and the quiescent properties of low-mass X-ray binaries. Two follow-up observations taken several months later will provide important information about the time evolution of the quiescent properties. In particular, if indeed the quiescent X-rays are emitted by the crust, we will be able to study its evolution in time,thus setting strong constraints on the crust cooling models and the exact structure of the crust.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30
0:00:00.00 0:00:00.00 Quiescent source ACIS-S NONE 30

Subject Category: BH AND NS BINARIES

Proposal Number: 10400502

Title: ToO Observations of New Galactic Gamma-ray Transients Discovered with GLAST

PI Name: Dirk Pandel

The EGRET instrument on board CGRO discovered a unique transient event near the Galactic plane. The nature of this gamma-ray transient could never be established, and no clear counterpart at other wavelengths could be identified. The transient appears to represent a currently unknown class of gamma-ray emitting objects in the Galaxy. The GLAST gamma-ray observatory is expected to discover many new transient gamma-ray sources. Here we propose ToO observations of bright gamma-ray transients discovered by GLAST in the Galactic plane that are not associated with known blazars. The Chandra observations will enable us to precisely locate the transients for multi-wavelength follow-up observations, to determine their X-ray to gamma-ray flux ratio, and to measure their X-ray spectrum.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Transient 1 ACIS-I NONE 5
0:00:00.00 0:00:00.00 Transient 1 ACIS-I NONE 5

Subject Category: BH AND NS BINARIES

Proposal Number: 10400562

Title: Precise Chandra position determinations of compact binary candidates-faint persistent INTEGRAL sources in the bulge

PI Name: Mikhail Revnivtsev

Deep observations of the Galactic Center/Galactic bulge region with the INTEGRAL satellite have provided a statisticaly well-defined sample of faint persistent sources, the majority of which may be X-ray binaries with extremely low mass optical companions feeding the compact object via Roche lobe overflow. The optical emission of these low mass binary system should be extremely faint. Therefore, to make secure associations of an optical object with these X-ray sources, we require very accurate astrometric positions. We propose to obtain ``snapshot'' observations of a sample of such sources with the CHANDRA Observatory to obtain the best possible astrometric positions which will allow us to pursue follow up optical studies of this extremely rare class of objects. (Abridged)

R.A. Dec. Target Name Det. Grating Exp.Time
17:25:25.00 -32:57:10.80 IGR J17254-3257 HRC-I NONE 1
17:35:19.20 -35:39:46.80 IGR J17353-3539 HRC-I NONE 1
17:47:36.20 -22:51:43.20 IGR J17475-2253 HRC-I NONE 1
17:50:32.60 -26:44:38.40 IGR J17505-2644 HRC-I NONE 1
17:58:32.60 -30:57:21.60 IGR J17585-3057 HRC-I NONE 1

Subject Category: BH AND NS BINARIES

Proposal Number: 10400572

Title: Variability in Quiescent Neutron Star Binaries in Dense Globular Clusters

PI Name: Craig Heinke

We propose to re-observe four rich globular clusters (Terzan 5, NGC 6388, NGC 6266, and NGC 6440), which have been previously observed by Chandra and found to contain 5 or more quiescent neutron star binaries with L_X>10^32 ergs/s. Our goal is to measure the years-timescale spectral and luminosity variability of the quiescent neutron star X-ray binaries seen in these clusters. Detecting variability in the thermal component of quiescent X-ray binaries would prove that accretion continues into quiescence, and that the thermal component can be produced by accretion. This study surveys seventeen quiescent X-ray binaries with sufficient sensitivity to draw strong conclusions about low-level accretion and the nature of the thermal component.

R.A. Dec. Target Name Det. Grating Exp.Time
17:48:05.00 -24:46:48.00 Terzan 5 ACIS-S NONE 37
17:48:52.70 -20:21:34.50 NGC 6440 ACIS-S NONE 53

Subject Category: BH AND NS BINARIES

Proposal Number: 10400588

Title: Validating Neutron Star Radius Measurements

PI Name: Deepto Chakrabarty

Spectral analysis of non radius-expansion X-ray bursts and transient neutron star in quiescence were both used to estimate the NSs radii for different sources. The validities of the methods need to be verified by performing the radius measurements on the same source with different methods respectively. Transient type-I X-ray bursters are excellent candidates for testing the consistency between the methods, since they were detected in both bursts and quiescence. Out of 3 candidates: Cen X-4, Aql X-1 and 4U 1608-52, 4U 1608-52 turns out to be the best one due to the lack of archival RXTE burst data for Cen X-4 and the previous reported significant luminosity and temperature variability for Aql X-1 in quiescence. Therefore, we propose a 20 ks Chandra/ACIS-S observation of 4U 1608-52.

R.A. Dec. Target Name Det. Grating Exp.Time
16:12:43.00 -52:25:23.00 4U 1608-52 ACIS-S NONE 20

Subject Category: BH AND NS BINARIES

Proposal Number: 10400599

Title: The brightest unidentified Galactic sources of the new H.E.S.S. survey

PI Name: Omar Tibolla

In a survey of the Galactic plane performed in 2007, the High Energy Stereoscopic System(H.E.S.S.) discovered many new sources and most of them are still unidentified. We propose to use the Chandra X-ray Observatory to perform follow-up observations on two of the brightest newly discovered sources, HESS J1507-622 and HESS J1741-302, to identify the possible X-ray counterparts. Both sources have no clear positional counterparts: HESS J1507-622 does not show any counterpart at all, whereas an offset PWN is one of the possible explanations for HESS J1741-302. The aim is to obtain morphological and spectral information on the possible counterparts in order to understand the emission mechanisms of these 2 sources: the predicted X-ray flux is sufficient for detailed studies of these objects.

R.A. Dec. Target Name Det. Grating Exp.Time
15:07:04.80 -62:20:24.00 HESS J1507-622 ACIS-I NONE 20
17:41:07.20 -30:24:36.00 HESS J1741-302 ACIS-I NONE 20

Subject Category: BH AND NS BINARIES

Proposal Number: 10400649

Title: Completing the Galactic Bulge Survey: categorising the plethora of faint X-ray sources in the Galactic Bulge

PI Name: Peter Jonker

We propose to image an area of 6x1 degrees centered on the Galactic Center at |b|=1.5 degrees: the Galactic Bulge Survey. 50% of this area will be observed in AO9. We here propose to complete the survey. These regions have been selected because of their lower extinction and crowding in the optical and near-infrared than in the Galactic Center area, while still having a high density of X-ray sources. We will detect a plethora of faint X-ray sources that will constrain binary evolution models by way of a number count and by identifying predicted X-ray binary types that so far have eluded identification. We expect to find (quiescent) eclipsing neutron star and black hole LMXBs. These are important for neutron star and black hole mass measurements.

R.A. Dec. Target Name Det. Grating Exp.Time
17:31:57.89 -30:05:02.10 GBS9-10 ACIS-I NONE 2
17:32:33.16 -29:53:18.70 GBS9-10 ACIS-I NONE 2
17:33:02.08 -30:05:42.00 GBS5-10 ACIS-I NONE 2
17:33:08.29 -29:41:34.60 GBS9-10 ACIS-I NONE 2
17:33:37.23 -29:53:57.40 GBS5-10 ACIS-I NONE 2
17:33:43.28 -29:29:49.90 GBS6-10 ACIS-I NONE 2
17:34:12.24 -29:42:12.20 GBS3-10 ACIS-I NONE 2
17:34:18.12 -29:18:04.60 GBS6-10 ACIS-I NONE 2
17:34:47.10 -29:30:26.30 GBS3-10 ACIS-I NONE 2
17:34:52.82 -29:06:18.60 GBS6-10 ACIS-I NONE 2
17:35:21.83 -29:18:39.80 GBS3-10 ACIS-I NONE 2
17:35:27.39 -28:54:32.10 GBS6-10 ACIS-I NONE 2
17:35:56.41 -29:06:52.80 GBS3-10 ACIS-I NONE 2
17:36:01.81 -28:42:44.90 GBS6-10 ACIS-I NONE 2
17:36:30.86 -28:55:05.10 GBS3-10 ACIS-I NONE 2
17:36:36.10 -28:30:57.10 GBS6-10 ACIS-I NONE 2
17:37:05.17 -28:43:16.80 GBS3-10 ACIS-I NONE 2
17:37:10.25 -28:19:08.70 GBS6-10 ACIS-I NONE 2
17:37:39.34 -28:31:27.90 GBS3-10 ACIS-I NONE 2
17:37:44.27 -28:07:19.70 GBS6-10 ACIS-I NONE 2
17:38:13.38 -28:19:38.40 GBS3-10 ACIS-I NONE 2
17:38:16.66 -27:56:01.60 GBS5-10 ACIS-I NONE 2
17:38:44.12 -27:46:24.40 GBS5-10 ACIS-I NONE 2
17:38:47.28 -28:07:48.40 GBS3-10 ACIS-I NONE 2
17:39:13.16 -27:58:44.30 GBS1-10 ACIS-I NONE 2
17:39:17.78 -27:34:33.90 GBS5-10 ACIS-I NONE 2
17:39:46.83 -27:46:53.20 GBS1-10 ACIS-I NONE 2
17:39:51.31 -27:22:42.70 GBS5-10 ACIS-I NONE 2
17:40:20.38 -27:35:01.60 GBS1-10 ACIS-I NONE 2
17:40:24.71 -27:10:51.00 GBS5-10 ACIS-I NONE 2
17:40:53.80 -27:23:09.40 GBS1-10 ACIS-I NONE 2
17:40:57.99 -26:58:58.80 GBS5-10 ACIS-I NONE 2
17:41:27.10 -27:11:16.70 GBS1-10 ACIS-I NONE 2
17:41:31.14 -26:47:06.00 GBS5-10 ACIS-I NONE 2
17:42:00.27 -26:59:23.40 GBS1-10 ACIS-I NONE 2
17:42:04.17 -26:35:12.60 GBS5-10 ACIS-I NONE 2
17:42:33.31 -26:47:29.60 GBS1-10 ACIS-I NONE 2
17:42:37.08 -26:23:18.80 GBS5-10 ACIS-I NONE 2
17:43:06.24 -26:35:35.20 GBS1-10 ACIS-I NONE 2
17:43:09.87 -26:11:24.40 GBS5-10 ACIS-I NONE 2
17:43:39.04 -26:23:40.40 GBS1-10 ACIS-I NONE 2
17:43:42.54 -25:59:29.40 GBS6-10 ACIS-I NONE 2
17:44:11.73 -26:11:45.00 GBS1-10 ACIS-I NONE 2
17:44:15.10 -25:47:34.00 GBS6-10 ACIS-I NONE 2
17:44:44.30 -25:59:49.10 GBS1-10 ACIS-I NONE 2
17:44:47.53 -25:35:38.00 GBS6-10 ACIS-I NONE 2
17:45:16.75 -25:47:52.70 GBS3-10 ACIS-I NONE 2
17:45:49.08 -25:35:55.80 GBS3-10 ACIS-I NONE 2

Subject Category: BH AND NS BINARIES

Proposal Number: 10400745

Title: Hot on the Trail of Circinus X-1: The first X-ray jet from an accreting neutron star

PI Name: Sebastian Heinz

We propose to observe the pc-scale X-ray jet of the accreting neutron star Circinus X-1 during the source's current ultra-deep minimum state to obtain a high-fidelity image of the jet and determine the emission mechanism and spectral parameters of the jet. This will allow us to measure the jet power and to probe the physics of jet formation in neutron stars, and to investigate the interaction of powerful, ultra-relativistic jets from microquasars with the ISM. Reaching our science goals will require a 100ksec ACIS-S target-of-opportunity observation.

R.A. Dec. Target Name Det. Grating Exp.Time
15:20:40.90 -57:10:00.20 Circinus X-1 ACIS-S NONE 100

Subject Category: BH AND NS BINARIES

Proposal Number: 10400827

Title: The cooling neutron star in the super-Eddington accretor XTE J1701-462

PI Name: Jeroen Homan

Observing the cooling of neutron stars that are reheated by accretion provides new insights into neutron star structure. A detailed and efficient study of this cooling requires the use of Chandra. Here we propose to continue our ongoing monitoring campaign of the neutron star binary XTE J1701-462, a unique system that accreted at super- and near Eddington luminosities for more than 1.5 years before recently returning to quiescence. Our goal is to study the cooling of the surprisingly hot neutron star and also the evolution of the enigmatic non-thermal spectral component in unprecedented detail. Our ongoing strategy of frequent observations (every ~2.5 months) is necessary to test the most recent cooling models. We therefore request five ACIS-S observations for a total of 323 ks.

R.A. Dec. Target Name Det. Grating Exp.Time
17:00:58.50 -46:11:08.60 XTE J1701-462 ACIS-S NONE 38
17:00:58.50 -46:11:08.60 XTE J1701-462 ACIS-S NONE 49
17:00:58.50 -46:11:08.60 XTE J1701-462 ACIS-S NONE 62
17:00:58.50 -46:11:08.60 XTE J1701-462 ACIS-S NONE 76
17:00:58.50 -46:11:08.60 XTE J1701-462 ACIS-S NONE 98

Subject Category: BH AND NS BINARIES

Proposal Number: 10400907

Title: Extended emission of microquasar LS 5039

PI Name: Gordon Garmire

Previous ACIS observations of LS 5039 have provided evidence of extended emission which consists of variable and possibly moving knots and a more compact asymmetric structure near the microquasar. However, the observations were either very short or the source was imaged very far off-axis. The poor statistics and the very broad off-axis PSF make it difficult to distinguish between intrinsically extended emission and emission produced by unresolved point sources. In a deeper, on-axis observation we will resolve these ambiguities, understand the nature of the variable knots, measure their motion, and study the asymmetric extended emission in the vicinity of LS 5039. This will help to understand the nature of LS 5039 and the mechanisms responsible for its high-energy emission.

R.A. Dec. Target Name Det. Grating Exp.Time
18:26:15.00 -14:50:53.60 LS 5039 ACIS-I NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500002

Title: Measuring the Magnetic Fields of Central Compact Objects in Supernova Remnants

PI Name: Jules Halpern

X-ray timing studies of two X-ray pulsars in SNRs have detected no braking of their rotation, implying upper limits of 3E11 G on their surface dipole fields, well below those of ordinary young pulsars. We proposed that weak B-fields related to slow natal spin may be the physical basis of the class of Central Compact Objects (CCOs), including the unseen pulsar in SN 1987A. This proposal leverages existing timing data on CCO pulsars to determine if they are spinning down and, if so, to measure their magnetic fields by obtaining coherent timing solutions linking all previous data. Fields as small as 1E10 G can be measured in this way. Alternatively, accretion of supernova debris through a fallback disk may be occurring, which would be detectable as torque noise.

R.A. Dec. Target Name Det. Grating Exp.Time
18:52:38.60 0:40:19.80 PSR J1852+0040 ACIS-S NONE 30
18:52:38.60 0:40:19.80 PSR J1852+0040 ACIS-S NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500017

Title: Chandra Observation of the Southeast Rim of G347.3-0.5

PI Name: Stephen Murray

We propose an ACIS-I observation of the southeast shell of G347.3-0.5 in order to search for sharp nonthermal filaments and to establish a baseline for future expansion measurements.

R.A. Dec. Target Name Det. Grating Exp.Time
17:16:03.00 -39:57:17.00 G347.3-0.5 SE ACIS-I NONE 60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500031

Title: Search for a Period in the Cas-A CCO

PI Name: Stephen Murray

Looking for pulsation's from the Cas-A CCO

R.A. Dec. Target Name Det. Grating Exp.Time
23:23:27.90 58:48:42.50 Cas-A CCO HRC-S NONE 150

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500032

Title: Obtaining spatial and spectral information of a point source in RCW 86

PI Name: Jelle Kaastra

ROSAT found an unresolved source in the supernova remnant RCW 86, which may be the putative neutron star. However, the positional accuracy obtained with ROSAT and XMM-Newton are insufficient to see whether this source has an optical counter part (in which case it is likely to be a star or background source, rather than a neutron star). The source is located off center toward the SW of the remnant. The remnant is bright in the SW, so the source may be closer to the explosion center than expected based on the geometrical center. Chandra observed RCW 86 several times, but the point source was always outside the field of view. In one pointing on the SW, the source fell just in between the ACIS-I ACIS-S chip gaps. Here we propose to observe for a 2000 s in order to obtain an accurate position.

R.A. Dec. Target Name Det. Grating Exp.Time
14:41:51.60 -62:36:19.50 RCW 86 point source ACIS-S NONE 2

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500047

Title: Monitoring the spectral evolution of RXJ0720-3125 and determining its nature

PI Name: Jelle Kaastra

RX J0720.4-3125 belongs to a group of radio-quiet isolated neutron stars, whose spectra are characterized by a blackbody spectrum plus one or more broad absorption features. It is unique in that its blackbody temperature, and the depth of the absorption feature is variable. The cause for this spectral evolution is unclear, but one proposed model is free precession of a neutron star with two hot spots. Observing in this Chandra cycle will complete the coverage of a putative precession cycle with a period of~7-8 yr. This puts the precession hypothesis to the ultimate test.

R.A. Dec. Target Name Det. Grating Exp.Time
7:20:25.00 -31:25:50.20 RX J0720-3125 HRC-S LETG 35
7:20:25.00 -31:25:50.20 RX J0720-3125 HRC-S LETG 35

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500050

Title: Observation of the central compact Object in RX J0852.0-4622

PI Name: Peter Predehl

We propose Chandra observations of the central compact object in RX J0852.0-4622.

R.A. Dec. Target Name Det. Grating Exp.Time
8:52:01.40 -46:17:53.30 CXOU J085201.4-461753 HRC-I NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500065

Title: 2nd Epoch High Resolution Spectra of Cassiopeia A: Plasma Evolution and Doppler Mapping

PI Name: Claude Canizares

We propose to study the evolution of physical conditions in the bright X-ray ejecta of Cassiopeia A using a 2nd HETGS observation. Based on ACIS observations and plasma evolution models we expect to observe variations in the H- and He-like emission lines of Si and S. This will form an 8-year baseline to the 1st HETGS observation in 2001. We will also use these new data in conjunction with the 1st data set to map the 3-dimensional structure of the dynamically important X-ray ejecta.

R.A. Dec. Target Name Det. Grating Exp.Time
23:23:27.90 58:48:42.50 Cassiopeia A ACIS-S HETG 70

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500072

Title: Galactic Supernova Remnant G340.6+0.3

PI Name: Gordon Garmire

We propose a 70 ks Chandra observation of SNR G340.6+0.3. This SNR shows distinctive X-ray line structures between N and S shells. Particularly, in the N region, strongly enhanced X-ray lines from highly ionized S, Ar, and Ca suggest ejecta-dominated emission, reminiscent of Cas A. The proposed Chandra observation is essential to reveal the nature of X-ray emission and the origin of this SNR.

R.A. Dec. Target Name Det. Grating Exp.Time
16:47:38.50 -44:34:07.00 G340.6+0.3 ACIS-I NONE 70

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500078

Title: Long GRB Jet Breaks

PI Name: Gordon Garmire

In the standard fireball model for GRB afterglows, the jet opening angle can be determined from the achromatic jet break time by measuring the light curve until this break occurs. Swift XRT observations have shown that jet breaks are not observed in the first several days or weeks of a typical X-ray afterglow. This has important implications for the derived energetics of the GRB itself that cannot be resolved without a more complete sample of observed jet breaks. We propose to follow 4 carefully chosen long GRB afterglows with late-time Chandra observations in order to search for jet breaks occurring after the Swift observations end.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 GRB 09xxx1 ACIS-S NONE 34
0:00:00.00 0:00:00.00 GRB 09xxx1 ACIS-S NONE 53
0:00:00.00 0:00:00.00 GRB 09xxx2 ACIS-S NONE 34
0:00:00.00 0:00:00.00 GRB 09xxx2 ACIS-S NONE 53
0:00:00.00 0:00:00.00 GRB 09xxx3 ACIS-S NONE 34
0:00:00.00 0:00:00.00 GRB 09xxx3 ACIS-S NONE 53

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500093

Title: Snap-shot survey of compact, radio-bright SNRs

PI Name: Gordon Garmire

We propose to observe a set of radio-bright remnants (SNRs) previously unobserved in X-rays. The SNRs have flat, non-thermal spectra suggesting efficient particle acceleration at the shock front. We also expect to find new pulsars or neutron stars within these remnants. These makes the selected SNRs good candidates for future TeV and GeV detections. The selected SNRs are also compact enough to be imaged within the ACIS-I field of view.

