# Accepted Cycle 11 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 STARS AND WD WD BINARIES AND CV
Proposal NumberSubject CategoryPI NameTitle
11200015STARS AND WDPoppenhaegerStar-Planet Interaction in the upsilon Andromedae extrasolar planet system
11200018STARS AND WDCanizaresX-Ray Spectroscopy of Nearby Young Stars in the TW Association
11200020STARS AND WDPredehlThe Chandra LETGS Soft X-ray Spectrum of the White Dwarf GD153
11200035STARS AND WDGarmireYoung Binary DQ Tau: The hunt for X-ray emission from colliding magnetospheres (GTO part)
11200062STARS AND WDGarmireIC1396 HII region as a testbed of triggered star formation: BRC36 (GTO portion)
11200063STARS AND WDAyresThe Ups and Downs of Alpha Centauri
11200069STARS AND WDNazeInvestigating HD148937, an enigmatic hot magnetic star
11200095STARS AND WDPreibischRevealing the missing' low-mass stars in the S255/S257 star forming region
11200153STARS AND WDStelzerX-ray emission from wide brown dwarf binaries
11200169STARS AND WDOskinovaCosmic archaeology with Chandra: from a supergiant shell to young stellar objects in NGC 602
11200179STARS AND WDRobradeX-ray emission from the planet-bearing A-type star HR 8799 ?
11200199STARS AND WDTownsleyA New Story for Massive Star Formation in NGC 6357
11200214STARS AND WDSchmittThe active host star of the extrasolar planet COROT-EXO-2b
11200217STARS AND WDGetmanBRC36/IC1396 as a Testbed of Triggered Star Formation (GO part)
11200232STARS AND WDSkinnerRY Tau: A T Tauri Star Driving a Spectacular Jet
11200236STARS AND WDGetmanYoung Binary DQ Tau: The hunt for X-ray emission from colliding magnetospheres (GO part)
11200254STARS AND WDPovichUncharted Territory in M17: In Search of an Older Generation of Young Stars
11200282STARS AND WDBeiersdorferNew LETGS Observations of Procyon
11200302STARS AND WDOstenMagnetic Heating of the Outer Atmospheres of Very Low Mass Dwarfs
11200317STARS AND WDRowellProbing for multi-TeV particle acceleration towards W28-A2, a highly unusual ultra-compact HII region.
11200332STARS AND WDGuedelNeII as a Tracer for X-Rays in Disks Around T Tauri Stars
11200378STARS AND WDGrossoX-ray Census of Young Low-Mass Stars Candidates Associated with Gomez's Hamburger
11200418STARS AND WDFigerThe nature of GLIMPSE 81: a star cluster to rival Westerlund 1?
11200420STARS AND WDGuedelNew Thrust for Jets: Understanding the Physics of Young Stellar Jets and Outflows
11200435STARS AND WDGradyThe Stars and Edge-on Disks of PDS 144: An Intermediate-Mass Analog of Wide T Tauri Multiple Stars
11200492STARS AND WDWinstonA Chandra Snapshot of Serpens South
11200496STARS AND WDGuinanExploring a New Stellar X-ray Frontier: Investigating the X-ray Emissions of RR Lyr Variables
11200609STARS AND WDRobradeX-ray emission from the fast rotating A7 star Altair
11200621STARS AND WDSchneiderResolving the time-evolution of the HH 154 X-ray emission
11200668STARS AND WDCorcoranMonitoring Dynamical Mass Loss from Eta Car with the HETG
11200698STARS AND WDDrakeThe Chandra Cygnus OB2 Survey
11200702STARS AND WDMeibomRethinking the rotation-activity classifications of cool single and binary stars
11200754STARS AND WDBROWNACIS IMAGING SPECTROSCOPY OF T TAURI STARS IN THE HST/COS CYCLE 17 LARGE PROJECT SAMPLE
11200793STARS AND WDTestaX-ray emission mechanism in the Be star HD 42054
11200837STARS AND WDDupreeSLEUTHING THE MAGNETIC DYNAMO IN METAL-POOR STARS
11200899STARS AND WDCoveyMeasuring X-ray Heating of Circumstellar Disks: Linking Stellar X-ray Flares With Mid-IR Disk Afterglows
11300009WD BINARIES AND CVPietschResolving short supersoft source states of optical novae in the core of M31
11300022WD BINARIES AND CVPredehlResolving short supersoft source states
11300122WD BINARIES AND CVMukaiThe Nature of the Soft Component in the Symbiotic Star CH Cygni
11300491WD BINARIES AND CVKongPrimordial formation of close binaries in globular clusters with low desity cores
11300603WD BINARIES AND CVStrohmayerHigh Resolution Spectroscopy of RX J0806.3+1527
11300610WD BINARIES AND CVDieballDeep X-ray observations of the Globular Cluster M15: A complete census of the interacting binary population
11300893WD BINARIES AND CVSivakoffBinary Formation in the Sparse Galactic Globular Cluster NGC 3021
11400006BH AND NS BINARIESKaastraChandra follow-up of weak persistent sources found in INTEGRAL maps
11400006BH AND NS BINARIESKaastraChandra follow-up of weak persistent sources found in INTEGRAL maps
11400007BH AND NS BINARIESCHURCHThe mechanism of jet formation in Cyg X-2 and the nature of the hot ADC
11400012BH AND NS BINARIESKaastraChandra follow-up of X-ray sources in interacting galaxies
11400037BH AND NS BINARIESCanizaresObserve Bright Atol Sources at High Mass Accretion Rates
11400046BH AND NS BINARIESPredehlConfirming the Proper Motion of the Neutron Star in Puppis-A
11400085BH AND NS BINARIESKaaretAn Irradiated Disk in an Ultraluminous X-Ray Source
11400118BH AND NS BINARIESKeekTaking the temperature of the superburster 4U 1608-522 after an outburst
11400170BH AND NS BINARIESCORBELX-Ray Jets in Microquasars
11400172BH AND NS BINARIESKongA Chandra survey of quiescent black hole X-ray binaries
11400197BH AND NS BINARIESPaizisINVESTIGATING NEW INTEGRAL SOURCES WITH CHANDRA
11400205BH AND NS BINARIESNowakCygnus X-1 Viewed Outside of its Secondary's Wind
11400239BH AND NS BINARIESGuverX-ray Column Density Towards the Low Mass X-ray Binary 4U 1702-429
11400250BH AND NS BINARIESSoleriToO observations of the microquasar GRS 1915+105 in quiescence
11400295BH AND NS BINARIESMillerHigh Resolution Spectroscopy of a Black Hole Transient
11400306BH AND NS BINARIESPooleyTransient LMXBs in Globular Clusters: More Numerous than We Thought?
11400329BH AND NS BINARIESJonkerFollowing a black hole candidate X-ray transient to quiescence
11400331BH AND NS BINARIESGrenierToO observation of a bright Galactic transient discovered by Fermi and Swift
11400336BH AND NS BINARIESChakrabartySpectroscopy of the Resurgent Ultracompact Binary 4U 1626-67
11400354BH AND NS BINARIESDegenaarCrustal cooling of the neutron star in EXO 0748-676
11400372BH AND NS BINARIESDegenaarThe crust cooling of HETE J1900.1-2455
11400393BH AND NS BINARIESPatrunoIdentifying the nature of the compact object in Swift J1753.5-0127
11400526BH AND NS BINARIESLevinePrecise Positions of Historically Bright X-ray Binaries
11400637BH AND NS BINARIESMigliariDisk wind and jets in the neutron star binary GX9+9
11400651BH AND NS BINARIESRutledgeQuiescent Low Mass X-Ray Binaries and Cataclysmic Variables in the Globular Cluster NGC 6304
11400669BH AND NS BINARIESNowakDeep Chandra Observations of the Black Hole LMC X-1
11400764BH AND NS BINARIESLorimerPSR J1023+0038: Tracing the Accretion History of a Missing Link'
11400785BH AND NS BINARIESChakrabartyPrecise Localization of Transient Low-Mass X-ray Binaries
11400795BH AND NS BINARIESLaycockX-Ray Binaries In a Nearby Star-Burst Galaxy: A New Lab for Astrophysics.
11400809BH AND NS BINARIESHomanThe cooling neutron star in the super-Eddington accretor XTE J1701-462
11400864BH AND NS BINARIESXiangDetermining the Properties of Intervening Gas and Dust along the GX 17+2 Line-of-sight
11500004SN, SNR AND ISOLATED NSPavlovYoung, hot PSR J1357-6429 and its PWN
11500011SN, SNR AND ISOLATED NSKaastraMonitoring the spectral evolution of RXJ0720-3125 and determining its nature
11500021SN, SNR AND ISOLATED NSPredehlHFPK 334: A New Supernova Remnant in the Small Magellanic Cloud
11500027SN, SNR AND ISOLATED NSGarmireX-ray emission from the old pulsar B1451-68
11500032SN, SNR AND ISOLATED NSGarmireSNR RCW 103: Ejecta, Blast Wave, and the Central Compact Object
11500036SN, SNR AND ISOLATED NSMurrayCompleting the Timing of Two Isolated Neutron Stars
11500041SN, SNR AND ISOLATED NSMurrayImaging Supernova Remnant 1987A at the Highest Resolution
11500043SN, SNR AND ISOLATED NSGarmireSearch for Long GRB Jet Breaks
11500043SN, SNR AND ISOLATED NSGarmireSearch for Long GRB Jet Breaks
11500044SN, SNR AND ISOLATED NSGarmireSnap-shot survey of unidentified galactic GeV sources
11500065SN, SNR AND ISOLATED NSKATSUDAThe First X-Ray Expansion Measurements of the Cygnus Loop
11500068SN, SNR AND ISOLATED NSBurrowsCHANDRA CYCLE 11 SPATIAL AND SPECTRAL MONITORING OF SNR1987A
11500078SN, SNR AND ISOLATED NSSafi-HarbProbing the Central Engine of the Plerionic SNR CTB 87
11500201SN, SNR AND ISOLATED NSPetreA Direct X-Ray Expansion Measurement of the SMC SNR 1E 0102.2--7219
11500222SN, SNR AND ISOLATED NSLorimerPSRJ1832+0029: a unique target for pulsar emission physics
11500272SN, SNR AND ISOLATED NSPARKA Detailed Study of the Aged O-Rich Supernova Remnant 0049-73.6
11500276SN, SNR AND ISOLATED NSPARKA Detailed Study of the Type Ia Supernova Remnant G299.2-2.9
11500355SN, SNR AND ISOLATED NSBernardiniUnveiling the nature of cyclic behavior in the period evolution of the Anomalous X ray Pulsar XTE j1810-197
11500373SN, SNR AND ISOLATED NSChiangTHE X-RAY EVOLUTION OF SUPERNOVA 2004AM
11500374SN, SNR AND ISOLATED NSBergerRapid Observations of Short Gamma-Ray Bursts: Accurate Positions Hold the Key to the Progenitor Population
11500395SN, SNR AND ISOLATED NSKouveliotouTOO Observations of Soft Gamma Repeaters
11500430SN, SNR AND ISOLATED NSChandraSolving the mystery of Type IIn supernovae
11500452SN, SNR AND ISOLATED NSRobertsA Search for X-Rays From Pulsars Discovered by Fermi
11500474SN, SNR AND ISOLATED NSSoderbergThe Energetics and Environments of 'Naked' Supernovae
11500485SN, SNR AND ISOLATED NSKaspiTarget-of-Opportunity Chandra Observations of Glitching High-B Radio Pulsars: Searching for Magnetar Metamorphoses
11500488SN, SNR AND ISOLATED NSSoderbergAn In-Depth Study of the Nearest Gamma-Ray Bursts
11500493SN, SNR AND ISOLATED NSKaspiTINY HICCUPS TO TITANIC EXPLOSIONS: Tackling Transients in Anomalous X-ray Pulsars
11500524SN, SNR AND ISOLATED NSPooleyCatching up to the Hydrogen Envelope: Late-time X-ray Observations of Type Ib/c SNe
11500537SN, SNR AND ISOLATED NSTanakaChandra Observation of a Gamma-ray Emitting SNR, W44
11500541SN, SNR AND ISOLATED NSTerrierInvestigating the nature of the candidate SNR G29.37+0.10
11500573SN, SNR AND ISOLATED NSGotthelfTwo Magnetar Candidates in HESS Supernova Remnants
11500575SN, SNR AND ISOLATED NSWeisskopfSearch for the X-Ray counterpart to LAT PSR J2021+4026
11500674SN, SNR AND ISOLATED NSPooleyChandra Observations of New X-ray Supernovae
11500703SN, SNR AND ISOLATED NSDe LucaA DEEP CHANDRA/NOAO INVESTIGATION TO IDENTIFY THE COUNTERPART OF AN OLD PULSAR DISCOVERED IN GAMMA-RAYS
11500712SN, SNR AND ISOLATED NSDelaneyThe Proper Motion of the Central Compact Object in Cassiopeia A
11500714SN, SNR AND ISOLATED NSHughesThe Proper Motion of SNR E0519-69.0
11500744SN, SNR AND ISOLATED NSButlerNailing Down the Broadband Properties of a Short GRB with the help of Chandra