R.A. Dec. Target Name Det. Grating Exp.Time
11:01:30.00 -60:17:40.00 G289.7-0.3 ACIS-I NONE 10
18:10:41.30 -20:42:13.00 G9.95-0.81 ACIS-I NONE 10
19:18:00.20 12:09:50.00 G46.8-0.3 ACIS-I NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500237

Title: Rediscovering the Young Ejecta-Dominated Supernova Remnant G350.1-0.3

PI Name: Patrick Slane

G350.1-0.3 is a small-diameter radio source whose complex morphology left it unclassified for years. Recent XMM observations make it clear that this is a young, bright ejecta-dominated SNR with an associated compact object. X-ray spectra reveal spatial variations in the ejecta abundances and ionization states, but the XMM resolution is insufficient to probe the emission on scales that are most relevant for investigating the ejecta structure. The poorly-measured position of the compact object also results in multiple candidate IR counterparts. We propose a Chandra observation of G350.1-0.3 to provide spectra of the ejecta on small spatial scales, to search for nonthermal filaments that are generally produced in young SNRs, and to obtain a high-precision position for the compact object.

R.A. Dec. Target Name Det. Grating Exp.Time
17:21:03.00 -37:26:50.00 G350.1-0.3 ACIS-S NONE 90

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500274

Title: Chandra/Spitzer ToO Observations of a short-duration gamma-ray burst

PI Name: Kevin Hurley

We propose to observe a short GRB afterglow for 60 ks with Chandra, in conjunction with Spitzer observations. This is a continuation of a Spitzer/Chandra proposal which was accepted for Spitzer cycles AO-3 and AO-4, but never activated due to lack of a suitable burst. We have been granted Spitzer AO-5 ToO time until the cryogen runs out (2009 April 22), and are requesting Chandra time to support these observations. This is a multi-wavelength approach to the problem of understanding the short GRBs, involving two great observatories, as well as numerous ground-based facilities. By measuring the broad-band spectrum of the afterglow at several epochs, we can distinguish between the models proposed for the short bursts.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 SHORT GAMMA-RAY BURST ACIS-S NONE 10
0:00:00.00 0:00:00.00 SHORT GAMMA-RAY BURST ACIS-S NONE 20
0:00:00.00 0:00:00.00 SHORT GAMMA-RAY BURST ACIS-S NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500295

Title: Are all black widows alike?

PI Name: Vyacheslav Zavlin

We propose a Chandra observation of the eclipsing millisecond pulsar J2051-0827 in a 8.6 ks orbital period binary system with a low-mass companion. Optical observations have shown that this system is another example, in addition to PSR B1957+20, of a ``black widow pulsar'', whose relativistic pulsar wind ablates the stellar companion and creates an intrabinary shock. Studying the spectrum and light curve of the X-ray emission from the shocked relativistic wind provides an opportunity to elucidate the properties of the wind and understand the nature of this important class of millisecond pulsars.

R.A. Dec. Target Name Det. Grating Exp.Time
20:51:07.50 -8:27:38.00 PSR J2051-0827 ACIS-S NONE 9
20:51:07.50 -8:27:38.00 PSR J2051-0827 ACIS-S NONE 9
20:51:07.50 -8:27:38.00 PSR J2051-0827 ACIS-S NONE 9
20:51:07.50 -8:27:38.00 PSR J2051-0827 ACIS-S NONE 9
20:51:07.50 -8:27:38.00 PSR J2051-0827 ACIS-S NONE 9

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500298

Title: ToO Observations of Soft Gamma Repeaters

PI Name: Chryssa Kouveliotou

Soft Gamma Repeaters are rare sources of transient burst emission, probably magnetars (i.e. strongly magnetized neutron stars). Each of the SGRs has a persistent X-ray counterpart and some show coherent pulsations. During burst active phases, these counterparts undergo changes in their energy spectrum and pulse properties. Measuring the effects of burst activity are diagnostic of the burst mechanism and SGRs in general. In the event of detection of substantial burst activity from an SGR, we propose to make Chandra ToO observations of any of the four known sources, SGR 1900+14, SGR 1806-20, SGR 1627-41, SGR 0526-66, the two SGR candidates SGR 1801-23 and SGR 2013+34, as well as any newly discovered SGR source.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 NEW SGR ACIS-I NONE 5
5:01:06.70 45:16:34.40 SGR 0501+4516 ACIS-S NONE 40
5:26:01.10 -66:04:38.00 SGR 0526-66 ACIS-S NONE 25
5:26:01.10 -66:04:38.00 SGR 0526-66 ACIS-S NONE 40
16:35:51.80 -47:35:23.30 SGR 1627-41 ACIS-S NONE 25
16:35:51.80 -47:35:23.30 SGR 1627-41 ACIS-S NONE 40
18:00:58.90 -22:56:48.50 SGR 1801-23 ACIS-I NONE 5
18:00:58.90 -22:56:48.50 SGR 1801-23 ACIS-S NONE 40
18:08:39.30 -20:24:39.50 SGR 1806-20 ACIS-S NONE 25
18:08:39.30 -20:24:39.50 SGR 1806-20 ACIS-S NONE 40
19:07:14.30 9:19:20.10 SGR 1900+14 ACIS-S NONE 25
19:07:14.30 9:19:20.10 SGR 1900+14 ACIS-S NONE 40
20:13:46.80 34:20:02.40 SGR 2013+34 ACIS-I NONE 5
20:13:46.80 34:20:02.40 SGR 2013+34 ACIS-S NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500327

Title: An Extensive Study of the Youngest Galactic Supernova Remnant G1.9+0.3

PI Name: Stephen Reynolds

We have recently discovered that the smallest Galactic supernova remnant (SNR) in angular size, G1.9+0.3, is the youngest (known) Galactic SNR, with an age of about 100 years. The X-ray spectrum is lineless, well described by synchrotron emission with the highest rolloff frequency ever reported for a SNR. We propose a 500 ks Large Project observation of this unique object, which fills in a gap between SN 1987A (21 yr old) and Cas A (about 330). We wish to study detailed morphology, to compare with the 3 other Galactic synchrotron- dominated SNRs; spectra, to search for spatial variations and thermal emission; and variability, using this study for the first epoch. This object has enormous potential for the study of SNR hydrodynamics and strong-shock physics.

R.A. Dec. Target Name Det. Grating Exp.Time
17:48:45.00 -27:10:00.00 G1.9+0.3 ACIS-S NONE 90
17:48:45.00 -27:10:00.00 G1.9+0.3 ACIS-S NONE 160

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500344

Title: New Pulsar Identifications of TeV Gamma-ray Sources

PI Name: Jules Halpern

Pulsar wind nebulae are the fastest growing class of Galactic TeV gamma-ray source as many unidentified HESS sources come to be identified with X-ray faint or "offset" PWNe. We propose to search for pulsations from new "TeV selected" pulsars seen in Chandra and XMM images of HESS sources. Determining pulsar ages and spin-down luminosities is important for testing models in which the TeV source is powered not by the supernova shell, but by inverse Compton scattering from high-energy PWNe electrons. Both the luminosity and the spatial extent of the TeV emission should depend on these basic pulsar spin parameters, as would the possible offset of the TeV nebula from the pulsar. These trends can be established by extending the observed sample.

R.A. Dec. Target Name Det. Grating Exp.Time
16:32:09.40 -47:49:03.20 HESS J1632-478 ACIS-I NONE 10
16:35:55.30 -47:19:03.70 HESS J1634-472 ACIS-I NONE 10
17:14:05.70 -38:10:33.90 HESS J1713-381 ACIS-S NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500347

Title: Searching for extragalactic soft gamma-ray repeaters

PI Name: Eran Ofek

The available observational evidence suggests that SGRs are highly magnetized (~10^14 G), young neutron stars. The best path to revealing the origin, evolution and formation channels of SGRs, is a detailed environmental study of a large sample of such objects. Unfortunately, current research of these objects is limited by the small number of known SGRs. We are planing to use GLAST/GBM in concert with Swift/XRT to identify SGR giant flares in nearby galaxies. However, in order to get arcsecond-accuracy locations of these events, which are needed for an environmental study, we ask for Chandra ToO of up to 2 events for which we will detect X-ray afterglows using Swift/XRT.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 ToO ACIS-S NONE 10
0:00:00.00 0:00:00.00 ToO ACIS-S NONE 20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500400

Title: Rapid Observations of Short Gamma-Ray Bursts: Accurate Positions Hold the Key to the Progenitor Population

PI Name: Edo Berger

Only 1/4 of all short GRBs are localized to sub-arcsecond accuracy, required for unambiguous host and redshift identifications, determination of the burst environment (disk, bulge, halo, IGM), and assessment of natal kicks. These properties determine the identity and ages of the progenitors, and the GRB explosion properties. Thus, much of our knowledge depends on a handful of events, which are moreover biased to high density environments by virtue of optical/UV/radio detections. Here we propose to double the fraction of events with sub-arcsecond positions, and overcome the density bias, using rapid Chandra observations of bursts with only Swift/XRT positions (3-6"). Swift data will guarantee Chandra detections at <4 days, and follow-up work will delineate the burst/host properties.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Short-GRB-1 ACIS-S NONE 20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500426

Title: PSRJ1832+0029: a unique target for pulsar emission physics

PI Name: Duncan Lorimer

We have discovered very unusual behavior in PSR J1832+0029, a 533-ms radio pulsar which switches between on and off states on timescales of several hundred days. Remarkably, the pulsar's spin-down rate almost doubles when the radio emission is on. This is even more dramatic than observed for PSR B1931+24 for which no satisfactory theory presently exists. Unlike PSR B1931+24, J1832+0029 is nearby (1.3 kpc) and an excellent target for X-ray detection. Here we request a 20 ks ACIS TOO to study the X-ray emission of PSR J1832+0029 in its off state, triggered by radio monitoring. Together with our recent GO observation, this TOO will help distinguish between radio emission quenching mechanisms that are either intrinsic to the pulsar or caused by accretion from an orbiting companion.

R.A. Dec. Target Name Det. Grating Exp.Time
18:32:50.80 0:29:27.60 PSR J1832+0029 ACIS-S NONE 20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500434

Title: Chandra Observations of New X-ray Supernovae

PI Name: David Pooley

We propose to continue our X-ray studies of Type II and Type Ib/c supernovae (SNe). The Swift satellite has ushered in a new era of studying SNe in the X-rays, obtaining densely sampled X-ray lightcurves for the first time. However, its spatial resolution is often not good enough to separate a SN from nearby sources. We propose short Chandra observations to alleviate this. These observations will assess the X-ray environment of newly discovered Swift SNe to determine any possible source confusion or contamination of the SN flux. Our strategy makes the best use of the capabilities of each observatory.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 SN 1 ACIS-S NONE 10
0:00:00.00 0:00:00.00 SN 2 ACIS-S NONE 10
0:00:00.00 0:00:00.00 SN 3 ACIS-S NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500437

Title: The Spin and Magnetic Moment of the Neutron Star in Cassiopeia A

PI Name: Deepto Chakrabarty

How do the spin and magnetic moment of a neutron star relate to the properties of its massive progenitor and the supernova explosion? The best opportunity to study this question is the Cas A point source, the youngest known (300 yr) Galactic compact object. Its spectrum is unlike the classical Crab pulsar's, but is instead similar to both the more strongly magnetic "magnetars" and more weakly magnetic young pulsars. Much has been inferred about its progenitor and the supernova explosion from detailed studies of the supernova remnant. We propose to obtain a 500 ks HRC-S observation of the Cas A central point source, combining 350 ks of GO time and 150 ks of GTO time, in order to search for coherent pulsations down to the practical sensitivity limit of any current X-ray mission.

R.A. Dec. Target Name Det. Grating Exp.Time
23:23:27.90 58:48:42.50 Cas A CCO HRC-S NONE 30
23:23:27.90 58:48:42.50 Cas A CCO HRC-S NONE 160
23:23:27.90 58:48:42.50 Cas A CCO HRC-S NONE 160

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500440

Title: Imaging the binary plerion

PI Name: George Pavlov

The radio pulsar B1259-63 is in an eccentric binary (e=0.87, P=3.4 yr) with a high-mass Be companion. Being dependent on binary orbital phase, the X-ray emission of this system is believed to be generated in a bow-shock pulsar wind nebula (PWN) formed by colliding winds from the pulsar and the companion. However, this very compact PWN has never been resolved in previous low-resolution observations. Imaging the B1259-63 PWN with the ACIS detector, we expect to detect a PWN tail, similar to those commonly observed behind solitary pulsars moving in the ISM with supersonic speeds, and a pulsar jet. Studying the properties of this unusual PWN will help to understand the nature of stellar and pulsar winds and their interaction.

R.A. Dec. Target Name Det. Grating Exp.Time
13:02:47.60 -63:50:08.70 PSR B1259-63 ACIS-I NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500481

Title: Prompt Study of Burst-Selected Outbursts from AXPs

PI Name: Gian Luca Israel

The discovery of transient AXPs has opened a new perspective in the field confirming that a relatively large number of members of this class has not been discovered yet, and suggesting that others would manifest themself in the future through outbursts. This proposal is aimed at gathering new insights on the physics of AXPs through the study of the very initial phases (within 10days) of their outbursts. In particular, we are proposing to select outbursts from known or still unknown magnetar candidates, to study them through fast-response (within hours) pointed observations and, therefore, to sample the still poorly explored phases of rapid timing/spectral variability just after the onset.

R.A. Dec. Target Name Det. Grating Exp.Time
1:00:43.10 -72:11:33.70 CXOJ0100-7211 ACIS-S NONE 10
1:00:43.10 -72:11:33.70 CXOJ0100-7211 ACIS-S NONE 12
1:00:43.10 -72:11:33.70 CXOJ0100-7211 ACIS-S NONE 13
1:00:43.10 -72:11:33.70 CXOJ0100-7211 ACIS-S NONE 15
1:46:18.40 61:44:39.20 4U0142+614 ACIS-S NONE 10
1:46:18.40 61:44:39.20 4U0142+614 ACIS-S NONE 12
1:46:18.40 61:44:39.20 4U0142+614 ACIS-S NONE 13
1:46:18.40 61:44:39.20 4U0142+614 ACIS-S NONE 15
15:50:54.10 -54:18:23.80 1E1547.0-5408 ACIS-S NONE 10
15:50:54.10 -54:18:23.80 1E1547.0-5408 ACIS-S NONE 12
15:50:54.10 -54:18:23.80 1E1547.0-5408 ACIS-S NONE 13
15:50:54.10 -54:18:23.80 1E1547.0-5408 ACIS-S NONE 15
16:47:10.20 -45:52:16.90 CXOJ1647-4552 ACIS-S NONE 10
16:47:10.20 -45:52:16.90 CXOJ1647-4552 ACIS-S NONE 12
16:47:10.20 -45:52:16.90 CXOJ1647-4552 ACIS-S NONE 13
16:47:10.20 -45:52:16.90 CXOJ1647-4552 ACIS-S NONE 15
17:08:46.90 -40:08:53.00 RXSJ1708-4009 ACIS-S NONE 10
17:08:46.90 -40:08:53.00 RXSJ1708-4009 ACIS-S NONE 12
17:08:46.90 -40:08:53.00 RXSJ1708-4009 ACIS-S NONE 13
17:08:46.90 -40:08:53.00 RXSJ1708-4009 ACIS-S NONE 15
18:18:51.60 -15:59:19.90 AXJ1818.8-1559 ACIS-S NONE 10
18:18:51.60 -15:59:19.90 AXJ1818.8-1559 ACIS-S NONE 12
18:18:51.60 -15:59:19.90 AXJ1818.8-1559 ACIS-S NONE 13
18:18:51.60 -15:59:19.90 AXJ1818.8-1559 ACIS-S NONE 15

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500491

Title: An In-Depth Study of the Nearest Gamma-Ray Bursts

PI Name: Alicia Soderberg

Just a decade ago, astronomers thought stellar core-collapse was primarily a spherical process. Gamma-ray bursts, with collimated jets (powered by a central engine) and at the same time a spherical explosion (supernova) have upset this paradigm. Empirically there appears to be a wide range in the energy of the explosion. This opens up the possibility that "jet-driven" explosions are common in for all supernovae. Here we propose an in-depth study of the nearest gamma-ray bursts. Our synergistic multi-wavelength effort (radio, optical, Swift/XRT and proposed CXO) are designed to extract the true energy of these explosions.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Low-z GRB ACIS-S NONE 15
0:00:00.00 0:00:00.00 Low-z GRB ACIS-S NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500533

Title: A Deep Chandra Observation of Supernova Remnant N49 in the LMC

PI Name: SANGWOOK PARK

N49 is a bright supernova remnant (SNR) in the Large Magellanic Cloud (LMC) showing complex substructures in X-rays, and thus is an excellent laboratory for the detailed study of the shock evolution in a clumpy environment. On the other hand, the origin (core-collapse vs thermonuclear explosion) of this SNR is unknown. Chandra ACIS observations provide a unique opportunity to study the metal-rich ejecta and shocked ISM, which will be useful to reveal the SNR origin and to study the detailed shock evolution process over a wide range of thermal states. Thus, we propose a 120 ks ACIS observation of SNR N49.

R.A. Dec. Target Name Det. Grating Exp.Time
5:25:58.80 -66:05:00.00 N49 ACIS-S NONE 120

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500606

Title: X-ray emission from the double neutron star binary J1537+1155: Powered by the pulsar wind?

PI Name: Oleg Kargaltsev

We have discovered X-ray emission from the double neutron binary (DNSB) J1537+1155 in a 37 ks observation with Chandra. We found that the spectrum and the luminosity of J1537 are very similar to those of the famous double pulsar binary J0737-3039 (the only other DNSB detected in X-rays). However, unlike J0737, in J1537, whose orbit is more eccentric, we found evidence for variability with orbital phase, at a 3 sigma level. If confirmed, such variability proves that a substantial fraction of X-ray emission in DNSB can be produced via the interaction between the pulsar wind and the companion NS. We propose a follow-up 38 ks (one binary orbit) observation to verify the putative variability and test various models for X-ray emission of DNSBs.

R.A. Dec. Target Name Det. Grating Exp.Time
15:37:10.00 11:55:55.50 PSR J1537+1155 ACIS-S NONE 38

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500627

Title: Time Variability of Synchrotron X-ray Emission in SNR RX J1713.7-3946

PI Name: Yasunobu Uchiyama

A recent detection of synchrotron X-ray variability in SNR RX J1713.7-3946 indicates that the interstellar magnetic field can be largely amplified at the expanding shock of a young SNR through magnetohydrodynamic waves generated by cosmic-rays themselves. Here we propose the follow-up Chandra ACIS-I observations of the northwestern shell of RX J1713.7-3946, with 3 x 30 ks monitoring observations, each spaced by 3-4 months. By tracking intra-year variability, we will infer the time history of electron acceleration and cooling. Also, by comparing with the previous observations, we will measure flux changes in lower brightness filaments as well as an expansion angular velocity, thereby testing the origin of TeV gamma-rays and predictions from a shock-acceleration theory.

R.A. Dec. Target Name Det. Grating Exp.Time
17:11:45.50 -39:33:23.20 RX J1713.7-3946 NW ACIS-I NONE 30
17:11:45.50 -39:33:23.20 RX J1713.7-3946 NW ACIS-I NONE 30
17:11:45.50 -39:33:23.20 RX J1713.7-3946 NW ACIS-I NONE 30

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500639

Title: The Luminous Supernova Remnant in NGC4449: Charting the Future for SN 1987A

PI Name: Knox Long

The X-ray luminosity and the optical spectrum of the extraordinary young SNR in NGC4449 have changed since it was discovered in 1978. Here we propose to obtain a second-epoch Chandra ACIS S spectrum and contemporaneous optical (3300-7600 Ang) spectra of the SNR. We will compare the X-ray and optical spectra from different epochs and then model them to develop a more complete understanding of how the shock from this 50-100 year old SN is overrunning the circumstellar medium of the progenitor. We will use this to predict its future evolution and to compare this to the expected future of SN 1987A.