11500770SN, SNR AND ISOLATED NSGavriilChandra Monitoring of the Rotation-Powered Pulsar/Magnetar Transition Object PSR J1846-0258
11500788SN, SNR AND ISOLATED NSMcLaughlinCrab Giant Pulses: A Correlation Study at Radio and X-rays
11500799SN, SNR AND ISOLATED NSRolConstraining GRB phycis through their afterglow light curves
11500803SN, SNR AND ISOLATED NSPatnaudeTesting Shock Physics Through Flux Variability in Cas A
11500804SN, SNR AND ISOLATED NSHuiConfirming and exploring the supernova remnant candidate G308.3-1.4
11500846SN, SNR AND ISOLATED NSBauerTracking the X-ray Evolution of the Enigmatic SN1996cr
11500865SN, SNR AND ISOLATED NSKargalstevThe long tail of PSR J1740+1000
11500877SN, SNR AND ISOLATED NSSivakoffConstraining the Distance & Temperature of LAT PSR J1742-20, The Newly Discovered Nearby Middle-Aged Neutron Star
11610210NORMAL GALAXIES: DIFFUSE EMISSIONWangMapping out the hot gas outflow from the M31 bulge
11610278NORMAL GALAXIES: DIFFUSE EMISSIONSwartzX-raying Circumnuclear Star Formation and Feedback in Nearby Normal Galaxies
11610479NORMAL GALAXIES: DIFFUSE EMISSIONTrinchieriSeyfert's Sextet: an evolved Stephan's Quintet
11610596NORMAL GALAXIES: DIFFUSE EMISSIONBUOTESnapshots of Isolated Elliptical Galaxies
11610615NORMAL GALAXIES: DIFFUSE EMISSIONIrwinPeering Into the Bondi Radius of the Supermassive Black Hole of NGC3115
11620024NORMAL GALAXIES: X-RAY POPULATIONSMurrayBlack Hole X-ray Novae in M31
11620048NORMAL GALAXIES: X-RAY POPULATIONSGarmireAre the Observed Submm Flares Related to the X-ray/NIR Flares in Sgr A*?
11620101NORMAL GALAXIES: X-RAY POPULATIONSFabbianoConstraining the transient LMXB population
11620107NORMAL GALAXIES: X-RAY POPULATIONSKaaretX-Rays from Blue Compact Dwarf Galaxies
11620112NORMAL GALAXIES: X-RAY POPULATIONSFabbianoThe ringed galaxy NGC1291
11620243NORMAL GALAXIES: X-RAY POPULATIONSMaccaroneA new look at the X-ray binary richest galaxy
11620280NORMAL GALAXIES: X-RAY POPULATIONSGarciaMonitoring M31 for BHXNe
11620296NORMAL GALAXIES: X-RAY POPULATIONSRappaportSearch for the Most Luminous ULXs in Collisional Ring Galaxies
11620601NORMAL GALAXIES: X-RAY POPULATIONSPrestwichUltra-Luminous x-Ray Sources in the Most Metal-Poor Galaxies
11620675NORMAL GALAXIES: X-RAY POPULATIONSClarksonThe Deepest Stellar X-ray/optical Census of the Bulge
11620883NORMAL GALAXIES: X-RAY POPULATIONSvan den BergStudying binary evolution in the oldest open clusters: Collinder 261
11620895NORMAL GALAXIES: X-RAY POPULATIONSKunduLow Mass X-ray Binaries in Spiral Galaxies
11620915NORMAL GALAXIES: X-RAY POPULATIONSGalloAccretion onto nuclear black holes in early type galaxies: comparing field vs. clusters
11700016ACTIVE GALAXIES AND QUASARSMurrayThe Radio Lobe/ICM Interaction in the Unusual Radio Galaxy 3C 310
11700017ACTIVE GALAXIES AND QUASARSMurrayMonitoring of the X-ray Jet and LMXB population of Centaurus A
11700019ACTIVE GALAXIES AND QUASARSCanizaresA Deep Chandra HETG View of Outflowing Warm Absorbers and Relativistically Blurred Emission in ESO 323-G077
11700030ACTIVE GALAXIES AND QUASARSGarmireA Survey of X-ray Variability in Bright Broad Absorption Line Quasars Over Multi-Year Timescales
11700039ACTIVE GALAXIES AND QUASARSGarmireStudying the Optical and X-ray Emission Regions of Quasar PG1115+080 by Monitoring Microlensing Events
11700051ACTIVE GALAXIES AND QUASARSCanizaresInvestigating the Complexity of NGC 2992 with HETG
11700108ACTIVE GALAXIES AND QUASARSKaastraThe chemical composition of AGN outflows
11700158ACTIVE GALAXIES AND QUASARSJonesUGC408: two big bangs from a modest size black hole?
11700191ACTIVE GALAXIES AND QUASARSKraftA Chandra Observation of the Jet-Cloud Interaction in the Centaurus A Northern Middle Radio Lobe
11700216ACTIVE GALAXIES AND QUASARSEvansResolving the NLR/ENLR Shocks in the Radio Galaxy Coma A
11700218ACTIVE GALAXIES AND QUASARSBoettcherCoordinated Multiwavelength Observations of New TeV Blazars Detected by VERITAS
11700256ACTIVE GALAXIES AND QUASARSHardcastleThe nature of X-ray jets in powerful core-dominated quasars
11700257ACTIVE GALAXIES AND QUASARSGezariRapid Follow-Up Observations of Tidal Disruption Events Discovered by Pan-STARRS1
11700259ACTIVE GALAXIES AND QUASARSHoX-ray Signatures of Accretion in AGNs with Intermediate-mass Black Holes
11700262ACTIVE GALAXIES AND QUASARSBrandtHunting for Intrinsically X-ray Weak Quasars: The Case of PHL 1811 Analogs
11700264ACTIVE GALAXIES AND QUASARSHardcastleThe nature of active nuclei in radio galaxies: observations of the 2Jy sample
11700324ACTIVE GALAXIES AND QUASARSLeighlyWeak-line Quasars: Always X-ray Weak?
11700352ACTIVE GALAXIES AND QUASARSKaufmannExploring the X-ray - TeV connection in BL Lacs on short timescales
11700365ACTIVE GALAXIES AND QUASARSHarrisThe X-ray - TeV Connection in M87
11700377ACTIVE GALAXIES AND QUASARSYoungThe Cavities and Jet-cloud Interaction of PKS B2152-699
11700489ACTIVE GALAXIES AND QUASARSRisalitiDeeply embedded AGNs in infrared ultraluminous starbursts
11700501ACTIVE GALAXIES AND QUASARSKochanekThe Size of Quasar Non-Thermal/X-ray Emission Regions
11700503ACTIVE GALAXIES AND QUASARSGeorgakakisIs there an AGN in the Blue Compact Dwarf Galaxy Mrk 996?
11700510ACTIVE GALAXIES AND QUASARSCrostonThe environmental and epoch dependence of radio-loud AGN feedback
11700538ACTIVE GALAXIES AND QUASARSBlitzNGC1266: Local Candidate for AGN Feedback
11700550ACTIVE GALAXIES AND QUASARSO'DeaImaging Strong Shocks in the Compact Steep Spectrum Radio Galaxy B3 1445+410
11700556ACTIVE GALAXIES AND QUASARSDonleyX-ray Obscured Broad-line AGN
11700633ACTIVE GALAXIES AND QUASARSHardcastleVariability and particle acceleration in the jet of Pictor A
11700638ACTIVE GALAXIES AND QUASARSSunStrong radio AGN in the center of galaxy groups
11700645ACTIVE GALAXIES AND QUASARSKonopelkoA Joint Chandra, Fermi, MAGIC, and VERITAS Broadband Study of One High-Energy Blazar in A Major Outburst
11700685ACTIVE GALAXIES AND QUASARSMiniuttiThe nature of the variable X-ray absorber in ESO 362-G18
11700688ACTIVE GALAXIES AND QUASARSSilvermanAGN ignition in the galaxy group environment
11700706ACTIVE GALAXIES AND QUASARSConstantinChandra deciphers the Optically 'Dull' X-ray Bright Galaxies at z~0.
11700740ACTIVE GALAXIES AND QUASARSJenkinsInvestigating the Nuclear Activity of Barred and Unbarred Spiral Galaxies
11700813ACTIVE GALAXIES AND QUASARSViraniDetermining the Nature of the Faintest Hard X-ray Selected AGN with Chandra
11700815ACTIVE GALAXIES AND QUASARSMADEJSKIChandra ToO Observations of Flaring Fermi Blazars
11700840ACTIVE GALAXIES AND QUASARSBlundellSpent synchrotron lobes in giant radio galaxies: how much energy do they store?
11700858ACTIVE GALAXIES AND QUASARSSiemiginowskaJet-ISM Interactions in a Restarting Radio Galaxy 4C 29.30
11700880ACTIVE GALAXIES AND QUASARSGhoshChandra survey of Polar Broad Absorption-Line Quasars
11700896ACTIVE GALAXIES AND QUASARSTremontiAfter the Fall: Fading AGN in Post-starburst Galaxies
11800028CLUSTERS OF GALAXIESGarmireChandra Observations of SZ-selected Galaxy Clusters Detected by the South Pole Telescope
11800049CLUSTERS OF GALAXIESPredehlX-ray view of a unique relic radio mini-halo in a poor cluster of galaxies
11800052CLUSTERS OF GALAXIESMurrayChandra observations of low-z galaxy groups
11800055CLUSTERS OF GALAXIESMurrayCHandra Extended Cluster Cosmology Sample (CHECCS)
11800058CLUSTERS OF GALAXIESMurrayA Chandra Study of a Complete Sample of SZE Selected Galaxy Clusters
11800074CLUSTERS OF GALAXIESMurrayChandra Observations of the Merging Clusters A98 and A1750
11800084CLUSTERS OF GALAXIESGittiInvestigating AGN feedback in cool cores detected in H\alpha
11800090CLUSTERS OF GALAXIESEbelingThe distribution and interactions of luminous and dark matter in strong-lensing clusters at z>0.3
11800102CLUSTERS OF GALAXIESFabianExtending the Deep Image of the Perseus Cluster: The Outer Bubbles, Filaments and Ripples
11800193CLUSTERS OF GALAXIESSandersTesting AGN feedback with AWM7
11800194CLUSTERS OF GALAXIESDavidTesting the Universality of the Gas Mass Fraction in Clusters of Galaxies
11800242CLUSTERS OF GALAXIESEbelingMACSJ0358.8-2955: much more distant and exciting than we thought
11800319CLUSTERS OF GALAXIESEllingsonMassive Galaxy Clusters at High Redshift from the Spitzer SpARCS Survey
11800323CLUSTERS OF GALAXIESBonamenteCosmology with a complete sample of 0.15
11800341CLUSTERS OF GALAXIESFabianThe X-ray Luminous Cluster underlying the z=1.04 blazar PKS 1229-02: Does it have a cool core?
11800350CLUSTERS OF GALAXIESRussellCompleting the cycle of cooling, star formation and AGN heating in Brightest Cluster Galaxies
11800376CLUSTERS OF GALAXIESBoehringerChandra Study of the very X-ray Luminous Distant Galaxy Cluster XMMUJ1230+1339 at z = 0.975
11800387CLUSTERS OF GALAXIESKraftHeating group gas via the supersonic inflation of radio lobes: a deep Chandra observation of 3C 449
11800471CLUSTERS OF GALAXIESMohrChandra Observations of a Complete Sample of SZE Selected Galaxy Clusters
11800515CLUSTERS OF GALAXIESStawarzPowerful Radio Sources in the Centers of Nearby Clusters
11800517CLUSTERS OF GALAXIESSunStrong shocks, cavities and AGN heating in galaxy groups
11800539CLUSTERS OF GALAXIESMachacekBlack Hole Masses and the Merger of High Velocity Dispersion Galaxy NGC6861 with NGC6868 in the AS0851 Galaxy Group
11800560CLUSTERS OF GALAXIESMaozMACS1354+77: A new bullet' cluster?
11800640CLUSTERS OF GALAXIESOguriThe Chandra View of the Largest Quasar Lens SDSS J1029+2623
11800671CLUSTERS OF GALAXIESIrwinChandra Observations of Two Unusual Lensing Groups of Galaxies
11800700CLUSTERS OF GALAXIESDonahueThe Strongest Cool Core Cluster in the REXCESS X-ray Cluster Sample
11800709CLUSTERS OF GALAXIESWernerStudy of the interaction between the puzzling AGN and the hot gas in the cooling core of Sersic 159-03
11800792CLUSTERS OF GALAXIESvon der LindenAnatomy of a merger: the curious case of MACS J0417.5-1154
11800852CLUSTERS OF GALAXIESRykoffThe X-Ray, SZ, and Optical Scaling Relations of Massive Galaxy Clusters
11900125EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYSLevanA survey of dark gamma-ray burst hosts
11900514EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYSGultekinCOMBH: Chandra Observations of M-sigma Black Holes
11900760EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYSCheungIdentifying Unidentified Fermi-LAT Objects (UFOs) at High-Latitude
11910040GALACTIC DIFFUSE EMISSION AND SURVEYSMurrayGTO ChIcAGO: Chandra Identification of ASCA Galactic Objects
11910605GALACTIC DIFFUSE EMISSION AND SURVEYSBowerX-Ray Counterparts to Radio Transients
11910648GALACTIC DIFFUSE EMISSION AND SURVEYSFangProbing Galactic Feedback with X-ray Binaries
11910849GALACTIC DIFFUSE EMISSION AND SURVEYSTerrierSgr B2 ten year later: on the nature of the hard X-rays from the CMZ