R.A. Dec. Target Name Det. Grating Exp.Time
12:28:10.90 44:06:48.60 NGC4449-SNR ACIS-S NONE 75

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500651

Title: X-ray observations of a TeV-emitting pulsar tail

PI Name: Zdenka Misanovic

A large number of recently detected TeV sources are still unidentified, although the attempts have been made recently to find their X-ray counterparts. For several of these extended TeV sources, young pulsars have been proposed as counterparts, although the pulsars are offset by 10-15 arcmin from the center of the TeV emission. The HESS source J1834-087 coincides with the shell SNR G23.3-0.3, which was proposed as its X-ray counterpart. However, we have recently detected a pulsar candidate and an elongated tail-like structure, possibly a PWN, at the SNR center. We argue that this PWN is a more likely HESS counterpart than the SNR shell. We propose a follow-up observation to confirm this identification.

R.A. Dec. Target Name Det. Grating Exp.Time
18:34:35.10 -8:44:45.80 J1833-087 ACIS-S NONE 50

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500659

Title: TINY HICCUPS TO TITANIC EXPLOSIONS: Tackling Transients in Anomalous X-ray Pulsars

PI Name: Victoria Kaspi

The past decade has seen major progress in neutron star astrophysics, with the discovery of magnetars in general, and the recognition that the Anomalous X-ray Pulsars (AXPs) fall in this class. AXPs have recently revealed surprising and dramatic variability behavior, which theorists have begun to show are highly constraining of physical models of magnetars, including their crusts, atmospheres, coronae and magnetospheres. In this proposal, we request Chandra/ACIS-S Target-of-Opportunity observations of one major Anomalous X-ray Pulsar (AXP) outburst in A10, in order to study in detail the evolution of the spectrum, pulsed fraction and pulse profile, for quantitative confrontation with recently developed models for the structure and electrodynamics of magnetars.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 10
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 15
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 25
0:00:00.00 0:00:00.00 New AXP ACIS-S NONE 40
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 10
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 15
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 25
10:50:08.90 -59:53:20.40 1E 1048.1-5937 ACIS-S NONE 40
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 10
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 15
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 25
18:09:51.10 -19:43:51.70 XTE J1810-197 ACIS-S NONE 40
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 10
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 15
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 25
18:41:19.20 -4:56:12.50 1E 1841-045 ACIS-S NONE 40
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 10
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 15
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 25
18:44:53.00 -2:56:40.00 AX J1845-0258 ACIS-S NONE 40
18:46:24.50 -2:58:28.00 J1846-0258 ACIS-S NONE 10
18:46:24.50 -2:58:28.00 J1846-0258 ACIS-S NONE 15
18:46:24.50 -2:58:28.00 J1846-0258 ACIS-S NONE 25
18:46:24.50 -2:58:28.00 J1846-0258 ACIS-S NONE 40
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 10
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 15
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 25
23:01:07.90 58:52:46.00 1E 2259+586 ACIS-S NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500687

Title: A Deep Cycle 10 Chandra Observation of the Tycho Supernova Remnant

PI Name: John Hughes

We propose to obtain a very deep observation of the Tycho supernova remnant. Our observational goals include investigating the nature and origin of Fe-rich ejecta knots, and studying the spatial, spectral and temporal evolution of the nonthermal emission from the forward shock. Tycho is the ideal remnant for studies of cosmic-ray modified dynamics and for investigating key features of Type Ia supernova physics.

R.A. Dec. Target Name Det. Grating Exp.Time
0:25:19.00 64:08:10.00 Tycho's SNR ACIS-I NONE 110
0:25:19.00 64:08:10.00 Tycho's SNR ACIS-I NONE 160
0:25:19.00 64:08:10.00 Tycho's SNR ACIS-I NONE 160
0:25:19.00 64:08:10.00 Tycho's SNR ACIS-I NONE 160
0:25:19.00 64:08:10.00 Tycho's SNR ACIS-I NONE 160

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500688

Title: Solving the Mystery of Type IIn Supernovae

PI Name: Poonam Chandra

X-ray observations of young supernovae provide unique constraints on the circumstellar density, profile, and elemental composition of the ejecta. Fingerprinting the exploded ejecta composition through X-ray spectroscopy can give clues to the mass and progenitor mass loss history of the exploding star. Both of these will help in understanding the relation of Type IIn progenitors to those of other classes of supernovae.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Type IIn SN ACIS-S NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500693

Title: The Weakly Magnetized Pulsar in Kes 79

PI Name: Jules Halpern

Our X-ray timing studies of two X-ray pulsars in SNRs detected no braking of their rotation, implying upper limits on their surface dipole fields well below those of ordinary young pulsars. We proposed that weak B-fields related to slow natal spin may be the physical basis of the class of Central Compact Objects (CCOs) including Cas A, and the unseen pulsar in SN 1987A. We propose to continue our timing program on the CCO pulsar PSR J1852+0040 in Kes 79 to determine if it is spinning down at all and, if so, to measure its magnetic field by obtaining a coherent timing solution linking all previous data. B-fields as small as 1e10 G can be measured in this way. Alternatively, accretion of supernova debris through a fallback disk may be occurring, which would be detectable as torque noise.

R.A. Dec. Target Name Det. Grating Exp.Time
18:52:38.60 0:40:19.80 PSR J1852+0040 ACIS-S NONE 33
18:52:38.60 0:40:19.80 PSR J1852+0040 ACIS-S NONE 33

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500739

Title: A pulsar wind nebula in G18.95-1.1?

PI Name: Ralph Tuellmann

We propose to observe the central region of the composite SNR G18.95-1.1. Although this object has been extensively observed in the radio regime and to a minor extent in X-rays with ASCA and ROSAT, all searches for a point source have been unsuccessful. Our motivation to observe the G18.95-1.1 with Chandra is to detect an X-ray point source and perhaps non-thermal diffuse emission which could be the putative pulsar and its wind nebula. For this objective, high resolution observations are necessary to pinpoint the location of the source, making Chandra the only X-ray mission which with this study can be carried out.

R.A. Dec. Target Name Det. Grating Exp.Time
18:29:02.70 -12:53:05.10 G18.95-1.1 ACIS-I NONE 45

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500753

Title: Chandra Cycle 10 Spatial and Spectral Monitoring of SNR 1987A

PI Name: David Burrows

Regular monitoring of SNR 1987A, the only supernova remnant in which we can study the early developmental stages in detail, is critical to testing models of remnant evolution, nonequilibrium ionization processes, and thin plasma spectra. SNR 1987A presents a unique opportunity to observe the birth and early evolution of a supernova remnant at high spatial and spectral resolution for the first time. We propose to continue our program of monitoring SNR 1987A in Cycle 10 at a roughly six month period.

R.A. Dec. Target Name Det. Grating Exp.Time
5:35:28.00 -69:16:11.10 SNR 1987A ACIS-S NONE 21
5:35:28.00 -69:16:11.10 SNR 1987A ACIS-S HETG 60
5:35:28.00 -69:16:11.10 SNR 1987A ACIS-S HETG 80

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500758

Title: The High-B Radio Pulsar PSR J1718-3718: A Quiescent Magnetar?

PI Name: Maura McLaughlin

PSR J1718-3718 is a young radio pulsar with a magnetar-strength field. Its likely X-ray counterpart, which we serendipitously detected with Chandra, has a thermal spectrum resembling that of the transient AXP XTE J1810-197 in quiescence. Recently, a magnetar-like outburst was detected from rotation-powered PSR J1846-0248, showing that rotation-powered pulsars can exhibit magnetar behavior and suggesting that such activity may be correlated with magnetic field. With a magnetic field 50% higher than J1846-0258's, J1718-3718 may be a quiescent magnetar. We request ACIS-S observations to search for magnetar-like outbursts, detect X-ray pulsations, measure the pulsed fraction, improve the spectral parameters, and obtain a precise position in order to establish the nature of this source.

R.A. Dec. Target Name Det. Grating Exp.Time
17:18:10.00 -37:18:46.70 J1718-3718 ACIS-S NONE 150

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500817

Title: The Unique Dynamical Vela Pulsar Wind Nebula

PI Name: George Pavlov

Chandra observations of the Vela pulsar-wind nebula (PWN) have revealed intriguing features in its structure and shown that the PWN brightness, shape, and spectrum change on a timescale as short as one week. Taking advantage of the known variability timescale, we propose a series of optimally sequenced observations to understand the PWN topology, dynamics, spectral structure, and interaction with the ambient matter.

R.A. Dec. Target Name Det. Grating Exp.Time
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40
8:35:20.70 -45:10:35.70 Vela PWN ACIS-S NONE 40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500822

Title: The Energetics and Environments of 'Naked' Supernovae

PI Name: Alicia Soderberg

Twenty years have passed since the peculiar class of SNe Ibc were recognized as core-collapse explosions. However, it is only recently that SNe Ibc have enjoyed a surge of interest thanks to their association with GRBs. Today, the most crucial question is whether SNe Ibc and GRBs arise from similar or distinct progenitor systems. Progress requires a detailed study of ordinary SNe Ibc, which out-number GRB-SNe by a factor of 100. Here we propose a focused program that leverages CXO data with those of Swift/XRT and VLA.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 SNIbc ACIS-S NONE 10
0:00:00.00 0:00:00.00 SNIbc2 ACIS-S NONE 10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500824

Title: A Deep HETG Probe of the CSM Interaction in SN1996cr

PI Name: Franz Bauer

SN1996cr is one of the closest and X-ray brightest SNe detected on the sky. Like SN1987A, it appears to have exploded into a wind-blown bubble, sparking a unique temporal evolution wherein its X-ray flux has increased for >8 years now. Serendipitous HETG data allow us to identify several strong, broad, asymmetric emission-line complexes in SN1996cr, although their low-signal leaves much to interpretation. We propose a deep HETG observation of SN1996cr to resolve these emission lines and elucidate their nature (velocity structure, line diagnostics, abundances). It is imperative to observe SN1996cr while it remains bright, as it is the only SN beside SN1987A where such an observation is practical and in many ways is more representative of CSM-interacting core-collapse SNe.

R.A. Dec. Target Name Det. Grating Exp.Time
14:13:10.00 -65:20:44.50 SN1996cr ACIS-S HETG 20
14:13:10.00 -65:20:44.50 SN1996cr ACIS-S HETG 160
14:13:10.00 -65:20:44.50 SN1996cr ACIS-S HETG 160
14:13:10.00 -65:20:44.50 SN1996cr ACIS-S HETG 160

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500874

Title: Identifying the Nearest and Brightest Neutron Stars

PI Name: Derek Fox

Using catalog cross-correlation and over 400 ksec of Swift X-ray and UV observations, we have identified 19 candidate neutron stars from among the 18,811 sources of the ROSAT Bright Source Catalog. With one of these now confirmed as the eighth isolated neutron star, `Calvera,' we request Chandra observations of 16 remaining candidates to collect sub-arcsec positions and modest-quality X-ray spectra. Sub-arcsec X-ray positions are vital to confirm these objects as neutron stars by demonstrating the absence of optical counterparts to faint magnitudes (V > 25 mag). Chandra X-ray spectra will simultaneously yield blackbody temperatures and radii. This single program has the potential to dramatically increase the number of bright, nearby neutron stars that are known.

R.A. Dec. Target Name Det. Grating Exp.Time
0:58:06.60 -46:04:18.80 1RXSJ005807.5-460420 ACIS-S NONE 2
1:32:37.60 -46:12:37.40 1RXSJ013237.7-461231 ACIS-S NONE 2
2:06:17.80 -44:00:44.80 1RXSJ020619.4-440044 ACIS-S NONE 2
4:09:11.80 11:08:35.70 1RXSJ040913.8+110833 ACIS-S NONE 2
4:28:50.00 -46:21:32.90 1RXSJ042849.7-462118 ACIS-S NONE 2
7:04:21.50 -48:26:45.60 1RXSJ070424.9-482639 ACIS-S NONE 2
8:21:24.90 -36:29:11.00 1RXSJ082124.5-362848 ACIS-S NONE 2
8:41:27.40 -10:28:35.10 1RXSJ084127.7-102843 ACIS-S NONE 2
8:48:31.30 -69:41:05.40 1RXSJ084830.4-694114 ACIS-S NONE 2
12:23:07.60 11:00:36.70 1RXSJ122308.4+110054 ACIS-S NONE 2
14:44:00.60 44:31:24.10 1RXSJ144359.5+443124 ACIS-S NONE 2
18:49:18.20 33:33:24.70 1RXSJ184919.2+333310 ACIS-S NONE 2
20:09:13.00 -85:38:46.80 1RXSJ200924.1-853911 ACIS-S NONE 2
21:17:27.80 -10:17:11.50 1RXSJ211727.8-101707 ACIS-S NONE 2
21:27:00.30 10:11:22.30 1RXSJ212700.3+101108 ACIS-S NONE 2
22:02:21.60 1:53:33.10 1RXSJ220221.0+015353 ACIS-S NONE 2

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500924

Title: AO-10 Observations of the Standard Candles Cas A and G21.5-09.

PI Name: CXC Calibration

We continue our annual observations of Cas A and G21.5-09 to monitor the HRC and ACIS.

R.A. Dec. Target Name Det. Grating Exp.Time
18:33:33.50 -10:34:06.70 G21.5-09 HRC-I NONE 10
18:33:33.50 -10:34:06.70 G21.5-09[S3,-120,1.0,0,0] ACIS-S NONE 10
18:33:33.50 -10:34:06.70 G21.5-09[S3,-120,1.0,0,0] ACIS-S NONE 10
18:33:33.50 -10:34:06.70 G21.5-09[S2,-120,5.15,0,8] ACIS-S NONE 10
18:33:33.50 -10:34:06.70 G21.5-09[S2,-120,5.15,0,-2.61] ACIS-S NONE 10
23:23:25.80 58:48:53.40 Cas A[S3,-120,-2.0,0,0] ACIS-S NONE 2
23:23:25.80 58:48:53.40 Cas A[I3,-120,-3.0,3.5,0] ACIS-I NONE 2

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 10500927

Title: AO-10 Calibration Observations of E0102-72

PI Name: CXC Calibration

We have observed the oxygen rich supernova remnant E0102-72 every year since launch to monitor the low energy response of ACIS.

R.A. Dec. Target Name Det. Grating Exp.Time
1:04:02.40 -72:01:55.30 E0102-72[S3,-120,1,0,0] ACIS-S NONE 8
1:04:02.40 -72:01:55.30 E0102-72[S3,-120,1,0,0] ACIS-S NONE 8
1:04:02.40 -72:01:55.30 E0102-72[S3,-120,1,0,0] ACIS-S NONE 8
1:04:02.40 -72:01:55.30 E0102-72[S3,-120,-1,0,0] ACIS-S NONE 8
1:04:02.40 -72:01:55.30 E0102-72[S2,-120,5.15,0,0] ACIS-S NONE 8
1:04:02.40 -72:01:55.30 E0102-72[I2,-120,4.7,2.5,0] ACIS-I NONE 8
1:04:02.40 -72:01:55.30 E0102-72[S1,-120,13.29,0,0] ACIS-S NONE 8
1:04:02.40 -72:01:55.30 E0102-72[I3,-120,-0.5,0.5,0] ACIS-I NONE 8
1:04:02.40 -72:01:55.30 E0102-72[I0,-120,4.7,-5.68,0] ACIS-I NONE 8
1:04:02.40 -72:01:55.30 E0102-72[I1,-120,-4.0,-3.68,0] ACIS-I NONE 8

Subject Category: NORMAL GALAXIES

Proposal Number: 10610309

Title: Bondi accretion and jet power in a complete sample of elliptical galaxies

PI Name: Steven Allen

We have recently discovered a tight correlation between the Bondi accretion rate and kinetic jet power in nearby, X-ray bright elliptical galaxies with active central sources and clear radio bubbles. This correlation implies an instantaneous efficiency of ~2 per cent for the conversion of energy associated with the rest mass of accreted matter into jet power. Here we seek to address the time-averaged efficiency with which energy is fed back into the surrounding gas in elliptical galaxies. We propose Chandra X-ray observations of a complete optical magnitude, X-ray flux, X-ray luminosity and distance-limited sample of nearby elliptical galaxies. Our results will have important implications for models of gas accretion, jet formation and galaxy formation.

R.A. Dec. Target Name Det. Grating Exp.Time
1:23:11.50 33:27:38.00 NGC 499 ACIS-S NONE 40
2:49:33.70 -31:11:21.00 IC 1860 ACIS-S NONE 40
12:15:05.00 33:11:50.00 NGC 4203 ACIS-S NONE 40

Subject Category: NORMAL GALAXIES

Proposal Number: 10610527

Title: The Baryons Content of the Most Massive Spiral Galaxy

PI Name: JOEL BREGMAN

Galaxies are missing most of their baryons when compared to the cosmological baryon to dark matter ratio. The Milky Way is missing at least 70% of its baryons while lower mass galaxies retain less than 10% of their baryons. Theory suggests that these baryons were expelled by intense galactic winds during the primary star formation period. These galactic winds carry gas far beyond the virial radius of small and modest galaxies, but the most massive galaxies should retain much of this gas. We propose to test this picture by searching for the missing baryons surrounding the very massive spiral galaxy, NGC 1961, which has 9 times the stellar content of M31 and with v_rot = 450 km/sec. If successful, we will measure the location and amount of its missing baryons.

R.A. Dec. Target Name Det. Grating Exp.Time
5:42:04.60 69:14:42.00 NGC 1961 ACIS-I NONE 26.6666666666667
5:42:04.60 69:14:42.00 NGC 1961 ACIS-I NONE 26.6666666666667
5:42:04.60 69:14:42.00 NGC 1961 ACIS-I NONE 26.6666666666667
5:42:04.60 69:30:42.00 NGC 1961 ACIS-I NONE 26.6666666666667
5:42:04.60 69:30:42.00 NGC 1961 ACIS-I NONE 26.6666666666667
5:42:04.60 69:30:42.00 NGC 1961 ACIS-I NONE 26.6666666666667

Subject Category: NORMAL GALAXIES

Proposal Number: 10610698

Title: Search for Warm Dark Matter with Chandra Observations of Dwarf Spheroidal Galaxies

PI Name: Michael Loewenstein

The keV sterile neutrino is a dark matter (DM) candidate that may explain pulsar kicks and assist primordial star formation. Their radiative decay produces a photon amenable to X-ray study, and dwarf spheroidal galaxies are ideal targets because of their proximity, high DM density, and absence of additional X-ray sources. We propose Chandra observations of Willman 1 and Ursa Minor to complement our Suzaku program. Willman 1 is one of the faint, DM-dominated dwarf spheroidals newly discovered by the SDSS; none are observed in X-rays. Constraints based on these data enter a significant new regime: non-detections are still of great importance. In the best case, the long sought-after identity of DM will be discovered, pointing the way to physics beyond the Standard Model.

R.A. Dec. Target Name Det. Grating Exp.Time
10:49:21.00 51:03:00.00 Willman 1 ACIS-I NONE 100

Subject Category: NORMAL GALAXIES

Proposal Number: 10610708

Title: Merger-Induced X-ray Emission in the Superantennae

PI Name: Andrew Ptak

We propose a 75 ksec Chandra exposure of one of the brightest nearby ULIRGs: the SuperAntennae. Previous observations revealed that this ULIRG harbors both a powerful starburst and a high-luminosity AGN. Suzaku and XMM-Newton spectra show that both neutral and ionized Fe-K lines are present. An exotic possibility is that some or all of the ionized Fe-K emission is due to the starburst. Here we propose to investigate this diffuse emission and constrain the contributions of the starburst and the AGN. These data will also give the strongest constraints to date for X-ray emission from the secondary nucleus, indicating to what extent a binary AGN may be present. These will provide new constraints for studying the impact of mergers and outflows on galaxy evolution.