Subject Category: STARS AND WD

Proposal Number: 11200015

Title: Star-Planet Interaction in the upsilon Andromedae extrasolar planet system

PI Name: Katja Poppenhaeger

We propose to carry out a 60 ks Chandra/ACIS-S observation of the planet bearing host star ups And to find coronal signatures of Star-Planet Interactions (SPI). ups And is one of the only two known stars with cyclically enhanced optical activity in phase with the planetary orbit. The proposed X-ray observation will establish SPI as a coronal effect, test if there are systematic differences between chromospheric and coronal planet-induced activity profiles and allow conclusions about the amount of energy deposited in the corona by SPI, about the planetary magnetic field and the planet's internal structure, its irradiation from the star and therefore its evaporation rate and lifetime.

R.A. Dec. Target Name Det. Grating Exp.Time
01:36:47.80+41:24:19.80HD 9826ACIS-SNONE60

Subject Category: STARS AND WD

Proposal Number: 11200018

Title: X-Ray Spectroscopy of Nearby Young Stars in the TW Association

PI Name: Claude Canizares

To improve our understanding of X-ray emitting regions of T Tauri stars (TTS) we are conducting an X-ray spectroscopic study of the TW Hya Association (TWA). X-ray spectra of TWA stars provide plasma diagnostics that yield insights into the origin of X-ray emission from young stars and are diagnostic of accretion processes. The co-evolutionary population of 10 Myr-old TTS, their proximity, and their lack of X-ray absorbing cloud material make the TWA well suited to X-ray spectroscopy. Here, our focus is on a binary TTS system, TWA-19AB, the only TWA system known to include a G-star, important for determining the role of mass in pre-main-sequence X-ray emission. The close (40") K7 companion will provide an X-ray spectrum of a weakly accreting star similar to TW Hya itself.

R.A. Dec. Target Name Det. Grating Exp.Time
11:47:24.50-49:53:03.00TWA 19AACIS-SHETG60

Subject Category: STARS AND WD

Proposal Number: 11200020

Title: The Chandra LETGS Soft X-ray Spectrum of the White Dwarf GD153

PI Name: Peter Predehl

To calibrate X-ray instruments at low energies high resolution spectra of isolated white dwarfs are needed. So far only only HZ43 and Sirius B have been observed and studied in detail with the Chandra LETGS and EUVE. With this proposed Chandra LETGS observation and the existing EUVE data we will be able to further contrain the physical parameters the white dwarf GD153. Like this with the help of the three independant physical models for these white dwarfs we will be able to better calibrate low energy response (E<0.2keV) of existing and future X-ray detectors.

R.A. Dec. Target Name Det. Grating Exp.Time
12:57:02.30+22:01:52.50GD153HRC-SLETG115

Subject Category: STARS AND WD

Proposal Number: 11200035

Title: Young Binary DQ Tau: The hunt for X-ray emission from colliding magnetospheres (GTO part)

PI Name: Gordon Garmire

The young high eccentricity binary DQ Tau exhibits powerful periodic mm flaring attributed to magnetosphere collisions of binary components. Simultaneous with mm CARMA, we propose combined GTO+GO Chandra ACIS-I3 observation of the periastron passage to search for X-ray emission from colliding magnetospheres. This proposal is a conditional GTO support of our GO-11 project (PI Getman) with similar title and object name.

R.A. Dec. Target Name Det. Grating Exp.Time
04:46:53.10+17:00:00.10DQ TauACIS-INONE30

Subject Category: STARS AND WD

Proposal Number: 11200062

Title: IC1396 HII region as a testbed of triggered star formation: BRC36 (GTO portion)

PI Name: Gordon Garmire

The formation of most stars in the Galaxy appears to be triggered by some external compression processes such as OB ionization, winds or supernovae. Quantitative understanding of triggering processes is still primitive. The radiation driven implosion (RDI) is the most observationally testable model using bright rimmed clouds (BRCs) on the edges of large HII regions. This 30 ksec ACIS-I GTO proposal is part of our program to map the IC1396 HII region in order to study contribution of RDI triggered stellar population to the total population of the region. This specific pointing is a GTO conditional support for our GO-11 project of similar title and object name (BRC36).

R.A. Dec. Target Name Det. Grating Exp.Time
21:36:50.30+57:30:24.00IC1396_BRC36ACIS-INONE30

Subject Category: STARS AND WD

Proposal Number: 11200063

Title: The Ups and Downs of Alpha Centauri

PI Name: Thomas Ayres

Nearby Alpha Centauri hosts two of the best characterized late-type dwarfs, besides the Sun itself; thanks to the accurate orbit, resolved angular diameters, and well understood co-evolutionary state. The G and K components of the system have X-ray measurements extending back to the late-1970's; in some sense superior to the solar high-energy irradiance. The latter is not routinely measured in the normal cosmic energy bands, and must be reconstructed from proxies. The present proposal is to continue this ongoing twin coronal narrative with additional HRC-I pointings in Cycle 11, including an attempt to assess the importance of rotational modulation effects. FUV spectroscopy by HST-COS will leverage the unique coronal activity record.

R.A. Dec. Target Name Det. Grating Exp.Time
14:39:31.40-60:50:01.00Alpha CentauriHRC-INONE20

Subject Category: STARS AND WD

Proposal Number: 11200069

Title: Investigating HD148937, an enigmatic hot magnetic star

PI Name: Yael Naze

HD148937 is a peculiar magnetic hot star surrounded by a nebula thought to have been ejected by the star in an LBV-like event. It is one of the only three known Of?p objects of the Galaxy, and the X-ray brightest of its class. We propose to perform a detailed analysis of the high resolution X-ray spectrum of this star to pinpoint the exact origin of the X-ray emission in this peculiar class of objects.

R.A. Dec. Target Name Det. Grating Exp.Time
16:33:52.40-48:06:40.50HD148937ACIS-SHETG100

Subject Category: STARS AND WD

Proposal Number: 11200095

Title: Revealing the missing' low-mass stars in the S255/S257 star forming region

PI Name: Thomas Preibisch

In the S255/S257 star forming region a dense cluster of young stellar objects is sandwiched between two HII regions. Interestingly, the exciting stars of the HII regions have no clusters of lower-mass stars around them, suggesting perhaps that these massive stars formed in isolation. If, however, these B0 stars are several Myr older than the embedded cluster, associated low-mass stars should be loosely scattered around them. Chandra is the ideal tool to uncover these young stars and to discern them from unrelated field stars by their strongly elevated X-ray emission. Chandra will provide a comprehensive census of young low-mass stars and reveal their spatial distribution, which will allow us to decide between the different proposed star formation scenarios for the S255/S257 region.

R.A. Dec. Target Name Det. Grating Exp.Time
06:12:54.00+17:59:24.00S255/S257ACIS-INONE75

Subject Category: STARS AND WD

Proposal Number: 11200153

Title: X-ray emission from wide brown dwarf binaries

PI Name: Beate Stelzer

Wide binary brown dwarfs offer a unique opportunity to study similarities and differences of substellar objects that were born and have evolved together. They also represent an efficient way to search for relations of brown dwarf X-ray emission with bolometric luminosity, effective temperature and mass, yielding two points in the parameter space at one shot. Only four wide binary brown dwarfs are known in various star forming regions. We have already successfully resolved one of them with Chandra, and propose here to observe all remaining three.

R.A. Dec. Target Name Det. Grating Exp.Time
04:23:35.40+25:03:03.00FU TauACIS-SNONE60

Subject Category: STARS AND WD

Proposal Number: 11200169

Title: Cosmic archaeology with Chandra: from a supergiant shell to young stellar objects in NGC 602

PI Name: Lidia Oskinova

The Wing of the SMC has low metalicity, and low content of gas and dust. It provides an ideal nearby laboratory to study star formation and feedback in an environment that resembles the early Universe. We propose a 300 ks Chandra observation of NGC602, a massive star cluster at the edge of a supergiant shell in the Wing. This cluster has a simple morphology and is located in a region of high transparency for X-rays. The Chandra data will help to answer the fundamental questions about the mechanisms that sculpture the largest structures in the ISM, and trigger the formation of stars. This observation will be complemented with data from other NASA Great Observatories HST and Spitzer, and will establish a template for studies of active star formation in external galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
01:29:38.60-73:34:25.10NGC 602ACIS-INONE300

Subject Category: STARS AND WD

Proposal Number: 11200179

Title: X-ray emission from the planet-bearing A-type star HR 8799 ?

We propose a 10 ks pointing with Chandra ACIS-S of the A5V star HR 8799. The star is associated with a RASS (ROSAT All Sky Survey) X-ray source, however its identification is uncertain. HR 8799 recently gained larger attention, when multiple orbiting planets were detected by direct imaging. With the proposed ACIS pointing we want to verify that the X-ray emission does indeed come from HR 8799 and investigate a potential future X-ray observation of this remarkable star.