R.A. Dec. Target Name Det. Grating Exp.Time
19:31:21.40 -72:39:18.00 Superantennae ACIS-S NONE 75

Subject Category: NORMAL GALAXIES

Proposal Number: 10610747

Title: Dark Matter in Isolated Elliptical Galaxies

PI Name: David Buote

NGC 1521 and IC 4451 are isolated elliptical galaxies recently discovered in an XMM-AO6 pilot survey to search for optimal targets for X-ray studies of dark matter on the galaxy scale. We request modest follow-up observations with Chandra to map their dark matter profiles on the galaxy scale. These observations would be a key addition to the handful of elliptical galaxies which currently possess interesting X-ray constraints on their dark matter properties.

R.A. Dec. Target Name Det. Grating Exp.Time
4:08:18.90 -21:03:07.00 NGC 1521 ACIS-S NONE 50

Subject Category: NORMAL GALAXIES

Proposal Number: 10610775

Title: Infant Ellipticals: the evolution of young merger-remnants

PI Name: Giuseppina Fabbiano

Studies of elliptical galaxies have revealed an intriguing population of young merger-remnant galaxies, which are found to be X-ray faint when compared to mature ellipticals. We propose to investigate the 1-3 Gyr post-merger period with 40 ks Chandra ACIS-S observations of 6 young post-mergers. With these observations, we will probe an important gap in the evolution of ellipticals by a) characterizing the evolution of their X-ray luminosity per unit mass, b) investigating their point source populations and c) observing how the diffuse emission evolves through the regeneration of hot gas halos. Such a study will further our understanding of the evolution of these remnants into ellipticals and will also allow us to investigate the scatter of X-ray properties in young post-mergers.

R.A. Dec. Target Name Det. Grating Exp.Time
11:23:38.80 53:50:32.00 NGC 3656 ACIS-S NONE 60
11:48:46.40 -27:22:45.00 AM 1146-270 ACIS-S NONE 40

Subject Category: NORMAL GALAXIES

Proposal Number: 10610785

Title: Wide, deep and sharp: A comprehensive observation of M82, the exemplar of starburst activity

PI Name: David Strickland

We propose to observe M82, the exemplar of starburst and superwind activity, with a mosaic of deep ACIS-S observations that will cover the starburst region, the galactic disk and much of the extended superwind. The region of highest resolution (FWHM < 1.5") will cover the same field of view as recent deep HST and Spitzer observations. It will be the most data-rich X-ray study of a starburst galaxy ever (>1E6 counts), and will greatly advance our knowledge of the soft X-ray-emitting gas in the superwind, the very hot metal-enriched plasma within the starburst region, and the the X-ray point source population in both the starburst region and the galactic disk. It will further complement the investment made in observing M82 by the other Great Observatories, Hubble and Spitzer.

R.A. Dec. Target Name Det. Grating Exp.Time
9:55:37.60 69:42:25.10 M82-NW ACIS-S NONE 120
9:55:51.30 69:42:51.60 M82-NE ACIS-S NONE 120
9:55:54.20 69:38:57.70 M82-SW ACIS-S NONE 120
9:56:07.80 69:39:34.10 M82-SE ACIS-S NONE 120

Subject Category: NORMAL GALAXIES

Proposal Number: 10610898

Title: A Chandra Study of Field Early-Type Galaxies

PI Name: John Mulchaey

Recent Chandra observations show that a large fraction of early-type galaxies in groups and clusters retain hot gas halos. However, the properties of these halos are consistent with the idea that they have been significantly reduced by environmental effects like ram-pressure stripping and evaporation. To quantify the importance of such mechanisms, we need to compare the properties of ellipticals in rich environments to those in the field where these mechanisms are not expected to be important. Unfortunately, very few field ellipticals have been observed by Chandra. We propose to rectify this situation by observing a sample of 9 nearby field early-type galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
0:15:30.90 17:19:42.30 NGC 57 ACIS-S NONE 10
6:48:19.00 -64:16:23.90 NGC 2305 ACIS-S NONE 10
7:10:32.60 75:19:36.00 NGC 2314 ACIS-S NONE 10
16:19:11.50 57:59:03.20 NGC 6127 ACIS-S NONE 10
22:05:54.80 -50:07:09.60 NGC 7196 ACIS-S NONE 10

Subject Category: NORMAL GALAXIES

Proposal Number: 10620013

Title: X-Rays from Blue Compact Dwarf Galaxies

PI Name: Philip Kaaret

Blue compact dwarf galaxies (BCDs) provide a local analog to the heavy element deficient conditions under which early galaxy formation occurred. All of the low metallicity BCDs observed with Chandra or XMM-Newton show strong X-ray emission. We propose a survey of nearby, low metallicity BCDs which will enable us to determine if the ratio of X-ray luminosity to star formation rate in BCDs is different from that in normal galaxies. Calibrating this relation for conditions similar to early galaxy formation is essential to using X-ray luminosity as a star formation indicator at high redshift.

R.A. Dec. Target Name Det. Grating Exp.Time
8:37:03.30 69:46:29.20 UGC 04483 ACIS-S NONE 3
12:26:16.00 48:29:36.60 Mrk 209 ACIS-S NONE 3

Subject Category: NORMAL GALAXIES

Proposal Number: 10620022

Title: Chandra Observation of a Dark Matter Galaxy in the Virgo Cluster

PI Name: Stephen Murray

A recent HI survey of the Virgo cluster detected several isolated HI clouds. One of these, VIRGOHI21, shows clear evidence of rotation in its HI spectrum: its properties are all typical for normal luminous galaxies. According to the Tully-Fischer relation, the galaxy should be of 12-th mag in V; yet, deep optical follow-up observations reveal a limit consistent with the sky background. VIRGOHI21 thus appears to be the first detection of a population of dark matter halos, or `dark' galaxies, often predicted by theory but whose detection has so far been elusive. We wish to test for the presence of diffuse X-ray emission associated with this dark galactic halo.

R.A. Dec. Target Name Det. Grating Exp.Time
12:17:53.60 14:45:25.00 VirgoH21 ACIS-S NONE 40

Subject Category: NORMAL GALAXIES

Proposal Number: 10620040

Title: Black Hole X-ray Novae in M31

PI Name: Stephen Murray

During A01-9 we found ~20 Black Hole X-ray Novae (BHXN) in M31 using Chandra, and with HST follow-up have estimated orbital periods for 9 of these. Observations are underway with HST to attempt to estimate additional periods. We propose to continue this program, both concentrating our scarce HST resources on a single transient which exceeds typical NS outburst luminosity. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated 790ks (ACIS+HRC) near the M31 bulge, and total Chandra exposure on M31 is now 940ks. By continuing our monitoring program through AO10 we will reach ~890ks on the bulge and >1Msec total Chandra M31 exposure.

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5

Subject Category: NORMAL GALAXIES

Proposal Number: 10620091

Title: NGC 1232 population study

PI Name: Gordon Garmire

To study the source population in this spiral galaxy

R.A. Dec. Target Name Det. Grating Exp.Time
3:09:45.40 -22:34:44.60 NGC 1232 ACIS-I NONE 100

Subject Category: NORMAL GALAXIES

Proposal Number: 10620402

Title: XMMU J134736.6+173403: the brightest ULX known?

PI Name: Peter Jonker

The X-ray source XMMU J134736.6+173403 has recently been discovered. Its X-ray position coincides with two interacting galaxies, one of which is a Seyfert II. The X-ray spectrum rules out an association with the Seyfert II. Carpano et al.(2008) suggest that the source is a foreground LMXB (unrelated to the galaxy-pair). Our optical photometry rule that out since the counterpart to the LMXB should have been detected. We find an extended source in the XMM error circle. Optical spectroscopy shows emission lines such as found in ULX nebulae. If this emission nebula is associated with the X-ray source it implies that it is the brightest known ULX. A 2 ks Chandra observation would provide the accurate source position necessary to assess if the nebula and the X-ray source are associated.

R.A. Dec. Target Name Det. Grating Exp.Time
13:47:36.60 17:34:02.80 XMMU J134736.6+173403 ACIS-S NONE 2

Subject Category: NORMAL GALAXIES

Proposal Number: 10620409

Title: Hyperluminous X-ray sources

PI Name: Timothy Roberts

Hyperluminous X-ray sources (HLXs) are the most luminous of all extra-nuclear X-ray sources in galaxies, with luminosities in excess of 10^41 erg/s. They are also exceedingly rare, with no more than a handful known, and constitute the best candidates amongst the ULX population to host IMBHs. Here, we propose 30-ks Chandra ACIS-S observations of two new candidate HLXs, discovered in the 2XMM serendipitous source catalogue. We will use a combination of the exquisite X-ray imaging of Chandra and X-ray variability data to determine whether the XMM-Newton detections are actually single accreting X-ray sources, and not e.g. an amalgamation of many fainter objects. We will also examine their X-ray spectra to place initial constraints on the accretion states of these extraordinary objects.

R.A. Dec. Target Name Det. Grating Exp.Time
1:19:42.70 3:24:21.00 NGC 470 HLX-1 ACIS-S NONE 30

Subject Category: NORMAL GALAXIES

Proposal Number: 10620535

Title: Chandra Imaging of NGC 922 -- the closest collisional ring galaxy

PI Name: Andrea Prestwich

Ultra Luminous X-ray sources (ULX) have luminosities many times the Eddington limit for a stellar black hole and are associated with massive star formation. This is illustrated by the Chandra image of the Cartwheel, a collisional ring galaxy. The bulk of the X-ray luminosity is produced by 16 ULX co-incident with the outer ring of star formation. We request Chandra and HST time to image another collisional ring galaxy NGC 922. NGC 922 is similar to the Cartwheel, except that it is nearly three times closer and has higher metallicity. We will (1) detect fainter sources than was possible for the Cartwheel, (2) use archival HST data and our new H$\alpha$ images to associate X-ray sources with tracers of star formation and (3) study the effect of metallicity on the formation of ULX.

R.A. Dec. Target Name Det. Grating Exp.Time
2:25:04.40 -24:47:17.00 NGC 922 ACIS-S NONE 10
2:25:04.40 -24:47:17.00 NGC 922 ACIS-S NONE 30

Subject Category: NORMAL GALAXIES

Proposal Number: 10620604

Title: The Most Luminous ULXs

PI Name: Douglas Swartz

We propose a census of the most luminous off-nucleus point-like X-ray sources by observing a sample of 7 high-star-formation-rate Arp interacting galaxy pairs. We expect to discover 30-50 new ULXs with luminosities >5e39 erg/s including as many as 20 above 2e40 erg/s. This represents up to a three-fold increase in the number of known ULX candidates above 1e40. This census will determine to high statistical significance whether or not there exists an upper limit to the luminosity of ULXs or if the power law slope of the luminosity function at lower luminosities continues unabated to higher values. This will have profound implications for the physics underlying the ULX phenomena, in particular for the mass distribution of accreting black holes.

R.A. Dec. Target Name Det. Grating Exp.Time
9:17:26.90 41:59:48.00 Arp 283 ACIS-S NONE 5
13:32:08.90 62:44:02.00 Arp 104 ACIS-S NONE 5
13:39:55.20 0:50:13.00 Arp 240 ACIS-S NONE 20
16:58:27.80 58:56:48.00 Arp 293 ACIS-S NONE 14
23:41:54.10 -3:38:29.00 Arp 295 ACIS-S NONE 20
23:47:01.60 29:28:17.00 Arp 86 ACIS-S NONE 12

Subject Category: NORMAL GALAXIES

Proposal Number: 10620720

Title: Monitoring M31 for BHXNe

PI Name: Michael Garcia

During A01-8 we found ~20 Black Hole X-ray Novae (BHXNe) in M31 using Chandra, and with HST follow-up have estimated orbital periods for 8 of these. Observations are underway with HST to attempt to estimate additional periods. We propose to continue this program concentrating our scarce HST resources on a single transient which exceeds 1e38 erg/s. Only uninterrupted monitoring can yield the duty cycles and long-term light curves of BHXNe (and other variables) in M31. Our GO+GTO programs will have accumulated 790ks (ACIS+HRC) near the M31 bulge by the end of AO9, and total Chandra exposure on M31 is now 940ks. By continuing our monitoring program through AO12 we will reach ~950ks on the bulge and >1Msec total Chandra M31 exposure.

R.A. Dec. Target Name Det. Grating Exp.Time
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5
0:42:44.40 41:16:08.30 M31 ACIS-I NONE 5

Subject Category: NORMAL GALAXIES

Proposal Number: 10620790

Title: Multiwavelength Monitoring of the Spectral and Spatial Evolution of Sgr A* Flares

PI Name: Frederick Baganoff

We propose six 40-ks ACIS-I observations of the Galactic SMBH, SgrA*, with simultaneous NIR, submm, and mm monitoring. Our last two campaigns observed two flares simultaneously in the X-ray, NIR, and submm. We found a possible correlation between the X-ray to NIR flux ratio and the time lag of the submm peak in the two flares that can be explained with an adiabatically expanding relativistic plasma model. This project will test the proposed correlation and the expansion model for flare evolution; test the apparent overabundance of X-ray transients in the central pc; extend our survey of X-ray point sources to fainter fluxes; and measure the proper motion of variable Fe fluorescent features near SgrA* to test whether the SMBH was the irradiator, and hence more luminous in the recent past.

R.A. Dec. Target Name Det. Grating Exp.Time
17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 39.9
17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 39.9
17:45:40.00 -29:00:28.00 Sgr A* ACIS-I NONE 39.9

Subject Category: NORMAL GALAXIES

Proposal Number: 10620799

Title: Completing the Galactic Bulge Latitude Survey (BLS)

PI Name: Jonathan Grindlay

We propose to complete the Chandra Bulge Latitude Survey (BLS) of +/-1.5deg galactic latitude and +/-0.8deg in longitude about the Galactic Center. The BLS has already shown how the X-ray binary content of the Galactic Center Region matches on to that around the nucleus itself with the cycle 7 and 8 coverage obtained (cycle 9 data not yet obtained). The full survey will be analyzed for source spectra and variability and their distributions about the galactic center. IR photometry (JHK) will be completed with ISPI and optical imaging with Mosaic at the CTIO-4m for the full BLS region to constrain the identifications and nature of the sources. The BLS will provide a Chandra Legacy mosaic image and dataset for comparison with complementary surveys in the inner Galactic Bulge.

R.A. Dec. Target Name Det. Grating Exp.Time
17:39:37.80 -28:21:55.10 GBW31 ACIS-I NONE 5
17:39:37.80 -28:21:55.10 GBW31 ACIS-I NONE 5
17:39:37.80 -28:21:55.10 GBW31 ACIS-I NONE 15
17:40:24.50 -28:28:38.50 GBW32 ACIS-I NONE 5
17:40:24.50 -28:28:38.50 GBW32 ACIS-I NONE 5
17:40:24.50 -28:28:38.50 GBW32 ACIS-I NONE 15
17:50:38.00 -29:50:26.10 GBW18 ACIS-I NONE 5
17:50:38.00 -29:50:26.10 GBW18 ACIS-I NONE 5
17:50:38.00 -29:50:26.10 GBW18 ACIS-I NONE 15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700007

Title: The Disk-Jet Connection in Seyfert-1 AGN

PI Name: Jon Miller

A "fundamental plane'' of black hole activity has recently been found, possibly indicating that a specific disk-jet coupling governs all black holes. The potential importance of this relation demands that it be tested rigorously. Correlations between X-ray and radio flux are observed in individual stellar-mass black holes that bolster the robustness of the implied coupling. Similar correlations should hold in all black hole classes on the plane. We propose to make a careful search for correlated variability in the Seyfert-1 galaxy NGC 4051 via 10 short (10 ksec each) and contemporaneous Chandra and VLA observations. NGC4051 displays strong X-ray variability on the timescale of weeks and months, and has a moderately-bright radio core (0.5 mJy at GHz frequencies).

R.A. Dec. Target Name Det. Grating Exp.Time
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S NONE 10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700034

Title: X-ray spectroscopy of a recoiling SMBH candidate

PI Name: Peter Predehl

Recent numerical relativity simulations of coalescencing supermassive black hole (SMBH) binaries predict that SMBHs can receive kicks with velocities up to several thousand km/s due to anisotropic emission of gravitational waves. We have recently found the best candidate todate for such a recoiling SMBH (Komossa et al. 2008). We apply for a 25 ks ACIS-S exposure of this exceptional source.

R.A. Dec. Target Name Det. Grating Exp.Time
9:27:12.60 29:43:44.00 J0927+2943 ACIS-S NONE 24.5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700038

Title: Longterm Monitoring of the Centaurus A Jet, ULXs, and Low Mass X-ray Binary Population

PI Name: Stephen Murray

We propose a 50 ks Chandra/ACIS-S and 4x5 ks ACIS-I observations of the nearby early-type galaxy Centaurus A to monitor the X-ray jet and X-ray binary population. We will search for proper motions of the X-ray knots, and continue our ongoing monitoring the X-ray fluxes and spectra for all the knots in the jet. The energy loss timescale of the synchrotron emission from the jet is of the order of years in the equipartition magnetic fields. In addition, we will observe the two known ULXs to determine their spectral states if active, and study the rest of the X-ray binary population down to an X-ray luminosity of 1E37 ergs/s in the 0.1-10.0 keV band. We will continue our monitoring campaign of the LMXB population to a sensitivity unmatched in any other early-type galaxy.

R.A. Dec. Target Name Det. Grating Exp.Time
13:25:27.60 -43:01:09.00 Centaurus A ACIS-I NONE 5
13:25:27.60 -43:01:09.00 Centaurus A ACIS-I NONE 5
13:25:27.60 -43:01:09.00 Centaurus A ACIS-I NONE 5
13:25:27.60 -43:01:09.00 Centaurus A ACIS-I NONE 5
13:25:27.60 -43:01:09.00 Centaurus A ACIS-S NONE 50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700045

Title: Obtaining High Signal on the Fe-L Unresolved Transition Array

PI Name: Claude Canizares

We request 250 ksec of Chandra HETGS observations of the Seyfert 1 Ark 564. This source is known to have a broad range of ionized absorbers in outflow, seen against the strong soft continuum. The primary goal of these observations is to study the unresolved transition array (UTA) of Fe-L in this source, which provides the highest continuum level at the UTA of any previously studied active galaxy. We will also examine the response of the ionized warm absorber components to rapid variability, which is common in this source, a narrow line Sy1 galaxy. Finally, we will be able to place better limits on any narrow components of the neutral or ionized Fe emission lines.

R.A. Dec. Target Name Det. Grating Exp.Time
22:42:39.40 29:43:31.30 Ark 564 ACIS-S HETG 58
22:42:39.40 29:43:31.30 Ark 564 ACIS-S HETG 90
22:42:39.40 29:43:31.30 Ark 564 ACIS-S HETG 102

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700069

Title: Flaring galaxies with strong emission-line light echo

PI Name: Peter Predehl

We propose two ACIS-S observations of the fading X-ray flare of the galaxy J0952+21 and one ACIS-S observation of the galaxy J1241+44. J0952+21 is unique in showing a very intense optical and NIR emission-line light echo in response to a high-energy flare which we also detected in the optical, NUV and NIR continuum (Komossa et al. 2008). The flare was likely caused by a stellar tidal disruption event. J1241+44 shows a similarly unusual optical emission-line spectrum, and we suspect a similar mechanism at work as in J0952+21.

R.A. Dec. Target Name Det. Grating Exp.Time
9:52:09.60 21:43:13.30 SDSSJ095209.56+214313.3 ACIS-S NONE 17
9:52:09.60 21:43:13.30 SDSSJ095209.56+214313.3 ACIS-S NONE 17
12:41:34.30 44:26:39.20 SDSSJ124134.25+442639.2 ACIS-S NONE 9.5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700080

Title: Studying the Optical and X-ray Emission Regions of Quasar PG 1115+080 by Monitoring Microlensing Events

PI Name: Gordon Garmire

We propose to apply the microlensing method to constrain the spatial structure of the optical and X-ray continuum emission regions of the quasar PG 1115+080 by comparing the flux ratios of the images in the X-ray and optical over several epochs. The differential changes in the flux ratios with wavelength will then constraint the relative sizes of the optical and X-ray emission regions.