R.A. Dec. Target Name Det. Grating Exp.Time
23:07:28.80+21:08:02.90HR 8799ACIS-SNONE10

Subject Category: STARS AND WD

Proposal Number: 11200199

Title: A New Story for Massive Star Formation in NGC 6357

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 request two 40-ks ACIS-I pointings in NGC 6357, a nearby massive star-forming complex comprised of a "cluster of clusters" that may be an OB association in the making. We will identify the source(s) of mysterious hard X-ray emission in component G353.2+0.7, study the massive stars and the high-luminosity tail of the pre-main sequence stellar population in the rich cluster in component G353.1+0.6, and characterize diffuse X-rays tracing wind-shocked plasma and filling many of the complex overlapping bubbles that are carving up NGC 6357's natal giant molecular cloud.

R.A. Dec. Target Name Det. Grating Exp.Time
17:25:34.20-34:23:11.70G353.1+0.6ACIS-INONE40
17:26:01.70-34:15:15.40G353.2+0.7ACIS-INONE40

Subject Category: STARS AND WD

Proposal Number: 11200214

Title: The active host star of the extrasolar planet COROT-EXO-2b

PI Name: Jurgen Schmitt

We propose to perform an exploratory X-ray pointing at the host star of the extrasolar planet COROT-EXO-2b. In contrast to almost all other extrasolar planet host stars, this star is remarkably active and (presumably) quite young. Its COROT light curve shows clear signatures of rotational modulation, and there is very pronounced structure in the transit light curves, which is explained by partial coverage of star spots by the COROT-EXO-2b planet. The presence of the planet thus acts as a sensitive shutter, sensing different parts of the stellar surface for inhomogeneities. The aim of this proposal is to determine the X-ray flux level of COROT-EXO2a, in order to assess the potential of follow-up X-ray studies.

R.A. Dec. Target Name Det. Grating Exp.Time
19:27:07.00+01:23:02.002MASS J19270649+0123013ACIS-SNONE15

Subject Category: STARS AND WD

Proposal Number: 11200217

Title: BRC36/IC1396 as a Testbed of Triggered Star Formation (GO part)

PI Name: Konstantin Getman

The formation of most stars in the Galaxy appears to be triggered by some external compression processes such as OB ionization, winds or supernovae. Quantitative understanding of triggering processes is still primitive. The radiation driven implosion (RDI) is the most observationally testable model using bright rimmed clouds (BRCs) on the edges of large HII regions. This combined GTO+GO Chandra ACIS-I proposal is part of our multi-wavelength program to map the IC1396 HII region in order to study contribution of RDI triggered stellar population to the total population of the region. This specific pointing is aimed at studying underlying stellar population of the famous BRC Elephant Trunk nebula.

R.A. Dec. Target Name Det. Grating Exp.Time
21:36:50.30+57:30:24.00IC1396_BRC36ACIS-INONE30

Subject Category: STARS AND WD

Proposal Number: 11200232

Title: RY Tau: A T Tauri Star Driving a Spectacular Jet

PI Name: Stephen Skinner

Jets have been discovered in a diverse range of astronomical objects (protostars, stars, galaxies, AGNs) and play an important role in the transport of mass, energy, and angular momentum. To date, the only example of a bipolar X-ray jet in a T Tauri star (TTS) is DG Tau. We propose here to observe RY Tau, which drives a similar bipolar jet but is a more luminous TTS and a brighter X-ray source. Chandra has the high angular resolution needed to search for jet X-ray emission close to the star and will provide information on jet morphology and physical conditions within the hottest regions of the jet. If the RY Tau jet emits at X-ray levels similar to that of DG Tau, it will be detected.

R.A. Dec. Target Name Det. Grating Exp.Time
04:21:57.40+28:26:35.60RY TauACIS-SNONE60

Subject Category: STARS AND WD

Proposal Number: 11200236

Title: Young Binary DQ Tau: The hunt for X-ray emission from colliding magnetospheres (GO part)

PI Name: Konstantin Getman

The young high eccentricity binary DQ Tau exhibits powerful periodic mm flaring attributed to magnetosphere collisions of binary components. Simultaneous with mm CARMA, we propose combined GTO+GO Chandra ACIS-I3 observation of the periastron passage to search for X-ray emission from colliding magnetospheres. Properties of the discovered X-rays will be compared to those of the known X-rays at the orbital phase away from periastron. To give insights into the mechanism of X-ray production, morphology, energetics, magnetic field strengths, sizes of X-ray emitting coronal structures will be inferred and compared to those of the big COUP X-ray flares (Getman et al. 2008). This project has potential to offer us a different window to the origin of X-rays from young stars.

R.A. Dec. Target Name Det. Grating Exp.Time
04:46:53.10+17:00:00.10DQ TauACIS-INONE30

Subject Category: STARS AND WD

Proposal Number: 11200254

Title: Uncharted Territory in M17: In Search of an Older Generation of Young Stars

PI Name: Matthew Povich

We request a 40-ks ACIS-I pointing northeast of the giant H II region M17. M17 exhibits a unique, bright outflow of hot, wind-shocked plasma. It is located on the rim of a 20-pc diameter wind-blown bubble. This suggests that the young (~1 Myr old) massive NGC 6618 cluster ionizing M17 may have been triggered. We will search for the "trigger," a massive cluster called NGC 6618PG. While NGC 6618PG contains 7 OB stars, it lacks >1 Msun stars with disks, suggesting an age >2 Myr. It is impossible to separate cluster members from field stars using IR imaging alone. We require high-resolution X-ray imaging to address the following questions: Does the cluster exist? Does O star X-ray emission change significantly in a few Myr? What confines the hot plasma from M17 at its northern boundary?

R.A. Dec. Target Name Det. Grating Exp.Time
18:21:11.30-15:58:53.00NGC 6618PGACIS-INONE40

Subject Category: STARS AND WD

Proposal Number: 11200282

Title: New LETGS Observations of Procyon

PI Name: Peter Beiersdorfer

We propose a 140 ksec observation of Procyon with Chandra's LETGS to double the available data. LETGS observations of Procyon are the Rosetta Stone for understanding the emission in the 30-170 A band of cool stars and thus of their coronal physics. The existing LEGTS observations of Procyon have provided evaluations of the EMD, abundances, and the FIP effect based on a handful of lines from K-shell C, N, and O, M-shell Fe and Ni, and L-shell Si, S, and Mg lines. Other lines (e.g., FeXI, FeXII, FeXIII, FeXIV, FeXV, FeXVI), could not be used due to blending. We now can overcome this limitation, allowing us to study Procyon's coronal physics with much higher reliability, check for consistency with EUVE data, and provide critical input for the success of the Solar Dynamics Observatory.

R.A. Dec. Target Name Det. Grating Exp.Time
07:39:18.10+05:13:30.00ProcyonHRC-SLETG140

Subject Category: STARS AND WD

Proposal Number: 11200302

Title: Magnetic Heating of the Outer Atmospheres of Very Low Mass Dwarfs

PI Name: Rachel Osten

The detections of FUV and X-ray emissions from very low mass stars and brown dwarfs have confirmed that stellar magnetic activity can survive even at these low stellar masses. The emissions are qualitatively similar to those from active stars, despite the dramatic differences between the characteristics of It is currently an open question how the structures and magnetic heating which exists in these very low mass stars compare with those seen in higher mass active stars. We propose to take Chandra and HST/COS spectra of two nearby active very low mass stars in order to determine the effect that these large-scale fields have on transition region and coronal structures.

R.A. Dec. Target Name Det. Grating Exp.Time
14:56:38.30-28:09:47.40LHS 3003ACIS-SNONE50
08:53:36.20-03:29:32.10LHS 2065ACIS-SNONE40

Subject Category: STARS AND WD

Proposal Number: 11200317

Title: Probing for multi-TeV particle acceleration towards W28-A2, a highly unusual ultra-compact HII region.

PI Name: Gavin Rowell

The TeV gamma-ray sources in the field of the supernova remnant W28 present a unique opportunity to probe for a new type of multi-TeV particle accelerator - HII regions. Our proposal will observe the TeV source HESSJ1800-240B which is potentially linked to the highly unusual ultra-compact HII region W28A2. Our earlier XMM-Newton observations (badly affected by stray light) reveal point sources towards this region. With Chandra, we can study these X-ray sources in greater detail, and potentially resolve the arc-second scale ionisation ring and molecular outflows. These observations will provide new insight into the potential of very early stages of massive star formation to accelerate multi-TeV particles.

R.A. Dec. Target Name Det. Grating Exp.Time
18:00:27.00-24:03:15.00HESS J1800-240B (X-ray)ACIS-INONE80

Subject Category: STARS AND WD

Proposal Number: 11200332

Title: NeII as a Tracer for X-Rays in Disks Around T Tauri Stars

PI Name: Manuel Guedel

Although dust dominates the appearance of protoplanetary disks, the key processes for disk evolution, angular momentum and mass transport and planetesimal formation are driven through the dynamical state of the gas. In contrast to the dust component in disks, we do not have a similar knowledge of the gas component. One of the Spitzer breakthroughs was the detection of the [Ne II] line, proposed by Glassgold et al. (2007) to be a diagnostic for a warm disk surface layer that is heated and ionized by stellar X-rays. A correlation of the [Ne II] luminosity with the X-ray luminosity is expected. We aim at significantly enlarging the sample, specifically including targets with with transitional disks, low accretion and no jets or outflows.

R.A. Dec. Target Name Det. Grating Exp.Time
04:24:57.10+27:11:56.30IP TauACIS-SNONE17.8
04:39:17.80+22:21:03.50LkCa 15ACIS-SNONE10
04:41:16.80+28:40:00.00CoKu Tau/4ACIS-SNONE10
04:30:04.00+18:13:49.40UX Tau AACIS-SNONE5.3
04:54:23.70+17:09:53.50St 34ACIS-SNONE10
10:18:28.70-31:50:02.90TWA 6ACIS-SNONE1.7
10:42:30.10-33:40:16.20TWA 7ACIS-SNONE1.6
12:35:04.30-41:36:38.60TWA 10ACIS-SNONE3.7
13:20:45.40-46:11:37.70TWA 17ACIS-SNONE6.3

Subject Category: STARS AND WD

Proposal Number: 11200378

Title: X-ray Census of Young Low-Mass Stars Candidates Associated with Gomez's Hamburger

PI Name: Nicolas Grosso

Gomez's Hamburger is a bipolar nebula discovered in 1985 in front of the Galactic bulge that was believed to be a proto-planetary nebula, i.e., illuminated by a post-AGB star. This interpretation was recently challenged by millimetric observations that unveiled a spectacular CO disk in keplerian rotation around an intermediate-mass star. Gomez's Hamburger is a pre main-sequence intermediate-mass star with a circumstellar disk seen edge-on, located at about 300 pc. We propose a 17 ks observation with Chandra ACIS-I to select in X-rays the young low-mass star candidates associated with this object.

R.A. Dec. Target Name Det. Grating Exp.Time
18:09:13.30-32:10:48.00IRAS 18059-3211ACIS-INONE17

Subject Category: STARS AND WD

Proposal Number: 11200418

Title: The nature of GLIMPSE 81: a star cluster to rival Westerlund 1?

PI Name: Donald Figer

Young Massive Clusters (YMCs) are the ideal natural laboratory in which to probe the evolution of very massive stars through to supernova (SN) and beyond. We have identified one such cluster, GLIMPSE 81, which is rich in massive stars and which has been shown by XMM to emit hard X-rays. Here, we will use Chandra to resolve this emission and determine the relative contributions of massive binaries, post-SN objects (e.g. neutron stars), accreting relativistic binaries, and the diffuse emission of recent SNe. Ultimately, we will test the results from a similar study of Westerlund 1 that massive stars in clusters have binary fractions close to 100%. Further, we will use GLIMPSE 81 to provide links between massive stars and post-SN remnants, such as that of the nearby TeV source HESS~J1640.