R.A. Dec. Target Name Det. Grating Exp.Time
11:18:16.90 7:45:58.00 PG 1115+080 ACIS-S NONE 45

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700081

Title: A Chandra Snapshot Survey of Bright Mini-BAL Quasars

PI Name: Gordon Garmire

We propose to obtain short Chandra snapshots of a a well-defined sample of the optically-brightest radio-quiet quasars (QSOs) in the SDSS Data Release 5 QSO catalog which host CIV broad absorption lines (BALs) with velocity widths between 1000 and 2000 km/s. We will compare the X-ray properties of this ``mini-BAL'' QSO sample to those of unabsorbed QSOs and also to traditional BAL QSOs, which have velocity widths >2000 km/s and are typically strongly X-ray absorbed. This will enable us to extend studies of BAL QSO X-ray properties to a new regime, and will also test whether mini-BAL QSOs are physically similar to BAL QSOs or are a separate population of objects.

R.A. Dec. Target Name Det. Grating Exp.Time
8:01:17.80 52:10:34.50 SDSS J080117.79+521034.5 ACIS-S NONE 4
9:13:42.50 37:26:03.30 SDSS J091342.48+372603.3 ACIS-S NONE 5
9:29:14.50 28:25:29.10 SDSS J092914.49+282529.1 ACIS-S NONE 5
9:32:07.50 36:57:45.50 SDSS J093207.46+365745.5 ACIS-S NONE 5
10:51:58.70 40:17:36.70 SDSS J105158.74+401736.7 ACIS-S NONE 4
10:59:04.70 12:10:24.00 SDSS J105904.68+121024.0 ACIS-S NONE 4
12:03:31.30 15:22:54.70 SDSS J120331.29+152254.7 ACIS-S NONE 4
12:51:32.50 61:10:57.90 SDSS J125132.49+611057.9 ACIS-S NONE 5
12:52:30.80 14:26:09.20 SDSS J125230.84+142609.2 ACIS-S NONE 4
14:25:43.30 54:06:19.30 SDSS J142543.32+540619.3 ACIS-S NONE 4
15:14:51.80 31:16:54.00 SDSS J151451.77+311654.0 ACIS-S NONE 4
22:46:49.30 -0:49:54.30 SDSS J224649.29-004954.3 ACIS-S NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700119

Title: Tracking the Aftermath of the Giant Flare in the M87 Jet

PI Name: Daniel Harris

We request a continuation of our monitoring of the M87 jet. The primary driver is the large X-ray/Optical outburst of the jet knot, HST-1. Both the optical and X-ray intensities peaked at a level 50 times larger than that found in year 2000. We have also now detected superluminal motions of radio components of HST-1 with the VLBA. Many of the characteristics of these events are similar to blazar variability but HST-1 is clearly resolved from the nuclear emission of M87 at a projected distance of 60pc. We are coordinating our program with ground based gamma ray experiments which are monitoring M87, and GLAST should be operational during the AO10 Chandra year, thereby providing the possibility of confirming the predicted inverse Compton emission from the compact component(s) of HST-1.

R.A. Dec. Target Name Det. Grating Exp.Time
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700121

Title: Testing the Radio-loud vs Radio-quiet AGN Dichotomy through the Ionized Circumnuclear Gas in 3C 445

PI Name: Rita Sambruna

The circumnuclear environment of Seyferts contains photoionized gas responsible for complex X-ray absorption/emission. Evidence for such a component in radio-loud AGN is, instead, very rare. And yet, the presence of an ionized, scattering medium is postulated by unification models for these sources, and in models for jet formation. Here we propose sensitive Chandra LETGS observations of 3C 445, a nearby bright Broad-Line Radio Galaxy with a line-dominated soft X-ray spectrum. For the first time in a luminous radio-loud AGN, it will be possible to resolve the soft emission lines, determining the kinematics and location of the photoionized gas, its role in jet collimation and thereby probe the differences in the circumnuclear environment between radio-loud and radio-quiet AGN.

R.A. Dec. Target Name Det. Grating Exp.Time
22:23:49.60 -2:06:12.00 3C 445 ACIS-S LETG 40
22:23:49.60 -2:06:12.00 3C 445 ACIS-S LETG 160

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700125

Title: Short-time monitoring of extreme spectral variations in Seyfert 2s

PI Name: GUIDO RISALITI

We propose two 3 weeks monitoring campaigns of five 10 ks observations, of two Seyfert Galaxies, found in both reflection-dominated and transmission-dominated states in past observations. The aim is to detect such variations on time scales of a few days. A Chandra monitoring analogous to the ones proposed here, performed in 2006 on NGC 1365 provided a spectacular result: a spectral change from Compton-thin to Compton-thick and back to Compton-thin in four days. One more campaign completed just a few days before this deadline on UGC 4203 provided similar results.If found in other sources, these extreme variations would demonstrate that the thick absorber in Seyfert Galaxies is extremely compact (on the spatial scale of the broad line region).

R.A. Dec. Target Name Det. Grating Exp.Time
17:16:59.50 -62:49:14.00 NGC 6300 ACIS-S NONE 10
17:16:59.50 -62:49:14.00 NGC 6300 ACIS-S NONE 10
17:16:59.50 -62:49:14.00 NGC 6300 ACIS-S NONE 10
17:16:59.50 -62:49:14.00 NGC 6300 ACIS-S NONE 10
17:16:59.50 -62:49:14.00 NGC 6300 ACIS-S NONE 10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700149

Title: Exploratory Chandra observations of low-metallicity AGN candidates

PI Name: Trinh Thuan

Metallicity estimates of AGN generally range from solar to supersolar. This is because their massive, bulge-dominated galaxy hosts have processed much of their gas into stars by the present epoch. If AGN metallicity correlates with stellar mass, however, then low-metallicity AGN should reside in low-mass dwarf galaxies. Yet searches in low-mass galaxies have only turned up AGN with slightly subsolar metallicities, at best. So where are the low-metallicity AGN? We propose Chandra observations of four candidates discovered in a large sample of metal-poor dwarf galaxies in the SDSS (<0.1 solar). All are faint (M_g>-19.2), yet show strong broad Halpha (>3e41 erg/s, >2200 km/s) coming from very dense regions (>>1e4/cm3). Chandra will help to secure the AGN nature of these primordial analogues.

R.A. Dec. Target Name Det. Grating Exp.Time
0:45:29.20 13:39:09.00 J0045+1339 ACIS-S NONE 12
10:25:30.30 14:02:07.00 J1025+1402 ACIS-S NONE 5
10:47:55.90 7:39:51.00 J1047+0739 ACIS-S NONE 5
12:22:45.70 36:02:18.00 J1222+3602 ACIS-S NONE 12

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700189

Title: A Co-ordinated Chandra, Suzaku, HST Campaign for NGC3227

PI Name: Martin Elvis

We propose a 200ksec LETGS/HRC observation of NGC3227, a bright, nearby AGN, coordinated with Suzaku monitoring and HST UV spectra. NGC3227 seems to have a distant, dusty, 'lukewarm' Warm Absorber (WA), AND a smaller, high ionization, WA. For these WAs an LETGS grating spectrum will determine: ionization parameter, NH, 'b'-parameter, metal ratios and dust-specific features. The WA location will be known from Suzaku monitoring; together Chandra and Suzaku observations determine the mass loss rate. A joint HST/COS UV spectrum gives absolute metallicity and velocity and covering factor. With the WAs well characterized, NGC3227 joins two other WAs to span M_BH - L/L_Edd space, allowing tests of AGN-galaxy feedback models.

R.A. Dec. Target Name Det. Grating Exp.Time
10:23:30.60 19:51:54.00 NGC3227 HRC-S LETG 40
10:23:30.60 19:51:54.00 NGC3227 HRC-S LETG 160

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700214

Title: AN X-RAY MICROLENSING TEST OF THE AU-SCALE CENTRAL STRUCTURE OF THE QUADRUPLE QUASAR 2237+0305

PI Name: Shin Mineshige

We propose Chandra observations of the gravitationally lensed quasar Q2237+0305 during a microlensing event to reveal its AU scale central structure. The quasar is being monitored from the ground regularly to ascertain the onset of the event. As it occurs, we will measure X-ray spectral variations with Chandra and compare with those taken before and after the event. Since a small region of the quasar accretion disk is strongly magnified during the event, we will be able to limit the mass contained on scales of several AUs and to probe the physical properties of X-ray emitting gas in the vicinity of the black hole. Together with ground-based telescopes, we can resolve the quasar emission regions at multiple wavelengths. This provide a critical test of quasar accretion disk theories.

R.A. Dec. Target Name Det. Grating Exp.Time
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20
22:40:30.30 3:21:31.00 Q2237+0305 (Einstein Cross) ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700224

Title: Probing physical conditions in the extended emission-line regions of powerful radio galaxies: the case of 3C171

PI Name: Martin Hardcastle

Extended optical emission-line regions in which cold gas is ionized by the radio jets are common in high-redshift radio AGN. Our target, 3C171, is the best-studied low-redshift analog of those systems: a region of shock-excited, outflowing gas around the jets has been studied with optical and high-frequency radio polarization data. 'Snapshot' Chandra observations have shown that the environment of the radio galaxy, and potentially the medium responsible for the radio depolarization, are detectable in the X-ray. We propose follow-up Chandra observations that will measure the physical conditions in and around the radio source; coupled with our optical and radio data, this will give a complete picture of the dynamics and energetics of the outflow of cold and warm gas in this object.

R.A. Dec. Target Name Det. Grating Exp.Time
6:55:14.90 54:08:59.40 3C171 ACIS-S NONE 60

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700228

Title: Deep ACIS-S imaging of two X-shaped radio galaxies

PI Name: Christopher Reynolds

X-shaped radio galaxies (XRGs) are often considered to be the smoking gun of a supermassive black hole merger, with the unusual radio morphology attributed to the rapid re-orientation of the AGN jets during the merger event. We request deep (100ks) observations of two XRGs; 4C+00.58 and J1043+3131. Our principal objective is to map the morphology of the hot interstellar/intragroup medium around these radio galaxies that has been previously discovered in our Cycle-9 pilot study, and hence test the "expanding backflow" model of XRG formation which remains a viable alternative to the merging black hole picture. The study proposed here will double the number of XRG that have been imaged deeply in the X-ray band, and provide the most compelling test yet of the backflow model of XRGs.

R.A. Dec. Target Name Det. Grating Exp.Time
16:06:12.70 0:00:27.10 4C+00.58 ACIS-S NONE 100

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700258

Title: Identifying High-Redshift X-ray Jets from Radio-Loud Quasars with Chandra

PI Name: William Brandt

We propose ACIS-S imaging observations of two luminous, radio-loud quasars at z = 3.6 and 4.3. Our Chandra snapshot observations of these targets revealed evidence for X-ray extension, and we aim to identify definitively whether these features are kpc-scale X-ray jets. This program should substantially increase the sample of z > 3.5 quasars with resolved X-ray jets, and we will determine the X-ray extent and morphology of each jet for comparison with VLA data. By comparing the X-ray-to-radio flux ratios of these high-redshift jets with those of closer jets, we will constrain jet X-ray emission mechanisms. These data will also allow effective investigation of intrinsic X-ray absorption in the core spectrum for one of our targets and constrain X-ray variability for both.

R.A. Dec. Target Name Det. Grating Exp.Time
2:34:55.10 -18:06:08.50 PMN J0235-1805 ACIS-S NONE 20
22:19:35.30 -27:19:02.80 PMN J2219-2719 ACIS-S NONE 40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700299

Title: Jets at Intermediate Redshifts: Shedding Light on Emission Mechanisms and Physics

PI Name: Rita Sambruna

We propose observations of a small sample of intermediate-redshift radio jets (2=3-4) tend to confirm the IC/CMB origin of the X-ray emission, the limited morphological information available due to the faintness of the radio emission prevents more detailed studies. Observations at intermediate z will bridge the gap, allowing us to study the role of both the increase of the CMB energy and intergalactic matter densities on the X-ray emission properties and physics of jets.

R.A. Dec. Target Name Det. Grating Exp.Time
7:33:08.80 25:36:25.00 0730+257 ACIS-S NONE 20
8:07:57.50 4:32:35.00 0805+046 ACIS-S NONE 20
13:13:47.30 -27:16:49.00 1311-270 ACIS-S NONE 20
13:21:18.80 11:06:50.00 1318+113 ACIS-S NONE 20
18:35:19.70 61:19:40.00 1834+612 ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700307

Title: Two to Tango? Binary Quasars, their Environments, and the Merger Hypothesis

PI Name: Paul Green

Merger/feedback scenarios linking AGN and galaxy evolution to cosmological structure formation seem wildly successful. Close quasar pairs, which are rare but show a significant excess over the extrapolated large-scale quasar correlation function, are the strongest candidates for merger triggering we have. But a competing theory posits that their excess is only due to their inhabiting locally overdense environments. To address this controversy, we propose to observe 9 close quasar pairs. Their X-ray luminosity, spectra, and broadband SEDs will be compared to hundreds of isolated SDSS quasars already imaged and analyzed. Proposed NOAO 4-meter imaging provides complementary tests for environmental overdensities.

R.A. Dec. Target Name Det. Grating Exp.Time
7:40:13.50 29:26:48.40 SDSSJ0740+2926 ACIS-S NONE 22
8:13:12.60 54:16:49.80 SDSSJ0813+5416 ACIS-S NONE 29.4
11:58:22.80 12:35:18.60 SDSSJ1158+1235 ACIS-S NONE 31.1
12:54:54.90 8:46:52.30 SDSSJ1254+0846 ACIS-S NONE 16.5
14:18:55.40 24:41:08.90 SDSSJ1418+2441 ACIS-S NONE 30.8
15:08:42.20 33:28:02.60 SDSSJ1508+3328 ACIS-S NONE 31.7
16:06:02.80 29:00:49.00 SDSSJ1606+2900 ACIS-S NONE 12.9

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700401

Title: Mothering and smothering: AGN in merging galaxies

PI Name: Diana Worrall

We will study the role of early-stage galaxy mergers in triggering and smothering the AGN-induced ejection of radio plasma, an important heat source in the Universe. Our X-ray and radio observations will allow us to measure the energetics and dynamics of radio-plasma/X-ray interactions, determining the pressures in both components and detecting gas features (e.g., shocks, filaments) that have a morphological association with the radio structures and galaxy motions. We focus on systems whose known properties suggest they are least complicated and which will show different aspects of triggering and smothering.

R.A. Dec. Target Name Det. Grating Exp.Time
0:18:22.60 30:04:45.60 NGC 70 ACIS-I NONE 30
16:15:35.50 19:27:12.00 NGC 6099 ACIS-I NONE 45

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700465

Title: The nature of active nuclei in radio galaxies: observations of the 2Jy sample

PI Name: Martin Hardcastle

We propose Chandra observations that will provide a complete, unbiased sample of radio galaxies drawn from the 2Jy sample, which already has excellent radio, optical and mid-infrared data. Our primary goal is X-ray spectra of the active nuclei: we will detect or put strong upper limits on the heavily obscured continuum emission that indicates a radiatively efficient AGN, and combine this with the uniquely good data at other wavelengths to establish a definitive picture of the ways in which black-hole activity manifests itself in these objects. We will test models in which the optical line emission class indicates powerful, radiatively inefficient AGN. We will also constrain the hot-gas environments of our targets and test models that relate accretion mode and environment in radio AGN.

R.A. Dec. Target Name Det. Grating Exp.Time
0:46:17.80 -42:07:51.40 PKS 0043-42 ACIS-S NONE 20
2:15:37.50 -12:59:30.50 PKS 0213-13 ACIS-S NONE 20
18:43:14.60 -48:36:23.30 PKS 1839-48 ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700504

Title: The multi-faceted X-ray activity of low-redshift active galaxies

PI Name: Mark Birkinshaw

We propose ACIS-I observations of Chandra-unobserved low-redshift 3CRR active galaxies and their environments. The data will complete Chandra observations of 3CRR at z < 0.1, making the sample useful for statistical studies. Only Chandra can resolve the multiple components of these sources, as is needed for an improved understanding of source physics and gas heating. The imaging and spectroscopy of cores, jets, hot spots, and atmospheres will be of permanent legacy value. We will use the data to investigate particle acceleration, interactions between radio plasma and the ISM and IGM, the emission mechanisms of hot spots, and AGN fueling. Comparison with our complete Spitzer coverage and HST images will aid interpretation. The dataset will be made public immediately.

R.A. Dec. Target Name Det. Grating Exp.Time
1:12:02.20 49:28:35.00 3C 35 ACIS-I NONE 25
3:58:54.40 10:26:03.00 3C 98 ACIS-I NONE 30
7:47:57.90 55:45:46.30 DA 240 W ACIS-I NONE 12.5
7:47:57.90 55:45:46.30 DA 240 W ACIS-I NONE 25
7:49:15.90 55:52:10.30 DA 240 E ACIS-I NONE 12.5
7:49:15.90 55:52:10.30 DA 240 E ACIS-I NONE 25
9:49:46.00 73:14:23.10 4C 73.08 ACIS-I NONE 30
10:05:24.20 34:59:11.40 3C 236 W ACIS-I NONE 10
10:05:24.20 34:59:11.40 3C 236 W ACIS-I NONE 10
10:05:24.20 34:59:11.40 3C 236 W ACIS-I NONE 30
10:06:18.40 34:51:56.40 3C 236 C ACIS-I NONE 13.3333333333333
10:06:18.40 34:51:56.40 3C 236 C ACIS-I NONE 13.3333333333333
10:06:18.40 34:51:56.40 3C 236 C ACIS-I NONE 40
10:07:12.60 34:44:41.40 3C 236 E ACIS-I NONE 10
10:07:12.60 34:44:41.40 3C 236 E ACIS-I NONE 10
10:07:12.60 34:44:41.40 3C 236 E ACIS-I NONE 30
12:29:52.30 11:40:38.90 1227+119 ACIS-I NONE 30
15:51:43.20 20:04:17.70 3C 326 W ACIS-I NONE 17.5
15:51:43.20 20:04:17.70 3C 326 W ACIS-I NONE 35
15:52:09.20 20:05:23.70 3C 326 ACIS-I NONE 25
15:52:09.20 20:05:23.70 3C 326 ACIS-I NONE 50
18:38:26.30 17:11:49.70 3C 386 ACIS-I NONE 30
22:49:54.70 11:36:30.10 NGC 7385 ACIS-I NONE 40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700550

Title: Chandra ToO Observations of Flaring GLAST Blazars

PI Name: Greg Madejski

We propose for two 25 ks ToO observations of blazars (or any other high latitude source) undergoing an exceptional flare in the GLAST gamma-ray band. We intend to use Chandra only if other facilities such as RXTE or Suzaku are not sufficiently sensitive, or cannot reach the source because of the Solar angle or scheduling constraints; we estimate the probability of a Chandra trigger about 50 pct. The resulting X-ray data - both the spectrum and variability information - will be indispensable to deterine the emission mechanisms, and by extension, allow inferences about the structure of the sub-parsec jet, and connection of the jet to the accretion disk and the supermassive black hole.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 GLAST BLLAC ACIS-S NONE 25
0:00:00.00 0:00:00.00 GLAST BLLAC ACIS-S NONE 25

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700575

Title: Feedback in Seyfert galaxies: shocks, jets and winds

PI Name: Judith Croston

Disentangling the feedback contributions from AGN outbursts, star formation and galaxy winds to the energetics of gas in galaxies, galaxy groups and clusters is a key problem in galaxy evolution. Recent work has shown that kpc-scale radio bubbles connected to an active nucleus can be found in a wide range of host-galaxy environments, including spiral galaxies. We recently carried out a Chandra observation of one such system NGC 6764, finding X-ray luminous hot gas associated with the radio bubbles. Here we propose to observe two further Seyfert galaxies with kpc-scale radio bubbles, NGC 3367 and Markarian 6, in order to determine whether shock heating is ubiquitous in these systems, and to disentangle the effects of AGN, star formation activity and superwinds.