R.A. Dec. Target Name Det. Grating Exp.Time
16:40:29.60-46:23:25.80GLIMPSE81ACIS-INONE40

Subject Category: STARS AND WD

Proposal Number: 11200420

Title: New Thrust for Jets: Understanding the Physics of Young Stellar Jets and Outflows

PI Name: Manuel Guedel

We propose a deep ACIS observation of the jet system of the classical T Tauri star DG Tau. DG Tau is so far unique because both its jet and counter-jet have been detected in X-rays. We will study jet structure, temperatures and proper motions of the sources and model the heating, propagation, and cooling physics of the hot plasma jets. The system orientation allows the counter-jet to be viewed through the circumstellar disk. X-ray absorption by the disk gas can thus be reliably determined and be used, together with optical information, to determine the gas-to-dust ratio in the disk. We will request radio (VLA) observations for complementary imaging, and near-IR (VLT) observing time for high-resolution spectroscopy to characterize the jet shocks and measure extinction along the jets.

R.A. Dec. Target Name Det. Grating Exp.Time
04:27:04.70+26:06:16.20DG TauACIS-SNONE360

Subject Category: STARS AND WD

Proposal Number: 11200435

Title: The Stars and Edge-on Disks of PDS 144: An Intermediate-Mass Analog of Wide T Tauri Multiple Stars

High-Inclination PMS stars are optimally oriented to measure disk size, height, to detect jets, and to directly probe disk composition. Placing these data into evolutionary context requires dates for the systems and measurements of L_bol, and extinction. For such stars, X-ray data provide L_x, but also N(H) and the total extinction. FUV data measures L_UV, and constrains the shape of the extinction curve. Recent studies have suggested that the frequency of Jovian-mass planets is higher for systems with intermediate-mass stars, due to disk mass or composition. While suitable low mass YSOs are well-represented in the Chandra and HST archives, similar data are lacking for higher mass systems. We propose joint Chandra and HST imaging of PDS 144 to fill this gap.

R.A. Dec. Target Name Det. Grating Exp.Time
15:49:15.40-26:00:52.50PDS 144ACIS-SNONE40

Subject Category: STARS AND WD

Proposal Number: 11200492

Title: A Chandra Snapshot of Serpens South

PI Name: Elaine Winston

We propose a 100ks observation of the recently discovered Serpens South, a densely populated, extremely young cluster. Our Spitzer data have identified 91 young stars in the region, 54 protostars and 37 Class II YSOs. This is one of the highest protostar fractions known in a YSC. Observations of the region with Chandra will allow us to identify the diskless Class III population of the cluster. They will also provide X-ray data of previously identified YSOs, allowing us to examine X-ray properties with evolutionary class and to study the spatial distribution of YSOs within the cluster. These observations will also compliment data from our Spitzer Warm Mission Program: YSOVAR, which will provide deep, multi-epoch mid-IR data of Serpens South.

R.A. Dec. Target Name Det. Grating Exp.Time
18:30:03.00-02:01:58.20Serpens SouthACIS-INONE100

Subject Category: STARS AND WD

Proposal Number: 11200496

Title: Exploring a New Stellar X-ray Frontier: Investigating the X-ray Emissions of RR Lyr Variables

PI Name: Edward Guinan

Early theoretical predictions & spectroscopy suggest RR Lyr & Cepheids should be soft X-ray sources (pulsation-induced shocks). Yet no definite X-ray detections were made until the last 2 years when we discovered 3 Cepheids in X-rays (Lx ~ 10^29 ergs/s), likely caused by shock-heated plasmas. With shorter pulsation periods & more rapid atmospheric motions, RR Lyr should be stronger X-ray sources. In this pilot program we request a 50 ksec exposure (to cover the star's P ~13.5 hr pulsation period) to examine if RR Lyr variables join Cepheids as soft X-ray sources. We have selected the proto-type, RR Lyr itself, as the 1st target. These observations will shed new light on the structure, dynamics and heating of the atmospheres of this fundamentally important class of pulsating stars.

R.A. Dec. Target Name Det. Grating Exp.Time
19:25:27.90+42:47:03.60RR LyrACIS-SNONE20

Subject Category: STARS AND WD

Proposal Number: 11200609

Title: X-ray emission from the fast rotating A7 star Altair

We propose to observe the low activity star Altair with the Chandra LETGS. With a spectral type of A7, the very fast rotator Altair is the earliest, magnetically active, single late-type star detected by ROSAT and Einstein. Its X-ray luminosity is low and the activity level as expressed by the L_X/L_bol ratio is the lowest measured in any nearby star. Being located at a distance of only 5 pc, Altair is a unique target to study the X-ray properties of late A-type stars in greater detail. The proposed 100 ks observation will enable us to investigate the cool corona of a star with a very shallow convection zone in this spectral range. We expect to measure rotationally broadened stellar emission lines in the X-ray regime for the first time.

R.A. Dec. Target Name Det. Grating Exp.Time
19:50:47.30+08:52:09.40AltairHRC-SLETG100

Subject Category: STARS AND WD

Proposal Number: 11200621

Title: Resolving the time-evolution of the HH 154 X-ray emission

PI Name: Christian Schneider

We propose to add to the available two Chandra images of HH 154 a new ACIS-S pointing of 70 ks to obtain a time-series with a baseline of nine years. The available data suggests two different X-ray emission components close to the heavily obscured driving source; one of these X-ray components might be associated with a knot in the HH-object while the nature of the seemingly stationary and more luminous component is still unclear. We want to clarify the structure of the X-ray emitting volume(s) to understand the physics of stellar outflows (e.g. collimation) and their interaction with the ambient medium (e.g. the role of turbulence). The new observation has the potential to solve pressing problems related to the production of X-rays within Herbig-Haro objects.

R.A. Dec. Target Name Det. Grating Exp.Time
04:31:34.10+18:08:03.80HH 154ACIS-SNONE70

Subject Category: STARS AND WD

Proposal Number: 11200668

Title: Monitoring Dynamical Mass Loss from Eta Car with the HETG

PI Name: Michael Corcoran

Eta Car is a key object for understanding how mass and angular momentum change as a star heads towards hypernova. Periodic minima in X-rays and other wavebands show it as an extremely eccentric binary with a massive companion. A surprising change in the X-ray emission during the January 2009 X-ray minimum probably indicates a large-scale variation in the system mass loss which implies a significant change in the luminosity of one of the stars. X-ray line profiles are the best diagnostic of the wind-wind collision and the structure of the interacting winds. We propose to obtain HETGS spectra of the system during AO11 in a phase interval never before sampled, along with STIS mapping which will constrain the 3-D shape of the wind-wind interaction regions on scales of 1-1000AU.

R.A. Dec. Target Name Det. Grating Exp.Time
10:45:03.60-59:41:04.30Eta CarACIS-SHETG160

Subject Category: STARS AND WD

Proposal Number: 11200698

Title: The Chandra Cygnus OB2 Survey

PI Name: Jeremy Drake

Understanding massive "starburst" clusters is crucial for the first stars, starburst galaxies, galactic and ISM evolution, and star and planet formation on universal and galactic scales. But Galactic superclusters are generally too distant for detailed study. Recent awareness that Cygnus OB2 (1.5kpc; ~2Myr old) has supercluster characteristics has sparked a multiwavelength legacy effort exploiting its proximity to study starburst astrophysics. This Chandra Legacy project will provide an exquisite vision of the anatomy of a massive "collapse" mode of star formation, allowing detailed archeology of its history and content. 8000-10000 detections down to 0.1Msun will incisively test theories of giant molecular cloud collapse, massive star formation and protoplanetary disk evolution.

R.A. Dec. Target Name Det. Grating Exp.Time
20:33:12.00+41:19:00.00Cygnus OB2ACIS-INONE1080

Subject Category: STARS AND WD

Proposal Number: 11200702

Title: Rethinking the rotation-activity classifications of cool single and binary stars

PI Name: Soren Meibom

The traditional Rossby Number based classification of cool stars into normal, saturated, and supersaturated, bears some resemblance to the striking (C/g/I) sequences seen in carefully constructed color-period diagrams of open clusters - but there are significant differences. These differences could be clues to understanding the dynamo transitions of cool stars, and to understand whether binaries fit within the classification scheme. We propose here to explore the rotation-activity classifications of cool single and binary stars using Chandra ACIS-I spectra of coronae in the rich, nearby open cluster M35 (exceptionally well-studied for rotation periods, membership and binary orbits). We will explore how the coronal flux and temperature change across the various proposed classifications.

R.A. Dec. Target Name Det. Grating Exp.Time
06:09:10.00+24:22:31.50M35ACIS-INONE130

Subject Category: STARS AND WD

Proposal Number: 11200754

Title: ACIS IMAGING SPECTROSCOPY OF T TAURI STARS IN THE HST/COS CYCLE 17 LARGE PROJECT SAMPLE

PI Name: ALEXANDER BROWN

High energy (X-ray+UV) radiation from young stars profoundly influences physical and chemical processes in their circumstellar environment. Gas and dust in protoplanetary systems are excited by these photons, which are the dominant ionization source for hundreds of AU around the star. X-rays penetrate deep into disks and power complex chemistry on grain surfaces. We have been awarded 111 HST orbits to conduct a Large Project to observe the UV spectra of a carefully chosen sample of 31 young stars with COS and STIS. Modeling the effects of their high energy radiation requires BOTH UV and X-ray spectra for this sample. We propose to use ACIS-S to obtain CCD-resolution spectra for the FIVE stars in this sample that currently have not been observed by either Chandra or XMM-Newton.

R.A. Dec. Target Name Det. Grating Exp.Time
04:21:55.70+27:55:06.20DE TauACIS-SNONE20
04:16:28.10+28:07:35.70LkCa 4ACIS-SNONE20

Subject Category: STARS AND WD

Proposal Number: 11200793

Title: X-ray emission mechanism in the Be star HD 42054

PI Name: Paola Testa

We propose to obtain a HETGS spectrum of the Be star HD 42054 to investigate the X-ray emission mechanisms in this mid B-type emission line star characterized by hot and variable X-ray thermal emission. This study, through detailed line-based diagnostics accessible only with high resolution spectroscopy, will allow us to shed light into the issue of X-ray emission from Be stars. Remarkably, beta Cephei is the only Be star to date for which high-resolution X-ray spectra have been obtained, excluding the very peculiar class of gamma Cas analogs.

R.A. Dec. Target Name Det. Grating Exp.Time
06:07:03.70-34:18:43.30HD 42054ACIS-SHETG150

Subject Category: STARS AND WD

Proposal Number: 11200837

Title: SLEUTHING THE MAGNETIC DYNAMO IN METAL-POOR STARS

PI Name: Andrea Dupree

Metal-poor stars on the red horizontal branch (RHB) have convective cores and semi-convective envelopes allowing for dynamo activity. The strong infrared He I line (10830A) we have detected in RHB field objects suggests also that X-ray emission is present to create the surprisingly strong helium absorption, yet no X-ray observations exist of this category of star. Discovery of X-rays from RHB objects will demonstrate for the first time that magnetic fields are present in normal Population II stars, provide a driving mechanism for the stellar winds indicated by line profiles, and have implications for globular clusters too, with respect to the 2nd parameter problem, and missing intracluster material.