R.A. Dec. Target Name Det. Grating Exp.Time
6:52:12.30 74:25:36.80 MKN 6 ACIS-S NONE 75

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700584

Title: Deconstructing AGN X-ray Spectra - Time for a Paradigm Shift?

PI Name: Tracey Turner

We aim to detect and measure the ionization state and outflow velocities in the well-studied low-BH-mass AGN NGC 4051. We have been granted a 340 ks Suzaku observation to study continuum and low-resolution line spectral variability; HETG spectroscopy complements this by isolating narrow absorption lines arising from key zones of gas, allowing us to measure ionization, column and outflow velocities of the multiple ionized zones. A moderately ionized zone in particular can mimic the appearance of a broad Fe emission line but can be revealed by 6.5 keV Fe Kalpha absorption, for which there is already tentative evidence. A 320 ks HETG exposure will provide powerful diagnostic signatures across a wide range of ionisation. We also request HST time for tie-in UV spectroscopy.

R.A. Dec. Target Name Det. Grating Exp.Time
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S HETG 160
12:03:09.60 44:31:52.80 NGC 4051 ACIS-S HETG 160

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700652

Title: Luminous Compton-thick QSOs at z~1

PI Name: Roberto Gilli

Over the last few years, an increasing number of results have suggested that heavily obscured, Compton-Thick (CT) AGN are abundant both in the nearby and in the distant Universe. At high redshifts and luminosities, however, sampling the population of CT AGN is difficult because of their faintness and low density on the sky. We propose a program consisting of short exposures (10 ks each) to observe 16 luminous QSOs at z~1 which are likely to suffer from heavy obscuration. The targets have been selected from the SDSS DR6 based on their strong [NeV]3427 emission. The proposed observations will determine the average obscuration properties of these objects, placing constaints on the population of CT QSOs at z~1.

R.A. Dec. Target Name Det. Grating Exp.Time
3:42:22.50 -5:57:27.90 SDSS J034222.54-055727.9 ACIS-S NONE 10
8:08:59.30 20:47:11.80 SDSS J080859.33+204711.8 ACIS-S NONE 10
9:26:40.70 2:36:28.70 SDSS J092640.67+023628.7 ACIS-S NONE 10
10:46:03.20 7:19:07.20 SDSS J104603.17+071907.2 ACIS-S NONE 10
10:59:51.40 30:18:17.40 SDSS J105951.36+301817.4 ACIS-S NONE 10
12:58:48.60 12:05:31.10 SDSS J125848.58+120531.1 ACIS-S NONE 10
14:55:03.90 51:55:39.90 SDSS J145503.94+515539.9 ACIS-S NONE 10
16:51:58.60 43:25:08.60 SDSS J165158.61+432508.6 ACIS-S NONE 10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700657

Title: Using Chandra to Understand the TeV Emission from M87

PI Name: Daniel Harris

With observational data from VERITAS, HESS, and MAGIC, it appears that there are TeV 'high states' for M87 which can last a few weeks and provide many nightly detections at a level significantly higher than the 'quiet state'. Because we model the TeV emission as IC scattering by the same electrons responsible for X-ray synchrotron emission, we expect that TeV variability will be mirrored in the UV and X-rays. To determine the location of TeV emission and to obtain quasi simultaneous photometry to refine sync/IC calculations, we request a Chandra TOO program on M87 to be triggered by the TeV 'high state' condition. We request a maximum of 90 ks, divided into 5ks observations so as to construct a lightcurve for comparison with those obtained by the Cherenkov observatories.

R.A. Dec. Target Name Det. Grating Exp.Time
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5
12:30:49.00 12:23:30.00 M87 ACIS-S NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700660

Title: Evolution of Activity in Massive Gas-rich Mergers: The X-ray Perspective

PI Name: Sylvain Veilleux

As the final element of QUEST, a multiwavelength program on local massive gas-rich mergers, we propose to obtain ACIS-S data on all z < 0.15 ULIRGs with no obvious signs of AGN activity in deep Spitzer MIR spectra but with reliable spectroscopically-determined host (hence black hole) masses. The main goal is to investigate the evolution of nuclear activity in advanced mergers beyond the first peri-passage. We wish to study in detail the basic physical processes involved in creating massive early type hosts, and feeding embedded massive BHs in major galaxy mergers. This is an important question since about 50% of cosmic star formation at high-z and most of the big BHs appear to be formed in this process. Here we first propose a snapshot survey of the 10 sources without any X-ray data.

R.A. Dec. Target Name Det. Grating Exp.Time
0:11:43.30 -7:22:06.80 F00091-0738 ACIS-S NONE 15
0:48:07.00 -28:48:14.20 F00456-2904 ACIS-S NONE 15
1:19:07.70 -8:29:10.70 F01166-0844 ACIS-S NONE 15
2:04:27.30 -20:49:41.30 F02021-2103 ACIS-S NONE 15
9:06:34.10 4:51:26.00 F09039+0503 ACIS-S NONE 15
11:12:03.30 -2:54:24.10 F11095-0238 ACIS-S NONE 15
15:48:56.80 -4:59:33.70 F15462-0450 ACIS-S NONE 15
21:23:29.10 -5:06:59.60 F21208-0519 ACIS-S NONE 15
21:35:45.90 -23:32:34.70 F21329-2346 ACIS-S NONE 15
23:25:56.30 10:02:50.20 F23234+0946 ACIS-S NONE 15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700662

Title: Testing the Radiative-Driving Hypothesis of Quasar Outflows

PI Name: Rajib Ganguly

Outflows are seen prominently in the UV spectra of Broad Absorption Line (BAL) QSOs. Radiatively-driven outflows predict that the velocity (vmax) should scale with UV luminosity (LUV). Observations show that LUV only provides a cap to vmax. One explanation is that the X-ray absorbing gas in an individual quasar provides a shield that regulates its radiative driving efficiency. That is, quasars with thick shields can accelerate gas to higher vmax. To test this hypothesis, we propose snapshot (8ks) ACIS observations of 12 carefully-selected BALQSOs to investigate the relationship between vmax and X-ray absorption, and thus the role of shielding in radiative acceleration.

R.A. Dec. Target Name Det. Grating Exp.Time
8:10:11.80 34:58:57.70 SDSS J0810+34585 ACIS-S NONE 8
8:54:36.40 2:20:23.60 SDSS J0854+0220 ACIS-S NONE 8
11:28:20.80 -1:14:41.30 SDSS J1128-0114 ACIS-S NONE 8
11:34:06.90 52:59:59.00 SDSS J1134+5259 ACIS-S NONE 8
11:50:46.50 65:44:28.90 SDSS J1150+6544 ACIS-S NONE 8
12:02:08.90 51:19:23.00 SDSS J1202+5119 ACIS-S NONE 8
14:13:50.20 -2:38:26.10 SDSS J1413-0238 ACIS-S NONE 8
15:20:16.50 -0:44:16.70 SDSS J1520-0044 ACIS-S NONE 8
15:39:52.20 42:03:56.30 SDSS J1539+4203 ACIS-S NONE 8
15:45:28.00 55:55:12.80 SDSS J1545+5555 ACIS-S NONE 8
16:44:07.70 41:57:48.40 SDSS J1644+4157 ACIS-S NONE 8
17:18:31.70 59:53:09.40 SDSS J1718+5953 ACIS-S NONE 8

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700664

Title: Exploring the X-ray - TeV connection in BL Lacs on short timescales

PI Name: Sarah Kaufmann

We propose to perform one ToO for a full night (30 ks) of simultaneous observation with Chandra and H.E.S.S., on a flaring TeV blazar with flux high enough to constrain both spectra on hour timescales or less. Our goal is to investigate with unprecedented detail the intra-night and sub-hour variability in TeV blazars, as strikingly revealed by recent H.E.S.S. observations on PKS 2155-304 (few minutes flux doubling timescales). The aim is to shed light on the origin of the gamma-ray emission and on the relation between X-ray and gamma-ray emissions.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 flaring TeV BLLac ACIS-S NONE 30

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700666

Title: Completing a Flux-limited Survey for X-ray Emission from Radio Jets

PI Name: Herman Marshall

We propose to obtain high resolution X-ray images for a well defined complete sample of quasar jets. Selection is based on the flux density in extended emission which should give a sample that spans a wide range of jet physical conditions. We will find good targets for detailed X-ray imaging followup so that we can measure the spectral energy distributions and then test models such as the synchrotron and synchrotron self-Compton emission mechanisms. Shallow surveys provide an efficient use of Chandra observing time for this purpose because little time is given to targets that are too weak for effective followup. Furthermore, for a small initial observing time, it is more straightforward to estimate exposure times for followup observations.

R.A. Dec. Target Name Det. Grating Exp.Time
1:46:48.70 -52:02:33.70 0144-522 ACIS-S NONE 6
2:59:27.10 7:47:39.60 0256+075 ACIS-S NONE 6
4:03:53.70 -36:05:01.90 0402-362 ACIS-S NONE 6
5:11:00.50 -22:01:55.30 0508-220 ACIS-S NONE 6
7:10:46.10 47:32:11.10 0707+476 ACIS-S NONE 6
7:50:52.00 12:31:04.80 0748+126 ACIS-S NONE 6
9:03:04.00 46:51:04.10 0859+470 ACIS-S NONE 6
9:56:49.90 25:15:16.00 0953+254 ACIS-S NONE 6
11:18:57.30 12:34:41.70 1116+128 ACIS-S NONE 6
13:08:40.40 -82:59:34.20 1303-827 ACIS-S NONE 6
15:04:25.00 10:29:39.20 1502+106 ACIS-S NONE 6
16:26:06.00 -29:51:27.00 1622-297 ACIS-S NONE 6
18:24:07.10 56:51:01.50 1823+568 ACIS-S NONE 6
22:32:36.40 11:43:50.90 2230+114 ACIS-S NONE 6

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700667

Title: Probing X-Ray Jet Emission Mechanisms in a Complete Blazar Sample

PI Name: Preeti Kharb

We propose deep (70 ksec) followup Chandra X-ray observations and new HST WFPC2/F450W observations of two quasars belonging to the complete flux-limited MOJAVE Chandra blazar sample. These two quasars have HST WFPC2/F702W data available in the archive. Combining the existing optical and radio data with the new Chandra and HST data at an additional optical band we aim to construct asignificantly more accurate multi-waveband (four frequency) spectral energy distributions for distinct knots in the jets. This will serve as a first step towards resolving longstanding ambiguities surrounding the primary X-ray emission mechanisms in a well-defined sample of powerful FR-II class jets.

R.A. Dec. Target Name Det. Grating Exp.Time
1:08:38.80 1:35:00.30 0106+013 ACIS-S NONE 70
16:42:58.80 39:48:37.00 1641+399 ACIS-S NONE 70

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700678

Title: The Circumnuclear X-Ray Environments of CSS Radio Sources

PI Name: Daniel Evans

We propose the first Chandra/ACIS-S observations of the kpc-scale circumnuclear environments in a sample of Compact Steep Spectrum (CSS) radio sources, the likely progenitors of powerful radio galaxies. Their small-scale radio ejecta mean we can simultaneously examine the roles of AGN photoionization and jet-environment interactions on gas both interior and exterior to the radio lobe. We will explore the relationship between the X-ray environment, extended [O III] NLR, and radio outflow. We will then (1) determine the role of jet-environment interactions in imparting energy into the ambient ISM, (2) assess the energetic contribution from photoionizing AGN radiation, and (3) compare the circumnuclear environments in CSS sources with those in other radio-loud and radio-quiet AGN.

R.A. Dec. Target Name Det. Grating Exp.Time
12:06:24.70 64:13:36.90 3C 268.3 ACIS-S NONE 70
14:21:05.60 41:44:48.60 3C 299 ACIS-S NONE 50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700684

Title: Chandra survey of Polar Broad Absorption-Line Quasars

PI Name: Kajal Ghosh

We have detected polar broad absorption-line quasars from their radio-core variabilities. Recent X-ray observations of two polar LoBALQSOs suggest that they may have different X-ray properties from other BALQSOs: their X-ray absorbing columns are much smaller compared to that of non-polar LoBALQSOs with Compton-thick absorbing columns and the polar LoBALQSOs may have different type of outflow. Here we propose snapshot survey (6~ks exposure each) of 10 polar BALQSOs to determine if this is the case. Determining if polar BALQSOs are qualitatively different from the rest of the BALQSO population would be a very significant result.

R.A. Dec. Target Name Det. Grating Exp.Time
8:16:19.00 48:23:28.40 SDSS J081618.99+482328.4 ACIS-S NONE 6
8:28:17.20 37:18:53.70 SDSS J082817.25+371853.7 ACIS-S NONE 6
10:41:06.10 14:44:17.40 SDSS J104106.05+144417.4 ACIS-S NONE 6

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700689

Title: Chandra X-ray Scrutiny of New Radio-Shy BL Lac Candidates

PI Name: Scott Anderson

BL Lacs are rare X-ray emitting AGN, oft-unified with FR I radio galaxies viewed along a jet. Despite decades of study it is still uncertain whether all BL Lacs are strong radio sources: venerable BL Lac samples include just dozens of objects, too few to test for an even rarer radio-quiet subset. But, recent large area surveys have found a few intriguing BL Lacs lying on the radio faint tail; SDSS alone provides hundreds of new BL Lacs, with several dozen potentially radio-shy cases. We propose brief Chandra images of 3 such BL Lac candidates having deep VLA data but lacking X-ray constraints. Chandra scrutiny is a prerequisite to claiming them as radio quiet BL Lacs; confirmation would provide fascinating challenges to our understanding of this peculiar AGN subclass.

R.A. Dec. Target Name Det. Grating Exp.Time
21:15:52.90 0:01:15.50 SDSS J211552.88+000115.5 ACIS-S NONE 9.4
22:47:49.60 13:42:48.20 SDSS J224749.55+134248.2 ACIS-S NONE 3.2
23:24:28.40 14:43:24.40 SDSS J232428.43+144324.4 ACIS-S NONE 4.9

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700699

Title: The Structure and Physics of the Youngest Radio Galaxies

PI Name: Eric Perlman

We propose to obtain X-ray images and spectra of two of the nearest and X-ray brightest compact symmetric objects. These objects are radio sources which have begun ejecting radio plasma within the last $\sim 10000 years$. The purpose of these observations is to discover their X-ray structure, measure their X-ray spectra and test the Wilson-Colbert hypothesis regarding the formation of radio-loud AGN. CSOs are ideal targets for this test because they are very small ($\sim 100pc$) and very young. By targeting the very nearest objects we assure ourselves of the highest possible physical resolution. We are particularly looking for binary black holes (possibly found for one of our objects already) and/or nascent NLRs.

R.A. Dec. Target Name Det. Grating Exp.Time
11:48:50.30 59:24:55.90 NGC3894 ACIS-S NONE 40
14:59:24.80 -16:41:35.00 NGC 5793 ACIS-S NONE 32

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700750

Title: Mapping the Centaurus A Nuclear Region

PI Name: Margarita Karovska

We propose to carry out high-angular resolution HRC-I observations of the early-type galaxy Centaurus A containing the nearest radio-bright AGN, and map the circumnuclear X-ray emission within a radius of 3". Cen A provides a unique opportunity to carry out sub-arcsecond resolution X-ray imaging of the nuclear region, which will result in key constraints on the AGN unified model and the putative torus of gas and dust surrounding the nucleus and the accretion disk. Our goal is to confirm the possible detection of extended emission in the circumnuclear region using early HRC-I observations, obtain the first unambiguous X-ray image of a resolved torus structure in an AGN, and search for jet--environment interactions or AGN-photoionized gas in the circumnuclear regions.

R.A. Dec. Target Name Det. Grating Exp.Time
13:25:27.60 -43:01:11.00 CEN A HRC-I NONE 15
13:25:27.60 -43:01:11.00 CEN A HRC-I NONE 15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700854

Title: A Complete Census of AGN Activity in Luminous Infrared Galaxies

PI Name: David Alexander

We are undertaking a detailed study of AGN activity in Luminous Infrared Galaxies (LIRGs) at d<60 Mpc. We have Spitzer-IRS spectroscopy for our targets, providing a sensitive probe of AGN activity at mid-IR wavelengths, but only six of our 17 LIRGs have Chandra coverage, restricting crucial information on the X-ray properties of LIRGs. Here we propose for ACIS-S observations of the 11 LIRGs in our sample that currently lack Chandra constraints. Our aims are to (1) provide the most complete constraints on the properties of AGNs in LIRGs, (2) assess the fraction of distant AGNs that are being misclassified in the deepest X-ray surveys, and (3) identify the starburst galaxy X-ray power from X-ray binaries, hot interstellar gas, and supernovae in the LIRG population.

R.A. Dec. Target Name Det. Grating Exp.Time
0:09:53.40 25:55:26.00 NGC23 ACIS-S NONE 19.8
2:09:38.60 -10:08:46.00 NGC838 ACIS-S NONE 14
4:13:49.70 -32:00:25.00 ESO 420-G013 ACIS-S NONE 12.6
10:22:20.00 21:34:10.00 NGC3221 ACIS-S NONE 19.2
12:26:54.70 -0:52:41.70 NGC4418 ACIS-S NONE 5.7
13:15:03.50 24:37:08.00 IC860 ACIS-S NONE 19.5
13:58:38.00 37:25:28.00 NGC5394/5 ACIS-S NONE 15.9
14:30:10.40 31:12:56.00 NGC5653 ACIS-S NONE 16.8
15:13:13.10 7:13:32.00 CGCG049-057 ACIS-S NONE 19.4
22:16:09.10 -36:50:35.40 IC5179 ACIS-S NONE 12.1
23:51:24.90 20:06:43.00 NGC7771 ACIS-S NONE 18.2

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700883

Title: Zeroing in on the sources of Ultrahigh Energy Cosmic Rays

PI Name: Glennys Farrar

Correlations have been observed between the highest energy cosmic rays and galaxies in the Veron-Cetty Veron catalog of Quasars and AGN. However only 14 of the 21 correlated VCV galaxies are optical AGN, and a correlation with luminous infrared galaxies has been found. This suggests the exciting possibility that UHECRs are produced by both AGN and systems associated with star formation such as GRBs or magnetars. A crucial question is therefore whether correlated galaxies which have not been identified as AGN, are in fact AGN. The Chandra observation will answer this question. Key information that will be determined by this observation is the X-ray luminosity and the spectrum of the correlated galaxies, to understand whether those which accelerate have unusual properties.

R.A. Dec. Target Name Det. Grating Exp.Time
3:04:40.50 -12:20:25.00 NGC 1204 ACIS-I NONE 5
9:27:12.90 -19:31:54.50 ESO 565-G006 ACIS-I NONE 5
9:45:25.20 -18:22:26.00 NGC 2989 ACIS-I NONE 5
13:23:15.50 -43:32:39.10 ESO 270-G007 ACIS-I NONE 5
15:05:10.10 -43:30:34.90 IC 4523 ACIS-I NONE 5
17:37:39.50 -59:56:29.00 ESO 139-G12 ACIS-I NONE 5
17:54:41.90 -60:54:39.20 2MASX J17544125-6054404 ACIS-I NONE 5
22:10:10.00 -36:05:18.30 IR 5169 ACIS-I NONE 5
22:18:46.50 -36:48:05.40 IC 5186 ACIS-I NONE 5
23:18:16.40 6:35:08.40 NGC 7591 ACIS-I NONE 5
23:23:54.60 9:40:08.80 NGC 7648 ACIS-I NONE 5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700916

Title: Using Chandra and HST to Construct the First Detailed Timeline of Early-Type Galaxy Evolution

PI Name: Ann Zabludoff

While considerable effort has been devoted to statistical studies of the origin of the red sequence of galaxies, there has been relatively little direct exploration of galaxies transforming from late to early types. Such galaxies are identified by their post-starburst spectra, bulge-dominated, tidally-disturbed morphologies, and current lack of gas. We are constructing the first detailed timeline of their evolution onto the red sequence, pinpointing when star formation ends, nuclear activity ceases, globular clusters form, and the bulk of the merging progenitors' dust disappears. Here we propose to obtain HST imaging of nine galaxies, whose wide range of post-starburst ages we have precisely dated with a new UV-optical technique and for which we were awarded Spitzer time.

R.A. Dec. Target Name Det. Grating Exp.Time
0:44:59.20 -8:53:22.90 SDSSJ004459.24-085322.9 ACIS-I NONE 10
3:16:54.90 -0:02:31.10 SDSSJ031654.91-000231.1 ACIS-I NONE 10
8:27:01.40 21:42:24.40 SDSSJ082701.40+214224.4 ACIS-I NONE 10
9:44:26.90 4:29:56.80 SDSSJ094426.96+042956.8 ACIS-I NONE 15
12:39:36.00 12:26:20.00 SDSSJ123936.05+122620.0 ACIS-I NONE 10
13:05:25.80 53:35:30.30 SDSSJ130525.83+533530.3 ACIS-I NONE 10
16:13:30.20 51:03:35.60 SDSSJ161330.19+510335.6 ACIS-I NONE 10
16:27:02.50 43:28:33.90 SDSSJ162702.56+432833.9 ACIS-I NONE 15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700917

Title: WPVS 007: the little AGN that could

PI Name: Karen Leighly

Outflows are important components of AGN, potentially removing angular momentum, enriching the intergalactic medium, and potentially playing a key role in the evolution of galaxies. Yet their astrophysics is poorly understood. We propose an FUV observation of the Seyfert-luminosity AGN WPVS 007 (M_V=-19.7, z=0.02882) using COS, coordinated with a short Chandra observation. Observed to have a miniBAL with maximum velocity v_max~1000 km/s in an 1996 HST observation, it was discovered to have developed an additional BAL flow by the time of the FUSE observation in 2003. The BAL flow has maximum velocity of at least 6,000 km/s, and the unambiguous presence of PV indicates that it is very optically thick. (Truncated to conform with length limits required by Chandra RPS.)

R.A. Dec. Target Name Det. Grating Exp.Time
0:39:15.80 -51:17:01.00 WPVS 007 ACIS-S NONE 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700920

Title: AO-10 Calibration Observations of 4U 1957+11

PI Name: CXC Calibration

These observations of the X-ray binary will be used to improve ACIS CC-mode calibration.

R.A. Dec. Target Name Det. Grating Exp.Time
19:59:23.90 11:42:30.00 4U 1957+11 ACIS-S HETG 10
19:59:23.90 11:42:30.00 4U 1957+11 ACIS-S HETG 10
19:59:23.90 11:42:30.00 4U 1957+11 ACIS-S HETG 20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700928

Title: AO-10 Calibration Observations of PKS2155-304

PI Name: CXC Calibration

We continue to monitor the build-up of contamination on ACIS with LETG/ACIS-S observations PKS2155-304. These observations are also used for internal cross-calibration as well as cross-calibration with XMM-Newton and Suzaku.

R.A. Dec. Target Name Det. Grating Exp.Time
21:58:52.00 -30:13:32.00 PKS2155-304 HRC-S LETG 10
21:58:52.00 -30:13:32.00 PKS2155-304 HRC-S LETG 10
21:58:52.00 -30:13:32.00 PKS2155-304 HRC-S LETG 10
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S LETG 10
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S LETG 10
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S LETG 10
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S HETG 15
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S HETG 15
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S LETG 30

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 10700929

Title: AO-10 Calibration Observation of PKS2155-304 Near the Read-Out

PI Name: CXC Calibration

We continue to monitor the build-up of contamination on ACIS with LETG/ACIS-S observations PKS2155-304. These observations are also used for internal cross-calibration as well as cross-calibration with XMM-Newton and Suzaku.

R.A. Dec. Target Name Det. Grating Exp.Time
21:58:52.00 -30:13:32.00 PKS2155-304 ACIS-S LETG 30

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800015

Title: Bow shock in A754

PI Name: Stephen Murray

We will obtain accurate temperatures across the apparent shock front in A754, in order to confirm that this is indeed a shock and to determine its velocity. A shock at this location, combined with the existing and forthcoming radio halo data at several frequencies, would enable a number of interesting tests.

R.A. Dec. Target Name Det. Grating Exp.Time
9:09:45.00 -9:41:30.00 A754_EAST ACIS-I NONE 100

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800028

Title: Merging Clusters in DEEP2 Field 4

PI Name: Stephen Murray

A pair of galaxy clusters in the DEEP2 Field 4 region has been found using the Chandra DEEP2 survey data. One cluster is a previously known Palomar Deep Cluster Survey object, the other is new. This observation will determine whether these clusters are merging and will provide sufficient depth to determine temperature and mass for both.

R.A. Dec. Target Name Det. Grating Exp.Time
2:28:31.90 0:33:05.60 PDCS-016 ACIS-I NONE 35

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800035

Title: Survey of AGN outbursts in clusters

PI Name: Stephen Murray

While outbursts from active galactic nuclei have been found in many clusters of galaxies, an unbiased survey is required to study the life cycles of outbursts and to assess their impacts on clusters as a population. We propose to undertake such a survey, using a sample selected from the HIFLUGCS catalog. The two clusters to be observed here are part of our sample.

R.A. Dec. Target Name Det. Grating Exp.Time
1:02:41.80 -21:52:50.00 Abell 133 ACIS-I NONE 70

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800043

Title: Chandra observations of flux-limited sample of low-redshift galaxy clusters

PI Name: Stephen Murray

We propose to obtain 10ksec ACIS-I exposures for low-redshift galaxy clusters. These observations will provide complete Chandra coverage for a flux-limited sample of 110 clusters with flux > 9e-12 erg/s/cm^2 selected in the ROSAT All-Sky Survey at |b|>20 deg. These observation will be used for accurate determinations of the ICM temperature and mass, and for study of X-ray substructures in the central regions.

R.A. Dec. Target Name Det. Grating Exp.Time
12:54:20.80 -29:01:07.20 A3528n ACIS-I NONE 10
12:57:21.50 -30:22:10.50 A3532 ACIS-I NONE 10
21:13:58.40 2:33:32.00 IC1365 ACIS-I NONE 10

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800166

Title: The X-ray gaseous environment of dying radio sources

PI Name: Matteo Murgia

We propose Chandra observations of a sample of five galaxy clusters which harbor dying radio galaxies recently discovered by us in the radio. Dying radio sources are very rare objects. We argue that their intriguing association with clusters implies that the pressure of the dense intra-cluster medium (perhaps a cooling flow) prevents quick liquidation of a dying radio lobe through adiabatic expansion. We will use the proposed observations to test this hypothesis and to compare the actual fading radio structures with the X-ray image. We intend to investigate a possible correlation between the duration of the relic phase of the de-energized radio lobes and the pressure of the exter nal medium in which they are embedded.

R.A. Dec. Target Name Det. Grating Exp.Time
17:35:04.40 64:06:05.60 Abell 2276 ACIS-I NONE 40
18:29:05.10 69:14:06.10 ZwCl 1829.3+6912 ACIS-I NONE 70

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800174

Title: Chandra Observations of Abell 3653, the Cluster with the Largest Known cD Peculiar Velocity

PI Name: Craig Sarazin

We propose high-resolution Chandra observations of the central cool core of Abell 3653, the rich cluster with the largest known cD galaxy peculiar velocity. Previous Chandra observations of A2670 and A2107, two other clusters with large cD motions, have shown that they are merging systems. We will search for evidence of a merger in A3653. We will compare the core velocity from the X-ray observations with the optical z of the cD. We will study hydrodynamical instabilities (e.g., convection and the Kelvin-Helmholtz instability) that are expected around the core. One might expect the cooling core to be destroyed by these instabilities. We will also study the interaction between the cD galaxy and other cluster galaxies, which gives information on cD formation processes.

R.A. Dec. Target Name Det. Grating Exp.Time
19:53:03.40 -52:02:13.20 Abell 3653 ACIS-S NONE 47

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800217

Title: Characterisation of ISCS J1438+3414, a z=1.41 galaxy cluster free of X-ray selection bias

PI Name: Stefano Andreon

High-redshift galaxy clusters are scarce, with only a few systems known at z > 1, and the highest spectroscopically confirmed cluster scoring z=1.45. We ask a 150 ks observation in order to characterise the second most distant cluster of galaxy known thus far, ISCS J1438+3414, at z=1.41, that is also the most distant non-X-ray selected cluster. ISCS J1438+3414, optically-infrared selected, offers a unique opportunity to estimate X-ray scale relationships at z=1.4 free from the biases that affect X-ray selected cluster samples. We will investigate a key question of cluster studies and for the determination of cosmological parameters, namely whether the simple evolution of the cluster scaling relations predicted by the self-similar model is obeyed at z=1.4.

R.A. Dec. Target Name Det. Grating Exp.Time
14:38:09.40 34:14:19.00 ISCS J1438+3414 ACIS-S NONE 150

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800324

Title: The Remarkably Inefficient AGN Outburst in HCG 62: Total Energy Budget and Lobe Contents

PI Name: David Rafferty

Chandra has revealed cavities in the hot atmospheres of groups and clusters, created by outbursts of the radio sources at their cores. Our understanding of such outbursts has improved greatly over the last few years, but we remain largely ignorant of important details, such as their importance for the preheating problem, particularly at group scales, and the contents of the cavities. We propose a deep, 120 ks observation of a remarkable cavity system in the compact group HCG 62. These data will allow us to place limits on the presence of thermal gas in the cavities, important for models of jet content and evolution, and to accurately quantify the total power budget of the AGN outburst, allowing an assessment of its importance for preheating.

R.A. Dec. Target Name Det. Grating Exp.Time
12:53:05.70 -9:12:20.00 HCG 62 ACIS-S NONE 120

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800331

Title: Mapping Dark Matter in the Merging Cluster MACSJ0025.4

PI Name: Roger Morris

Clusters of galaxies are dominated by dark matter. In mergers between massive clusters, the positions of the dark matter and main baryonic components can become separated. In rare cases, it is possible to study the presence of these two components independently. Here we propose to observe a spectacular example of such a system: the extraodinary, high-redshift cluster MACSJ0025.4-1222. Detailed Hubble Space Telescope and Subaru optical data for this system are in hand, and gravitational lensing shows the dominance of dark matter. There remains however one missing link: a detailed mass map of the main baryonic component, the hot X-ray emitting gas. We propose a deep observation to address this issue, and also to produce detailed maps of the thermodynamic state of this unique cluster.

R.A. Dec. Target Name Det. Grating Exp.Time
0:25:29.80 -12:22:47.00 MACSJ0025.4-1222 ACIS-I NONE 115

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800395

Title: MACSJ1147.3-1252: An extremely X-ray luminous cluster at z=0.58?

PI Name: Harald Ebeling

We propose an exploratory 10 ks ACIS-I observation of MACSJ1147.3-1252, a potentially extremely X-ray luminous galaxy cluster at z=0.58. Discovered first in the LCDCS, the system was recently detected also in the Massive Cluster Survey (MACS). The cluster's RASS flux suggests a total X-ray luminosity comparable to that of Cl0016+16, one of the most X-ray luminous clusters known at z>0.5. Chandra's superb angular resolution will allow us to quantify the degree of contamination from a nearby QSO (1.3 arcmin away from the cluster core) and to accurately determine the cluster luminosity. Deeper observations will be proposed in Cycle 11, should the system's properties confirm its importance for cosmological and cluster evolution studies.

R.A. Dec. Target Name Det. Grating Exp.Time
11:47:17.40 -12:52:12.00 MACSJ1147.3-1252 ACIS-I NONE 10

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800424

Title: Does AGN heating quench star formation in Brightest Cluster Galaxies?

PI Name: Helen Russell

Recent studies have demonstrated that feedback by AGN has sufficient energy to halt condensation and cooling of the ICM. However recent Spitzer observations have shown that 30-50% of BCGs exhibit star formation and so this feedback is in some cases not sufficiently strong to completely stop condensation. We propose here to observe a few such objects. By comparing the structure and distribution of X-ray gas in BCGs hosting active star formation we will determine the conditions that lead to the failure of AGN feedback to quench condensation and so star formation. The combination of X-ray-derived gas cooling times and estimates of cavity power with IR-derived star formation rates will allow us to study the entire cycle of cooling, star formation and feedback in cluster cool cores.

R.A. Dec. Target Name Det. Grating Exp.Time
1:06:49.30 1:03:23.00 ZwCl 0348 ACIS-S NONE 50
3:52:58.90 19:41:00.00 RXC J0352.9+1941 ACIS-S NONE 30
9:00:37.90 20:54:57.30 ZwCl 2089 ACIS-S NONE 40
15:56:13.80 66:20:55.00 Abell 2146 ACIS-S NONE 45

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800487

Title: The Formation of Brightest Cluster Galaxies

PI Name: John Mulchaey

We propose Chandra and HST observations of a unique low redshift cluster in which the Brightest Cluster Galaxy (BCG) is in the process of forming. The Chandra observations will be used to study the impact of BCG formation on the properties of the intracluster medium. We will test whether galaxy merging can destroy cool cores and disrupt hot gas halos. We will also explore the role of intracluster stars in enriching the intracluster medium. The HST observations will be used to search for extended tidal features and young star clusters and to estimate the final stellar mass of the BCG. The low redshift of our target allows a more detailed study of BCG formation than is possible with higher redshift systems.

R.A. Dec. Target Name Det. Grating Exp.Time
2:29:45.40 -29:37:50.80 MZ 10451 ACIS-S NONE 80

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800488

Title: Completing a combined X-ray/Sunyaev-Zel'dovich effect sample of galaxy clusters

PI Name: Ben Maughan

We propose a 14ks observation of the z=0.279 galaxy cluster A689 in order to measure the global properties and temperature profile, and finish a statistically complete sample of clusters observed with Chandra and in the Sunyaev-Zel'dovich effect (SZE) with OCRA-p. The sample will be used to investigate X-ray/SZE scaling relations - an important step towards using SZE surveys for precision cosmology. A689 is one of the most luminous clusters known but has yet to be observed by Chandra or XMM. It is bright enough to be included in many cluster surveys, but is often excluded because of possible point source contamination. This Chandra observation will measure any such contamination and determine whether A689 should be included in statistically complete cluster samples.

R.A. Dec. Target Name Det. Grating Exp.Time
8:37:25.40 14:58:58.80 A689 ACIS-I NONE 14

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800511

Title: A Chandra baseline for galaxy cluster evolution studies

PI Name: Ben Maughan

We propose to survey a sample of 10 0.04

R.A. Dec. Target Name Det. Grating Exp.Time
2:58:21.16 13:43:24.10 A401 ACIS-I NONE 5
2:58:21.16 13:43:24.10 A644 ACIS-I NONE 5
2:58:21.20 13:26:28.80 A401 ACIS-I NONE 5
2:58:21.20 13:26:28.80 A644 ACIS-I NONE 5
2:59:30.79 13:26:28.81 A401 ACIS-I NONE 5
2:59:30.79 13:26:28.81 A644 ACIS-I NONE 5
2:59:30.83 13:43:24.12 A401 ACIS-I NONE 5
2:59:30.83 13:43:24.12 A644 ACIS-I NONE 5
12:58:04.67 -1:53:37.96 A1650 ACIS-I NONE 5
12:58:04.68 -1:36:39.84 A1650 ACIS-I NONE 5
12:59:12.39 -1:36:39.85 A1650 ACIS-I NONE 5
12:59:12.40 -1:53:37.97 A1650 ACIS-I NONE 5
13:26:19.36 -27:16:46.69 A1736 ACIS-I NONE 5
13:26:19.44 -26:59:51.38 A1736 ACIS-I NONE 5
13:27:35.41 -26:59:51.20 A1736 ACIS-I NONE 5
13:27:35.52 -27:16:46.50 A1736 ACIS-I NONE 5
13:48:11.46 26:44:36.20 A1795 ACIS-I NONE 5
13:49:27.80 26:27:32.30 A1795 ACIS-I NONE 5
15:10:18.33 5:53:47.67 A2029 ACIS-I NONE 5
15:10:18.35 5:36:52.36 A2029 ACIS-I NONE 5
15:11:26.36 5:36:52.41 A2029 ACIS-I NONE 5
15:11:26.37 5:53:47.72 A2029 ACIS-I NONE 5

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800565

Title: LoCuSS: An Unbiased Multi-wavelength Study of the Cluster Quadchotomy - Gas Cooling and Cluster Merging at z=0.2

PI Name: Graham Smith

We propose a definitive study of cooling and merging in an unbiased sample of 34 clusters at z=0.2 to address "what are the physical differences between cool-core (CC) non-merging, CC merging, non-CC (NCC) non-merging and NCC merging clusters?". We will compile 4 sub-samples numbering ~5-10 clusters each, and measure the mean properties of each sub-sample. Archival Chandra data is available for 23/34 clusters, however they are biased to the more luminous clusters, and against NCC non-merger clusters. We therefore request ACIS-I observations of the remaining 11 at 20ks/cluster. These data will complete an outstanding multiwavelength dataset spanning SZE, far/mid-IR (Herschel & Spitzer), optical (HST and Subaru), UV (GALEX), X-ray (Chandra), that will become a valuable community resource.

R.A. Dec. Target Name Det. Grating Exp.Time
1:42:02.60 21:31:19.20 RX J0142.0+2131 ACIS-I NONE 20
7:51:24.30 17:30:44.00 ABELL 0598 ACIS-I NONE 20
8:25:57.80 4:14:47.50 ZwCl 0823.2+0425 ACIS-I NONE 20
15:00:19.60 21:22:08.90 ABELL 2009 ACIS-I NONE 20
22:48:31.10 -16:06:25.60 ABELL 2485 ACIS-I NONE 20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800598

Title: Local versus Large Scale : The Active Galaxy Population in High-Redshift Clusters

PI Name: Lori Lubin

We propose to use Chandra and the VLA to map the active galaxy population in two isolated, relaxed X-ray-selected clusters at z = 0.69 and 0.82, providing a vital comparison to our Cycle 7-9 programs to study high-redshift optically-selected clusters that are embedded in large scale structures or are dynamically active. Combined with our extensive photometric and spectroscopic data, the Chandra/VLA observations allow us to measure the properties of X-ray and radio sources to large clustocentric distances and study host galaxies to determine what causes gas-fueling events. Comparing with our previous studies, we can begin to disentangle the role of large-scale versus local environment in driving galaxy evolution by examining a wide range of cluster masses, dynamics, and spatial scales.

R.A. Dec. Target Name Det. Grating Exp.Time
17:57:19.40 66:31:31.00 RX J1757.3+6631 ACIS-I NONE 50
18:21:32.90 68:27:55.00 RX J1821.6+6827 ACIS-I NONE 50

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800641

Title: A Deep Image of the Most Powerful Cluster AGN Outburst

PI Name: Brian McNamara

Powerful AGN outbursts in galaxy clusters can release upward of 1E61 erg into the intracluster medium. Events of this magnitude are able to quench cooling flows and drive large-scale outflows that redistribute and heat the gas on cluster-wide scales. The most potent example of this is seen in the z=0.22 cluster MS0735.6+7421, whose powerful shock and cavity system have injected an estimated 6E61 erg of energy into the ICM. We propose to obtain a 500 ksec ACIS image of the cluster to examine in detail the relationships between the shock, cavity, and radio systems, and to investigate the impact of powerful AGN outbursts on the structure of the cluster.