R.A. Dec. Target Name Det. Grating Exp.Time
13:43:26.70+15:34:31.00HD 119516ACIS-SNONE15

Subject Category: STARS AND WD

Proposal Number: 11200899

Title: Measuring X-ray Heating of Circumstellar Disks: Linking Stellar X-ray Flares With Mid-IR Disk Afterglows

PI Name: Kevin Covey

We propose to obtain Chandra ACIS-I observations of two young clusters, IC1396A and Ceph C, to test theoretical predictions of X-ray heating in circumstellar disks. Leveraging this Chandra data with extensive mid-IR light curves from our Spitzer Warm Mission program (YSOVAR), we will: 1) test if YSO X-ray and mid-IR variability are statistically correlated, indicating that stellar X-ray emission heats disks significantly, and 2) test if disk accretion rates rise following stellar X-ray flares, as expected from disk accretion models driven by magneto-rotational instabilities. Ancillary science includes: A) identification of weak T Tauri stars, to study their mid-IR variability; B) cluster extinction measurements; and C) LX/rotation relations with mid-IR periods for embedded protostars.

R.A. Dec. Target Name Det. Grating Exp.Time
23:05:51.00+62:30:55.00Ceph CACIS-INONE48

Subject Category: WD BINARIES AND CV

Proposal Number: 11300009

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 5x18.4ks XMM-Newton EPIC and 5x18.4ks Chandra HRC-I observations equally distributed from Nov 2009 to mid Feb 2010 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 SNIa 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 white dwarf masses. We will also monitor time variability of ~200 M31 X-ray sources (mostly XRBs).

R.A. Dec. Target Name Det. Grating Exp.Time
00:42:44.30+41:16:09.40M31HRC-INONE92

Subject Category: WD BINARIES AND CV

Proposal Number: 11300022

Title: Resolving short supersoft source states

PI Name: Peter Predehl

We propose to extend our monitoring of the M31 core by two 20 ks Chandra HRC-I observations to determine light curves of the 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. 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 duration of nova SSS states will allow us to constrain envelope and white dwarf masses. At the same time we will monitor time variability of ~200 X-ray sources (mostly XRBs) in the central area of M31.

R.A. Dec. Target Name Det. Grating Exp.Time
00:42:44.30+41:16:09.40M31HRC-INONE37

Subject Category: WD BINARIES AND CV

Proposal Number: 11300122

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. This is a continuation of a TOO proposal accepted in Cycle 10.

R.A. Dec. Target Name Det. Grating Exp.Time
19:24:33.10+50:14:29.10CH CygniACIS-SHETG100

Subject Category: WD BINARIES AND CV

Proposal Number: 11300491

Title: Primordial formation of close binaries in globular clusters with low desity cores

PI Name: Albert Kong

The primordial binary population is a key input parameter for any realistic model of dense star cluster dynamics. However, the number of primordial binaries and its direct implications for the formation rate of close binaries remain poorly understood. Theoretical calculations show that cataclysmic variables can be formed directly from primordial binaries in or near the core of low core density globular clusters. We propose to use Chandra/HST to study low density core globular clusters systematically and to test the prediction that low-luminosity X-ray sources can be formed from primordial binaries in the cluster core. This project will complement our successful Chandra/HST program to study the dynamical formation of X-ray sources in high core density globular clusters.

R.A. Dec. Target Name Det. Grating Exp.Time
17:31:54.90-67:02:52.30NGC6362ACIS-SNONE40
18:03:50.60-00:17:48.90NGC6535ACIS-SNONE53
16:28:40.10-35:21:13.00Terzan 3ACIS-SNONE68

Subject Category: WD BINARIES AND CV

Proposal Number: 11300603

Title: High Resolution Spectroscopy of RX J0806.3+1527

PI Name: Tod Strohmayer

RX J0806.3+1527 (HM Cnc) is a candidate double degenerate binary with possibly the shortest known orbital period. We recently obtained the first high resolution X-ray spectrum of the source with an 80 ksec LETG/HRC-S exposure. This spectrum shows the first emission lines ever detected from the system, with a strong detection of an emission feature centered at 27 Angstrom, and indications of weaker emission lines in the 30 - 50 range. The spectrum does not show strong emission lines of typically abundant elements such as carbon, nitrogen, oxygen, and neon. We propose deeper follow-up observations to confirm the tentative line detections and enable elemental identifications and abundances to constrain the formation and binary evolution history of the source.

R.A. Dec. Target Name Det. Grating Exp.Time
08:06:23.20+15:27:30.20RX J0806.3+1527HRC-SLETG200

Subject Category: WD BINARIES AND CV

Proposal Number: 11300610

Title: Deep X-ray observations of the Globular Cluster M15: A complete census of the interacting binary population

PI Name: Andrea Dieball

We propose to carry out deep 100 ksec X-ray observations of the globular cluster (GC) M15 with Chandra. M15 has been extensively observed in the far-ultraviolet (FUV) with HST, yielding one of the deepest FUV surveys of a GC to date. Our deep X-ray observations will allow us to (i) find X-ray counterparts to the FUV white dwarf - main sequence star binaries, thus identifying and confirming the cataclysmic variables amongst them; (ii) detect the X-ray faint interacting binaries in this cluster; (iii) detect X-ray counterparts to the pulsars known in the cluster; (iv) classify all X-ray sources based on their X-ray, FUV, NUV and optical properties; (v) and finally test models for IB formation and evolution and verify the empirical results emerging from previous work on other GCs.

R.A. Dec. Target Name Det. Grating Exp.Time
21:29:58.30+12:10:01.00M15ACIS-SNONE100

Subject Category: WD BINARIES AND CV

Proposal Number: 11300893

Title: Binary Formation in the Sparse Galactic Globular Cluster NGC 3021

PI Name: Gregory Sivakoff

Bright X-ray sources in globular clusters, X-ray binaries, cataclysmic variables, active binaries, and millisecond pulsars, are all binary systems or thought to be the products of such systems. Studies of X-ray sources in GCs thus probe binary formation. Most past observations have concentrated on dense GCs; these systems show clear evidence for strong dynamical formation of binaries; however, sparse clusters seem to fall off this pattern. Potential explanantions include, among others, primordial binary formation and a misunderstanding of the dynamical state of some GCs. We propose an 85 ks ACIS-S observation of NGC~3201, the nearest sparse GC unobserved by Chandra to test these explanations. We request 1 orbit of HST to discriminate CVs from ABs, and 1 hour of GBT time to search for MSPs.

R.A. Dec. Target Name Det. Grating Exp.Time
10:17:36.80-46:24:40.00NGC 3021ACIS-SNONE85

Subject Category: BH AND NS BINARIES

Proposal Number: 11400006

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

PI Name: Jelle Kaastra

We propose to obtain a 2 ks 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
INTEGRAL persistent weak ToOACIS-INONE2
INTEGRAL persistent weak ToOACIS-INONE2

Subject Category: BH AND NS BINARIES

Proposal Number: 11400006

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

PI Name: Jelle Kaastra

We propose to obtain a 2 ks 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
INTEGRAL persistent weak ToOACIS-INONE2
INTEGRAL persistent weak ToOACIS-INONE2

Subject Category: BH AND NS BINARIES

Proposal Number: 11400007

Title: The mechanism of jet formation in Cyg X-2 and the nature of the hot ADC

PI Name: MICHAEL CHURCH

The Z-track source Cygnus X-2 has relativistic jets essentially in only one of its three states allowing us to find conditions at the inner disk needed for jet formation. The applicants recently made breakthroughs, proposing from continuum analysis a model for the Z-track and jet formation and secondly mapping highly ionized ADC line features around the Z indicating that the mass accretion rate increases in the sense opposite to that shown by the continuum. The crux of understanding the 3 states, jet formation and line formation in the ADC is finding the direction of Mdot increase and we propose to do this by obtaining the evolution of continuum and lines over a complete Z-track movement with XMM and Chandra.

R.A. Dec. Target Name Det. Grating Exp.Time
21:44:41.20+38:19:18.00Cygnus X-2ACIS-SHETG72

Subject Category: BH AND NS BINARIES

Proposal Number: 11400012

Title: Chandra follow-up of X-ray sources in interacting galaxies

PI Name: Jelle Kaastra

We propose to obtain short exposures of a sample of unclassified sources that are found in interacting galaxies. 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. The ACIS sensitivity for hard sources is best while pile-up is not a major concern for source localization.

R.A. Dec. Target Name Det. Grating Exp.Time
08:53:12.40+16:26:19.50SDSSJ085312.3+162619ACIS-SNONE2
13:51:54.10+64:22:12.80SDSSJ135154.1+642212ACIS-SNONE4

Subject Category: BH AND NS BINARIES

Proposal Number: 11400037

Title: Observe Bright Atol Sources at High Mass Accretion Rates

PI Name: Claude Canizares

GX 13+1 has some history of line absorption in the Fe K region with XMM and Chandra. We want to confirm the existence of blue-shifted absorption, detect line flux and shift variability possibly in correlation with its spectral (banana) branch and source luminosity, as well as verify and investigate some unusual line detections ( i.e. Cr XXIV, Mn XXV). We employ a strategy of 5 x ~30 ks observations scattered over longer time spans with the goal to cover as much of the banana branch as possible. The ~30 ks length of each observation guarantees the same detection significance as in the existing observation.

R.A. Dec. Target Name Det. Grating Exp.Time
18:14:31.60-17:09:26.70GX 13+1ACIS-SHETG29
18:14:31.60-17:09:26.70GX 13+1ACIS-SHETG29
18:14:31.60-17:09:26.70GX 13+1ACIS-SHETG29
18:14:31.60-17:09:26.70GX 13+1ACIS-SHETG29
18:14:31.60-17:09:26.70GX 13+1ACIS-SHETG30

Subject Category: BH AND NS BINARIES

Proposal Number: 11400046

Title: Confirming the Proper Motion of the Neutron Star in Puppis-A

PI Name: Peter Predehl

We propose to observe the Neutron Star in Puppis-A using the Chandra HRC-I to confirm its proper motion.

R.A. Dec. Target Name Det. Grating Exp.Time
08:21:57.50-43:00:15.70RXJ0822-4300HRC-INONE33.5

Subject Category: BH AND NS BINARIES

Proposal Number: 11400085

Title: An Irradiated Disk in an Ultraluminous X-Ray Source

PI Name: Philip Kaaret

Whether ultraluminous X-ray sources (ULXs) contain stellar-mass or intermediate-mass black holes is an important, but as yet unresolved question. We have discovered variable optical emission from the ULX NGC 5408 X-1 that we interpret as reprocessed emission in an irradiated disk. We propose simultaneous observations with Chandra and HST to test this interpretation and place constraints on the geometry of the accretion disk. The results should help determine the nature of the compact object.

R.A. Dec. Target Name Det. Grating Exp.Time
14:03:19.60-41:22:58.50NGC 5408 X-1ACIS-SNONE36

Subject Category: BH AND NS BINARIES

Proposal Number: 11400118

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
16:12:43.00-52:25:23.204U 1608-522ACIS-SNONE60

Subject Category: BH AND NS BINARIES

Proposal Number: 11400170

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
X-ray JetsACIS-SNONE150

Subject Category: BH AND NS BINARIES

Proposal Number: 11400172

Title: A Chandra survey of quiescent black hole X-ray binaries

PI Name: Albert Kong

We propose to detect quiescent X-ray emission and jets from three quiescent black holes, H 1705-250, GRS 1009-45, 4U 1543-47, with ACIS-S observations. Our proposed observations will allow us: 1) to test the prediction of the ADAF model to distinguish black hole and neutron star systems, and strengthen the evidence of the existence of event horizon; 2) to provide strong proof that accretion continues in quiescent black hole, and 3) to test if black hole systems require outflows.