R.A. Dec. Target Name Det. Grating Exp.Time
7:41:44.00 74:14:38.30 MS0735.6+7421 ACIS-S NONE 20
7:41:44.00 74:14:38.30 MS0735.6+7421 ACIS-S NONE 160
7:41:44.00 74:14:38.30 MS0735.6+7421 ACIS-S NONE 160
7:41:44.00 74:14:38.30 MS0735.6+7421 ACIS-S NONE 160

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800679

Title: The Origin and Evolution of Fossil Groups

PI Name: Eli Rykoff

We propose snapshot observations of 5 optically selected fossil group candidates. These observations will complete a sample of 15 intermediate-redshift fossil group candidates identified from the maxBCG optical cluster survey, 10 of which are scheduled via Chandra GTO time in Cycle 10. These observations will provide estimates of the diffuse X-ray flux for much deeper XMM-Newton follow-up, and they will also provide an estimate of the plasma temperature. They will also help constrain the predicted relation between BCG dominance and halo formation epoch. This snapshot project requires the spatial resolution of Chandra to separate diffuse emission from point source emission; when combined with the sensitivity of XMM-Newton follow-up, it will optimize the usage of these observatories.

R.A. Dec. Target Name Det. Grating Exp.Time
8:21:22.50 40:51:23.70 SDSS J0821+4051 ACIS-S NONE 10
9:06:38.30 3:01:39.20 SDSS J0906+0301 ACIS-S NONE 10
10:45:48.50 4:20:32.60 SDSS J1045+0420 ACIS-S NONE 10
11:33:05.50 59:20:13.70 SDSS J1133+5920 ACIS-S NONE 5
11:53:05.30 67:53:51.60 SDSS J1153+6753 ACIS-S NONE 5

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800695

Title: The Hyperluminous Infrared Galaxy IRAS 09104+4109: An Extreme Brightest Cluster Galaxy

PI Name: Kenneth Cavagnolo

We propose a detailed study of the hyperluminous infrared BCG IRAS 09104+4109. This BCG is in the rich cluster MACS J0913.7+4056, and likely hosts a ``changing-look'' AGN and the highest redshift AGN blown bubbles known to date. The environment of the BCG is best described as extreme, with cannibalized companion galaxies, the most powerful radio source of any IRAS object, and an AGN which has established a new beaming direction in the last 70 kyrs. Understanding the relationship of the BCG, AGN, and ICM in this peculiar and unique object will aide in developing better models for coupling together galaxy formation, AGN feedback, and large scale cluster environment. IRAS 09104+4109 is an ideal test case of a very short-lived but highly active stage of cluster and central galaxy formation.

R.A. Dec. Target Name Det. Grating Exp.Time
9:13:45.50 40:56:29.00 IRAS 09104+4109 ACIS-I NONE 75

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800762

Title: The Role of AGN in Massive Galaxy Formation

PI Name: Spencer Stanford

There is increasing evidence that high rates of star formation in massive galaxies was common in rich environments at z > 1. The leading candidate for quenching the star formation and transforming cluster galaxies into red sequence galaxies is AGN. Therefore we expect to see an increase in AGN incidence in dense environments at z > 1. We propose to systematically determine the incidence of AGN in galaxy clusters at 1 < z < 1.5 using moderately deep ACIS imaging of IR-selected clusters in the Bootes field. In conjunction with extensive data from Spitzer, HST, and Keck, we will test the AGN quenching paradigm for the origin of the stars in massive galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
14:25:19.30 34:28:38.20 ISCS0890 ACIS-I NONE 36
14:26:09.50 34:03:41.10 ISCS1034 ACIS-I NONE 12
14:26:30.40 33:39:33.20 ISCS1014 ACIS-I NONE 35
14:29:14.30 33:57:20.70 ISCS1051 ACIS-I NONE 24
14:29:18.50 34:37:25.80 ISCS1030 ACIS-I NONE 32
14:32:24.20 32:50:03.70 ISCS1036+1088 ACIS-I NONE 36
14:32:29.20 33:32:48.30 ISCS1017 ACIS-I NONE 33
14:32:38.40 34:36:49.00 ISCS1029 ACIS-I NONE 32
14:34:30.40 34:27:12.30 ISCS1034 ACIS-I NONE 35
14:34:46.30 35:19:45.80 ISCS1025 ACIS-I NONE 34

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800770

Title: The distribution and interactions of luminous and dark matter in strong-lensing clusters at z>0.3

PI Name: Harald Ebeling

We propose ACIS-I observations of 11 very X-ray luminous clusters at 0.3

R.A. Dec. Target Name Det. Grating Exp.Time
4:04:18.80 -27:03:05.00 MACSJ0404.2-2703 ACIS-I NONE 23
4:16:08.40 -24:04:17.00 MACSJ0416.1-2403 ACIS-I NONE 16
12:18:27.40 40:13:01.00 MACSJ1218.4+4012 ACIS-I NONE 20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800779

Title: Shocks, Ripples, and Bubbles: A Very Deep Observation of Abell 2052

PI Name: Elizabeth Blanton

The cooling flow cluster A2052 has, arguably, the morphology most similar to the Perseus cluster as seen with Chandra. Two clear bubbles to the N and S of the center of A2052 are filled with the radio lobes associated with 3C 317. Surface brightness discontinuities consistent with shocks with Mach numbers of 1.8 and 1.2 are seen near the cluster center. These may be isothermal shocks. We propose to observe Abell 2052 much more deeply to study these shock features, ripple features due to sound waves that may be found at larger radii, possible ghost bubbles, cooling gas in the bright shells around the radio source that may link the X-ray and H-alpha emission, and possible hot gas within the X-ray holes. We will directly compare the star formation and cooling rates in the cluster center.

R.A. Dec. Target Name Det. Grating Exp.Time
15:16:44.50 7:01:16.60 Abell 2052 ACIS-S NONE 20
15:16:44.50 7:01:16.60 Abell 2052 ACIS-S NONE 160
15:16:44.50 7:01:16.60 Abell 2052 ACIS-S NONE 160
15:16:44.50 7:01:16.60 Abell 2052 ACIS-S NONE 160

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800835

Title: A Merger Shock Front due to Subcluster Infall in Abell 2061?

PI Name: Daniel Wik

We propose to observe the cluster Abell 2061, for which there is evidence of current and recent merger activity in its galaxy distribution, non-thermal radio properties, and X-ray morphology. We will image and characterize the merger shock front likely due to an infalling subcluster. Only two other shock fronts have been definitively observed in clusters, both with Chandra. We will determine the cause of the shock, whether it is due to the subcluster or a recent major merger related to the cluster's radio relics. The morphology, temperature, and dynamics of the potential subcluster will be assessed. Further evidence for substructure and shocks across the cluster will also be investigated using surface brightness and temperature maps, as well as any IC emission from the radio relics.

R.A. Dec. Target Name Det. Grating Exp.Time
15:21:34.40 30:40:55.30 Abell 2061 ACIS-I NONE 32

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800857

Title: Deciphering Cluster Observables: Tracing the Baryons in Clusters of Galaxies

PI Name: Amalia Hicks

Understanding relationships between observable baryons in galaxy clusters and their underlying dark matter distributions is a crucial goal, particularly for using clusters as cosmological probes. Recent work indicates massive, low-Lx clusters exist at all redshifts, in conflict with self-similarity predictions. The only means to quantify this possibility is to observe a sample of clusters that have been chosen with no regard to their X-ray properties. We propose ACIS-S observations of 11 clusters at 0.15 < z < 0.45 chosen from the RCS cluster survey, for which robust velocity dispersions and/or initial X-ray fluxes are measured. These observations will allow us to measure cluster temperatures and masses, to rigorously assess the baryon content in an unbiased sample of massive clusters.

R.A. Dec. Target Name Det. Grating Exp.Time
2:22:40.60 1:44:32.00 RCS0222+0144 ACIS-S NONE 23.5
13:25:35.40 29:19:38.80 RCS1325+2919 ACIS-S NONE 22.5
13:30:10.70 30:43:30.60 RCS1330+3043 ACIS-S NONE 15.5
14:47:08.10 9:49:01.70 RCS 1447+0949 ACIS-S NONE 18
14:47:26.90 8:28:17.50 RCS1447+0828 ACIS-S NONE 12
16:15:53.40 30:55:46.40 RCS1615+3055 ACIS-S NONE 28
21:50:19.70 -4:42:25.40 RCS2150-0442 ACIS-S NONE 10.5
23:47:49.20 -35:35:10.90 RCS2347-3535 ACIS-S NONE 14

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800906

Title: Abell 2199: AGN outbursts and merger

PI Name: Stephen Murray

Abell 2199 is one of a sample of galaxy clusters with short central cooling times, chosen for a study of the cycle and impacts on clusters of outbursts from active galactic nuclei (AGNs). It shows the hallmarks of an outburst from the AGN at its center and also many signs of a recent minor merger. Furthermore, its central region is one of the brightest at X-ray wavelengths, making it an excellent place to take advantage of the high resolution of Chandra for the study these phenomena. We propose to make a 120 ksec ACIS-I observation of Abell 2199, which will enable a decisive interpretation of the complex structure within it.

R.A. Dec. Target Name Det. Grating Exp.Time
16:28:38.40 39:33:04.00 Abell 2199 ACIS-I NONE 120

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 10800925

Title: Calibration Observation of the Coma Cluster

PI Name: CXC Calibration

This observation will be used to further the cross-calibration efforts of XMM-Newton and Chandra

R.A. Dec. Target Name Det. Grating Exp.Time
12:59:48.00 27:58:00.00 Coma Cluster ACIS-S NONE 30

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10900076

Title: Deep Follow-up of Intermediate Redshift Groups in the XBootes Survey

PI Name: Gordon Garmire

We propose to observe two intermediate-redshift galaxy groups with Chandra to determine their temperature and X-ray luminosity to r_500. These observations are part of a larger program to observe a flux-limited sample of groups detected in the XBootes survey. The primary science goals of this project are (1) to exploit the unique multi-wavelength coverage of the XBootes field to understand the evolving relationships between the X-ray and optical properties of groups (2) to probe the evolution of group X-ray emission and constrain the non-gravitational physics affecting the energetics of the intragroup medium.

R.A. Dec. Target Name Det. Grating Exp.Time
14:27:09.30 33:15:10.10 Bootes Group 33 ACIS-S NONE 30
14:31:56.10 34:38:06.70 Bootes Group 14 ACIS-S NONE 50

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10900088

Title: The Origin and Evolution of Fossil Groups

PI Name: Gordon Garmire

We propose snapshot observations of 12 fossil group candidates for further follow-up with XMM-Newton. These targets have been identified from the maxBCG optical cluster survey (Koester et al. 2007) by selecting groups with extremely luminous and dominant brightest cluster galaxies (BCGs). They will represent the first large X-ray sample of bona-fide fossil groups. These observations will provide estimates of the diffuse X-ray flux for much deeper follow-up, and for the brightest targets, they will provide an estimate of the plasma temperature. This snapshot project requires the spatial resolution of Chandra to separate diffuse emission from point source emission; when combined with the sensitivity of XMM-Newton follow-ups, it will optimize the usage of these observatories.

R.A. Dec. Target Name Det. Grating Exp.Time
1:33:25.90 -10:26:18.60 SDSS J0133-1026 ACIS-S NONE 10
8:15:26.60 39:59:35.60 SDSS J0815+3959 ACIS-S NONE 5
8:56:40.70 5:53:47.40 SDSS J0856+0553 ACIS-S NONE 5
10:07:42.50 38:00:46.60 SDSS J1007+3800 ACIS-S NONE 5
10:17:45.60 1:56:45.80 SDSS J1017+0156 ACIS-S NONE 10
10:39:30.40 39:47:19.00 SDSS J1039+3947 ACIS-S NONE 5
11:36:23.70 7:13:37.50 SDSS J1136+0713 ACIS-S NONE 5
13:36:27.00 54:53:53.80 SDSS J1336+5453 ACIS-S NONE 7
14:10:04.20 41:45:20.90 SDSS J1410+4145 ACIS-S NONE 5
14:11:15.90 57:36:09.00 SDSS J1411+5736 ACIS-S NONE 7

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10900117

Title: Identifying the host galaxies for optically dark gamma-ray bursts

PI Name: Andrew Levan

We propose to use the high spatial resolution of Chandra to obtain precise positions for a sample of Gamma-Ray Bursts (GRBs) with no optical afterglows, where the optical light is suppressed relative to the X-ray flux. These bursts are likely to be highly obscured and may have different environments from the optically bright GRBs. Our Chandra observations will (unlike Swift XRT positions) allow for the unique identification of a host galaxy. To locate these host galaxies we will follow up our Chandra positions with deep optical and IR observations with HST. The ultimate aim is to understand any differences between the host galaxies of optically dark and bright GRBs, and how these affect the use of GRBs as tracers of starformation and galaxy evolution at high redshift.

R.A. Dec. Target Name Det. Grating Exp.Time
0:00:00.00 0:00:00.00 Dark-GRB1 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB2 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB3 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB4 ACIS-S NONE 15
0:00:00.00 0:00:00.00 Dark-GRB5 ACIS-S NONE 15

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10900388

Title: Feedback at high-z and the joint formation of AGN and massive galaxies

PI Name: Ian Smail

Theoretical galaxy formation models appear to require a feedback mechanism which quenches star formation in massive galaxies at high-z. Inverse Compton scattering of the CMB by relativistic electrons in radio jets is one potential mechanism which occurs in the most massive galaxies at high-z. There is strong evidence for IC scattering from deep Chandra imaging of 2 high-z radio galaxies and here we request time to double this sample with 100-ks observations of two further radio galaxies to confirm the ubiquity of IC halos around these massive galaxies. These deep X-ray images will also uncover overdensities of luminous AGN associated with far-IR-luminous companions, providing a census of black-hole growth and merging in high-density regions surrounding these radio galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
5:12:54.80 60:30:52.00 4C60.07 ACIS-I NONE 100

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10900553

Title: Understanding Group Evolution with Chandra

PI Name: Eric Miller

Galaxy groups are vital to our understanding of structure formation, cluster evolution, and galaxy evolution, yet they are difficult to study at even moderate redshift. We propose Chandra/ACIS observations of two groups as part of an ongoing project to observe a flux-limited sample of intermediate-redshift (z > 0.1) groups identified by the XBootes Chandra survey. This will complete a flux-limited subset of the sample for which we have confirmed group redshifts. With the unique multiwavelength coverage of the XBootes field, we aim to understand the physical connection between the X-ray and optical properties of groups, and to probe the evolution of group X-ray emission in order to constrain the non-gravitational physics affecting the energetics of the intragroup medium.

R.A. Dec. Target Name Det. Grating Exp.Time
14:26:57.90 34:12:01.40 Bootes Group 23 ACIS-S NONE 30
14:31:13.80 32:32:25.40 Bootes Group 39 ACIS-S NONE 30

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10900836

Title: A Benchmark Observation of the Warm-Hot Intergalactic Medium

PI Name: Taotao Fang

Searching for the ``Missing baryons'', in the form of the warm-hot intergalactic medium (WHIM), is a fundamental challenge faced by the current theory of structure formation. Cosmological simulations predict that majority of the WHIM can be probed in X-ray only, yet the reported detections are often in question due to statistical and systematical issues. Based on the tentative evidence in our joint XMM-Chandra ToO observations of H 2356-309, we propose a deep, non-ToO Chandra observation to definitively detect the WHIM absorption line with a measured column density expected from theory. A null detection would place an upper limit which cannot be explained by current cosmological simulations, and put future pursuit of the WHIM with current generation of X-ray telescopes in question.

R.A. Dec. Target Name Det. Grating Exp.Time
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 35
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 45
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 46
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 52
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 56.5
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 80
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 82
23:59:07.90 -30:37:41.00 H 2356-309 HRC-S LETG 103.5

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10910054

Title: Absorption and Abundances in the Ultracompact Binary 4U 0614+091

PI Name: Claude Canizares

We propose to study compositions and structures of inter- and circumstellar matter using HETGS observations of the X-ray binary 4U 0614+091. We will test the TBNEW absorption model developed for XSPEC from our absorption studies for O K, Fe L, and Ne K, compare abundances for O II/III and Ne II/III with the other sample, obtain Ne/O abundance ratio and compare with other binaries, specifically ultra-compacts, measure EWs in line absorption from Ne IX, O VIII, O VII ions to characterize the hot ISM gas toward the anti-GC region

R.A. Dec. Target Name Det. Grating Exp.Time
6:17:07.30 9:08:13.00 4U 0614+091 ACIS-S HETG 40
6:17:07.30 9:08:13.00 4U 0614+091 ACIS-S HETG 160

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10910312

Title: ChIcAGO: Chandra Identification of ASCA Galactic Objects

PI Name: Bryan Gaensler

X-ray sources in the Galactic plane trace a variety of exotic populations. Most sources with X-ray fluxes above 1e-11 erg/cm^2/s are well-known objects, while below 1e-13 erg/cm^2/s, AGN, CVs, and active stars dominate. However, many low-latitude sources lie between these two regimes, corresponding to young populations of pulsars, magnetars, hot stars and supernova remnants. To derive the birth-rates, lifetimes and distributions of these relatively rare sources, we propose to localize the unidentified objects in the 60% of the Galactic disk covered by the ASCA Galactic Plane Survey. Combined with archival analyses, multi-wavelength follow-up and the results of previous surveys, this will complete the demography of Galactic X-ray sources, from Sco X-1 down to the faintest sources known.

R.A. Dec. Target Name Det. Grating Exp.Time
15:04:36.50 -58:24:43.20 AX J150436-5824 ACIS-S NONE 4.6
15:37:51.80 -55:56:16.80 AX J153751-5556 ACIS-S NONE 4.6
15:45:57.80 -54:43:08.40 AX J154557-5443 ACIS-S NONE 8.5
15:49:05.30 -54:20:31.20 AX J154905-5420 ACIS-S NONE 7.6
15:49:51.60 -54:16:22.80 AX J154951-5416 ACIS-S NONE 1.7
15:50:35.50 -54:08:42.00 AX J155035-5408 ACIS-S NONE 5.3
16:20:46.60 -49:42:46.80 AX J162046-4942 ACIS-S NONE 3.2
16:35:25.00 -47:28:26.40 AX J163524-4728 ACIS-S NONE 6.7
17:19:23.00 -37:03:00.00 AX J171922-3703 ACIS-S NONE 7.9
17:20:50.90 -37:10:26.40 AX J172050-3710 ACIS-S NONE 6.7
17:25:50.60 -35:33:39.60 AX J172550-3533 ACIS-S NONE 5.7
17:26:42.20 -35:04:01.20 AX J172642-3504 ACIS-S NONE 7.5
17:54:04.30 -25:53:13.20 AX J175404-2553 ACIS-S NONE 6.9
18:08:57.40 -20:04:33.60 AX J180857-2004 ACIS-S NONE 6.6
18:19:16.10 -16:01:22.80 AX J181915-1601 ACIS-S NONE 2
18:22:16.10 -14:25:26.40 AX J182216-1425 ACIS-S NONE 2.5
18:25:09.80 -12:53:20.40 AX J182509-1253 ACIS-S NONE 8.6
18:25:30.50 -11:44:52.80 AX J182530-1144 ACIS-S NONE 6
18:25:38.60 -12:14:49.20 AX J182538-1214 ACIS-S NONE 2.2
18:26:51.10 -12:06:25.20 AX J182651-1206 ACIS-S NONE 6
18:31:16.30 -10:08:34.80 AX J183116-1008 ACIS-S NONE 3.1
18:33:45.60 -8:28:08.40 AX J183345-0828 ACIS-S NONE 7.7
18:47:41.30 -2:19:01.20 AX J184741-0219 ACIS-S NONE 5.6
18:56:43.20 2:20:16.80 AX J185643+0220 ACIS-S NONE 5.6
19:43:10.30 23:18:50.40 AX J194310+2318 ACIS-S NONE 1.9
19:43:32.60 23:23:52.80 AX J194332+2323 ACIS-S NONE 6.2
19:50:06.50 26:28:19.20 AX J195006+2628 ACIS-S NONE 5.4

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 10910919

Title: AO-10 Calibration Observations of the ACIS charged particle background

PI Name: CXC Calibration

We continue to measure the ACIS charged particle background with ACIS under cover observations.

R.A. Dec. Target Name Det. Grating Exp.Time
12:51:41.90 27:32:26.60 31 Com HRC-I NONE 50
12:51:41.90 27:32:26.60 31 Com HRC-I NONE 50

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