R.A. Dec. Target Name Det. Grating Exp.Time
17:08:14.60-25:05:29.00H1705-250ACIS-SNONE50

Subject Category: BH AND NS BINARIES

Proposal Number: 11400197

Title: INVESTIGATING NEW INTEGRAL SOURCES WITH CHANDRA

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
New INTEGRAL source 1ACIS-SHETG20
New INTEGRAL source 2ACIS-SHETG20

Subject Category: BH AND NS BINARIES

Proposal Number: 11400205

Title: Cygnus X-1 Viewed Outside of its Secondary's Wind

PI Name: Michael Nowak

We propose to conduct a dedicated 30 ksec (0.06 of orbital phase) HETG observation of Cyg X-1 near orbital phase 0.5 (in TE mode, if reasonable). This orbital phase-dependent observation is designed to provide the greatest contrast with our existing dipping phase (orbital phase 0) observations, and thereby reveal the absorbing wind of the secondary at its minimum. The observation will allow us to view the secondary wind at its least dense, but most blueshifted points. Aside from further elucidating the structure of the wind, this will also give us our most unfettered view of the soft excess and Fe line region emanating from the black hole's accretion disk.

R.A. Dec. Target Name Det. Grating Exp.Time
19:58:21.70+35:12:05.80Cyg X-1ACIS-SHETG30

Subject Category: BH AND NS BINARIES

Proposal Number: 11400239

Title: X-ray Column Density Towards the Low Mass X-ray Binary 4U 1702-429

PI Name: Tolga Guver

We request a 50 ks observation of the low-mass X-ray binary 4U 1702-429 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
17:06:15.30-43:02:08.604U 1702-429ACIS-SHETG50

Subject Category: BH AND NS BINARIES

Proposal Number: 11400250

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 17-year-long outburst end during the 11th Chandra observing cycle. This system has never been observed in quiescence: its properties suggest that its quiescent X-ray luminosity 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+10:56:44.00GRS 1915+105ACIS-INONE80

Subject Category: BH AND NS BINARIES

Proposal Number: 11400295

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
Black Hole TransientACIS-SHETG60

Subject Category: BH AND NS BINARIES

Proposal Number: 11400306

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
17:48:52.70-20:21:37.00NGC 6440ACIS-SNONE2.5
17:48:04.90-24:46:45.00Terzan 5ACIS-SNONE10
17:35:47.20-30:28:54.00Terzan 1ACIS-SNONE10

Subject Category: BH AND NS BINARIES

Proposal Number: 11400329

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 request 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
TOOACIS-SNONE157

Subject Category: BH AND NS BINARIES

Proposal Number: 11400331

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

PI Name: Isabelle Grenier

We propose a TOO observation of one bright Galactic transient detected by the Fermi 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
Fermi TransientACIS-SNONE30

Subject Category: BH AND NS BINARIES

Proposal Number: 11400336

Title: Spectroscopy of the Resurgent Ultracompact Binary 4U 1626-67

PI Name: Deepto Chakrabarty

Chandra/XMM spectroscopy of this X-ray pulsar finds Doppler pairs of broad Ne and O emission lines, the first detection of a Keplerian line profiles in the X-ray. Recently, the 30-yr decline in X-ray intensity has reversed, with the source doubling in brightness in the past year along with a significant spectral change. We propose HETGS spectroscopy of this new bright state to use the emission line intensity and profiles to probe the geometry and physical conditions of the accretion flow, and also to constrain the unusual composition of the white dwarf donor. We will also make a first crude attempt to apply Doppler tomography to the strongest lines. These analyses may shed light on the bizarre pulsar torque reversal that accompanied the previous spectral change of the source in 1990.

R.A. Dec. Target Name Det. Grating Exp.Time
16:32:16.70-67:27:42.004U 1626-67ACIS-SHETG80

Subject Category: BH AND NS BINARIES

Proposal Number: 11400354

Title: Crustal cooling of the neutron star in EXO 0748-676

PI Name: Nathalie Degenaar

We propose two 30-ksec Chandra observations to continue our successful monitoring program of the crust cooling of the quasi-persistent neutron star X-ray transient EXO 0748-676. This source has recently started the transition to quiescence following an extended period of accretion that lasted more than 24 years. Studying the thermal relaxation of the accretion-heated neutron star provides the unique opportunity to test new theoretical conjectures that deal with the behavior of matter in the extreme density and pressure environment of the neutron star interior.

R.A. Dec. Target Name Det. Grating Exp.Time
07:48:33.80-67:45:08.60EXO 0748-676ACIS-SNONE60

Subject Category: BH AND NS BINARIES

Proposal Number: 11400372

Title: The crust cooling of HETE J1900.1-2455

PI Name: Nathalie Degenaar

We propose a series of three 30-ksec Chandra ToO observations of the neutron star quasi-persistent X-ray binary HETE J1900.1-2455 once it returns to quiescence. Currently, the source undergoes an extended episode of accretion that started about 3.5 years ago. HETE J1900.1-2455 is the only quasi-persistent neutron star binary currently in outburst from which X-ray pulsations have been detected and that has a high inferred magnetic field. Studying the cooling of the accretion-heated neutron star once HETE J1900.1-2455 returns to quiescence provides an unique opportunity to investigate a variety of processes occurring under extreme density and pressure conditions. In particular, it allows us to test the possible effects of a high magnetic field on the thermal evolution of the neutron star.

R.A. Dec. Target Name Det. Grating Exp.Time
19:00:08.70-24:55:13.70HETE J1900.1-2455ACIS-SNONE90

Subject Category: BH AND NS BINARIES

Proposal Number: 11400393

Title: Identifying the nature of the compact object in Swift J1753.5-0127

PI Name: Alessandro Patruno

We propose to observe the X-ray binary Swift J1753.5-0127 with a 30 ks observation, should the source end its current 4-year-long outburst. Despite several multi-wavelength monitoring campaigns, the nature of the compact object in the binary is still unknown. The system has been accreting matter at a relatively high rate (M_dot~10^-10 M_sun/yr) for more than 4 years. Current models predict a high quiescence luminosity (~10^32-10^33 erg/s) and clear signatures (thermal emission) of a heated crust, if the binary hosts a neutron star. If the system contains a black hole, such signatures will not be detected and the source will rapidly fade down to its predicted quiescent luminosity (~10^30-10^31 erg/s).

R.A. Dec. Target Name Det. Grating Exp.Time
17:53:28.30-01:27:09.00Swift J1753.5-0127ACIS-SNONE30

Subject Category: BH AND NS BINARIES

Proposal Number: 11400526

Title: Precise Positions of Historically Bright X-ray Binaries

PI Name: Alan Levine

We propose to obtain brief observations of historically bright sources which are or may be X-ray binaries in order to obtain precise X-ray locations. The sources are the HMXBs XTE J1543-568, 4U1901+03, and GS0834-430, the LMXB GS 0836-429, and the unclassified sources SAX J1428.6-5422, XTE J1837+037, and IGR J21117+3427. Precise locations are needed for the identification of optical/IR counterparts to five of these and for the confirmation of previously proposed optical/IR identifications of two of the sources. Precise locations are also used in the analysis of data from X-ray sky monitors. None of these sources is currently bright enough to be clearly detected by the RXTE ASM, but each could be sufficiently bright to be unambiguously detected in a Chandra/ACIS image.

R.A. Dec. Target Name Det. Grating Exp.Time
15:44:01.00-56:45:54.00XTE J1543-568ACIS-INONE1
19:03:37.10+03:11:30.804U1901+03ACIS-INONE4
08:35:55.40-43:11:11.80GS0834-430ACIS-INONE1
08:37:23.60-42:54:01.80GS0836-429ACIS-INONE1
14:28:38.40-54:22:22.80SAX J1428.6-5422ACIS-INONE1
18:36:36.00+03:42:00.00XTE J1837+037ACIS-INONE1
21:11:47.50+34:27:43.20IGR J21117+3427ACIS-INONE1

Subject Category: BH AND NS BINARIES

Proposal Number: 11400637

Title: Disk wind and jets in the neutron star binary GX9+9

PI Name: Simone Migliari

We propose a 100 ks Chandra/HETGS observation of the bright neutron star low-mass X-ray binary (LMXB) GX~9+9, simultaneous with a 7 h radio observation with the VLA at 8 GHz. We will investigate the presence of X-ray narrow absorption/emission features in the Chandra spectra, which are a signature of a disk wind, and the connection of the wind with the presence of radio jet emission. The unique capabilities of Chandra/HETGS provide sufficient spectral resolution and sensitivity to study the detailed properties of the disk wind, its geometrical distribution and dynamics and its relation with the binary parameters. The VLA observations will probe the jet power as a function of the wind strength and plasma properties and the radio/X-ray flux relation in bright atoll NSs.

R.A. Dec. Target Name Det. Grating Exp.Time
17:31:44.20-16:57:42.00GX 9+9ACIS-SHETG100

Subject Category: BH AND NS BINARIES

Proposal Number: 11400651

Title: Quiescent Low Mass X-Ray Binaries and Cataclysmic Variables in the Globular Cluster NGC 6304

PI Name: Robert Rutledge

The radii of neutron stars are now routinely measured in transient low-mass X-ray binaries (LMXBs) in globular clusters. Only a hand full of such systems are firmly identified, and more are needed to produce a usefully large population for constraining the dense matter equation of state. We propose here an observation of three X-ray sources in NGC 6304, recently spectrally classified as quiescent LMXBs. The primary goal of this proposal is to confirm the qLMXB nature of these sources by obtaining CCD-spectra to produce H-atmosphere radius measurements accurate to ~20-25 %. Confirming the classification of these sources may challenge the theory of binary formation in globular clusters. The secondary goal is a deep survey of the CV population in NGC 6304

R.A. Dec. Target Name Det. Grating Exp.Time
17:14:32.90-29:27:48.20NGC 6304ACIS-INONE100

Subject Category: BH AND NS BINARIES

Proposal Number: 11400669

Title: Deep Chandra Observations of the Black Hole LMC X-1

PI Name: Michael Nowak

We propose Chandra-HETG observations of LMC X-1, totaling 150 ksec (3-5 separate observations). Our goals are to 1) search for spectroscopic evidence of (likely highly ionized) wind-fed accretion in this system, 2) accurately determine the column density and elemental abundances for this sightline (a combination of the LMC column and absorption local to the system, the latter of which might be variable), 3) carefully model the disk spectrum from 0.4-8\,keV, and 4) use the LMC X-1 spectrum to probe the warm/hot phases of the Galactic halo interstellar medium (ISM).

R.A. Dec. Target Name Det. Grating Exp.Time
05:39:38.80-69:44:35.70LMC X-1ACIS-SHETG150

Subject Category: BH AND NS BINARIES

Proposal Number: 11400764

Title: PSR J1023+0038: Tracing the Accretion History of a Missing Link'

PI Name: Duncan Lorimer

We propose to observe the recently discovered binary millisecond radio pulsar in the field of the Galaxy, PSR J1023+0038, that appears to be a long sought-after "missing-link" between low-mass X-ray binaries and radio millisecond pulsars. This binary, which has shown evidence for recent accretion, can serve as a unique laboratory for studies of the poorly understood transition mechanism of millisecond pulsars from accretion to rotation power. Resolving the spatial structure of any pulsar wind-driven nebular X-ray emission could reveal information regarding past accretion episodes in this system. Studying the non-thermal X-ray emission from within the binary may offer evidence for any remnant of an accretion disc interacting with the pulsar wind.

R.A. Dec. Target Name Det. Grating Exp.Time
10:23:47.70+00:38:41.20PSR J1023+0038ACIS-SNONE86

Subject Category: BH AND NS BINARIES

Proposal Number: 11400785

Title: Precise Localization of Transient Low-Mass X-ray Binaries

PI Name: Deepto Chakrabarty

We propose to observe four neutron star or black hole soft X-ray transients (SXTs) in outburst to obtain accurate source positions, continuing a successful multi-year program in place since Cycle 6. These positions will allow reobservation of these sources in the X-ray, optical, and IR in order to study their quiescence 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 insufficient.

R.A. Dec. Target Name Det. Grating Exp.Time
SXT 1HRC-SNONE1
SXT 1HRC-SNONE1
SXT 1HRC-SNONE1
SXT 1HRC-SNONE1

Subject Category: BH AND NS BINARIES

Proposal Number: 11400795

Title: X-Ray Binaries In a Nearby Star-Burst Galaxy: A New Lab for Astrophysics.

PI Name: Silas Laycock

We propose to study the population of High-Mass X-ray Binaries and Black-Hole X-Ray transients in a young Star-Burst. By means of regular monitoring, HMXBs will be identified during their regular outbursts at logLx>36 erg/s and orbital periods estimated for many. The optical novae accompanying BHXRTs brighter than LogLx>38 erg/s will be caught by HST to determine their binary parameters. Comparison with the Galaxy, M31 and the Magellanic Clouds will provide a direct and powerful demonstration of the role of age and environment in the evolution of the XRB populations of star forming galaxies, as a function of metallicity and star-formation rate.

R.A. Dec. Target Name Det. Grating Exp.Time
00:20:17.30+59:18:13.60IC 10ACIS-SNONE105

Subject Category: BH AND NS BINARIES

Proposal Number: 11400809

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 successful 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 returning to quiescence. The goal of the Cycle 11 observations is to follow the cooling of the surprisingly hot neutron star in unprecedented detail and possibly catch the moment at which thermal equilibrium is reached; we also study the evolution of the enigmatic non-thermal spectral component. We reduce our sampling to two observations in Cycle 11 and request two 55 ks ACIS-S observations.

R.A. Dec. Target Name Det. Grating Exp.Time
17:00:58.50-46:11:08.60XTE J1701-462ACIS-SNONE55

Subject Category: BH AND NS BINARIES

Proposal Number: 11400864

Title: Determining the Properties of Intervening Gas and Dust along the GX 17+2 Line-of-sight

PI Name: Jingen Xiang

We propose a 40 ks (30 ks in TE mode followed by 10 ks in CC mode) Chandra-HETGS observation of the LMXB GX 17+2, to facilitate three independent science goals: (1) a determination of the composition and quantity of interstellar dust along the GX 17+2 line-of-sight (LOS) / in its environment, (2) a study of the size and spatial distribution of the dust grains along this LOS via X-ray scattering halo studies, and (3) a quantification of the extent to which CC-mode observations of bright binaries cannot be trusted for absorption column determinations.

R.A. Dec. Target Name Det. Grating Exp.Time
18:16:01.40-14:02:11.00GX 17+2ACIS-SHETG40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500004

Title: Young, hot PSR J1357-6429 and its PWN

PI Name: George Pavlov

Observations of thermal components in the X-ray spectra of young pulsars provide insights into fundamental physics of neutron star interiors and magnetospheres. A short XMM-Newton exposure of the 7 kyr old PSR J1357-6429 has revealed thermal emission from the NS surface and an elongated diffuse feature extending from the pulsar, most likely a pulsar wind nebula (PWN). Observations with Chandra HRC-S have have provided tentative detections of a compact PWN and pulsations. Here we propose a detailed study of the pulsar's spectral and timing properties, and deep imaging and spectroscopy of the PWN with XMM-Newton and Chandra.

R.A. Dec. Target Name Det. Grating Exp.Time
13:57:02.40-64:29:30.20PSR J1357-6429ACIS-INONE60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500011

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. However, the exact precession period, if it exists, is not well known, but must be of the order of 10 yr. Alternatively, an unknown cause may have heated the atmosphere or changed the magnetic field configuration. In that case one may expect that at some point the source changes back to the situation before 2003.

R.A. Dec. Target Name Det. Grating Exp.Time
07:20:25.00-31:25:50.20RX J0720-3125HRC-SLETG35

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500021

Title: HFPK 334: A New Supernova Remnant in the Small Magellanic Cloud

PI Name: Peter Predehl

XMM-Newton observations of selected fields in the SMC revealed a new SNR outside of the major star forming regions where most other SNRs are found. Radio data confirm the SNR nature of the object and the 20 cm radio image reveals an extent of about one arcmin in diameter. Most of the radio emission originates from at least 5 blobs which are about 10 arcsec in diameter. A comparison of the X-ray and radio images indicates that a similar morphology might also be present in the X-ray image, with softer emission originating from the outer radio lobes. The morphology of HFPK 334 might suggest that there is a central source associated with the SNR shell. We propose a Chandra observation to resolve the X-ray emission from the SNR to investigate the possible presence of a pulsar wind nebula.

R.A. Dec. Target Name Det. Grating Exp.Time
01:03:28.00-72:47:30.00HFPK 334ACIS-SNONE28.5

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500027

Title: X-ray emission from the old pulsar B1451-68

PI Name: Gordon Garmire

X-ray observations of old radio pulsars are needed for studying their evolution and the mechanisms of their magnetospheric and thermal emission. To expand the current small sample of old pulsars observed in X-rays, we propose an ACIS-S observation of the 42 Myr old pulsar B1451-68.

R.A. Dec. Target Name Det. Grating Exp.Time
14:56:00.20-68:43:39.00PSR B1451-68ACIS-SNONE35

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500032

Title: SNR RCW 103: Ejecta, Blast Wave, and the Central Compact Object

PI Name: Gordon Garmire

Supernova Remnant (SNR) RCW 103 is a young Type II SNR showing bright X-ray shell and the peculiar central compact object (CCO). While the bright X-ray shell appears to be the shocked stellar winds produced by the massive progenitor, other characteristic features for a young Type II SNR such as metal-rich ejecta and the outer blast wave have not been detected. We propose an 80 ks ACIS observation to search for these features. We will also perform spectral and temporal study of the CCO.

R.A. Dec. Target Name Det. Grating Exp.Time
16:17:37.60-51:01:13.00RCW 103ACIS-INONE80

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500036

Title: Completing the Timing of Two Isolated Neutron Stars

PI Name: Steve Murray

The nearest thermally emitting neutron stars offer some of the clearest clues to the true demography of neutron stars, and arguably the best prospects for measuring neutron-star radii. For both tasks, knowledge of their magnetic field strengths is essential, and hence we have been determining timing solutions with Chandra and XMM. The results show a surprisingly tight grouping of magnetic field strengths in a range intermediate between normal pulsars and magnetars, with a hint at an interaction between the thermal emission and magnetic field. For the two sources observed most recently, however, our analysis is limited by the time-span and gaps in the data. We request one short observations of each of those two sources to achieve much more accurate timing solutions.

R.A. Dec. Target Name Det. Grating Exp.Time
21:43:03.30+06:54:17.00RX J2143.0+0654ACIS-SNONE12
08:06:23.40-41:22:30.90RX J0806.4-4123ACIS-SNONE18

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500041

Title: Imaging Supernova Remnant 1987A at the Highest Resolution

PI Name: Steve Murray

HRC observations of SN 1987A have revealed the detailed morphology of the remnant, allowing robust measurements of the size and other geometric parameters. We propose a second epoch HRC observation which will indicate the source evolution. The results will be combined with ACIS and radio data to serve as inputs to our hydrodynamic simulations, with the aim to determine the structure of the underlying circumstellar material. We note that the proposed HRC observation will complement rather than conflict with any ACIS observations of SN 1987A, since ACIS data carry spectral information, while HRC data have superior spatial resolution.

R.A. Dec. Target Name Det. Grating Exp.Time
05:35:28.00-69:16:11.20SN 1987AHRC-INONE35

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500043

Title: Search for 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 time at which this break in the light curve 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
GRB AO11-01ACIS-SNONE60
GRB AO11-02ACIS-SNONE60
GRB AO11-03ACIS-SNONE60
GRB AO11-04ACIS-SNONE60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500043

Title: Search for 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 time at which this break in the light curve 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
GRB AO11-01ACIS-SNONE60
GRB AO11-02ACIS-SNONE60
GRB AO11-03ACIS-SNONE60
GRB AO11-04ACIS-SNONE60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500044

Title: Snap-shot survey of unidentified galactic GeV sources

PI Name: Gordon Garmire

We will observe unidentified GeV sources in the Galactic plane recently discovered by Fremi/LAT. Most of the galactic GeV sources are likely to be associated with pulsars and SNRs. High-resolution X-ray observations provide an efficient way to identify the nature of GeV sources and obtain a much more complete census of galactic neutron stars.

R.A. Dec. Target Name Det. Grating Exp.Time
10:18:15.00-58:58:41.000FGL J1018.2-5858ACIS-INONE10
18:44:23.00-03:30:29.000FGL J1844.1-0335ACIS-INONE10
14:30:35.00-59:20:18.900FGL J1430.5-5918ACIS-INONE10
14:13:10.00-62:03:47.000FGL J1413.1-6203ACIS-INONE10
18:21:28.00-14:44:24.000FGL J1821.4-1444ACIS-INONE10
16:48:07.00-46:06:43.000FGL J1648.1-4606ACIS-INONE10
17:41:25.00-30:46:23.000FGL J1741.4-3046ACIS-INONE10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500065

Title: The First X-Ray Expansion Measurements of the Cygnus Loop

PI Name: SATORU KATSUDA

We propose to perform a second-epoch observation of the northeastern limb of the Cygnus Loop supernova remnant to measure its expansion. The edges of the X-ray emission are associated with Balmer-dominated filaments whose proper motions were recently measured to be 0".09/yr. Assuming that the proper motion of the Balmer-dominated filament is equal to that of the edge of the X-ray--emitting plasma, we expect to see a shift of 0".72 between the first- and the second-epoch Chandra observations. We can directly compare proper motions between optical and X-rays, for the first time. The comparison will provide key information on the origin of the X-ray--emitting plasma in the Cygnus Loop. We request one pointing observation with an exposure time of 40ksec.

R.A. Dec. Target Name Det. Grating Exp.Time
20:54:38.80+32:16:27.90Cygnus Loop NE Rim re-visitedACIS-SNONE40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500068

Title: CHANDRA CYCLE 11 SPATIAL AND SPECTRAL MONITORING OF SNR1987A

PI Name: David Burrows

Regular monitoring of SNR1987A, 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. SNR1987A 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 SNR1987A in Cycle 11 at roughly six month intervals.

R.A. Dec. Target Name Det. Grating Exp.Time
05:35:28.00-69:16:11.10SNR 1987AACIS-SHETG64
05:35:28.00-69:16:11.10SNR 1987AACIS-SHETG59

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500078

Title: Probing the Central Engine of the Plerionic SNR CTB 87

PI Name: Samar Safi-Harb

Pulsar wind nebulae (or plerions) are an ideal laboratory to study the physics of neutron stars and particle acceleration; and Chandra is the ideal satellite to probe their powering engines and image their X-ray emission with an unprecedented resolution. Among the plerionic SNRs, nearly a dozen have properties that differ from the Crab nebula, and are therefore dubbed as plerions of the second kind'. We propose to explore CTB 87, the least studied member of this class in X-rays, in order to study the putative pulsar and perform a high-resolution imaging and spectroscopic study of the plerion, including the search for structures associated with the deposition of the neutron star's energy into its surroundings.

R.A. Dec. Target Name Det. Grating Exp.Time
20:16:09.10+37:11:10.20CTB 87ACIS-INONE70

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500201

Title: A Direct X-Ray Expansion Measurement of the SMC SNR 1E 0102.2--7219

PI Name: Robert Petre

We propose to make the first direct X-ray proper motion measurement of an extragalactic SNR, 1E~0102.2-7219 in the SMC. Its proper motion was indirectly measured in 2000 using a combination of Einstein, ROSAT, and Chandra data to be 0.1 \%/yr. The corresponding fast shock velocity implies a higher postshock proton temperature than can be consistent with the spectrally measured electron temperature behind the forward shock unless a significant fraction of the shock energy is diverted from heating the gas, most likely to particle acceleration. A direct measurement of the shock velocity using Chandra will confirm this important result. Duplicating an early 20 ks HRC observation provides a 10 year baseline, allowing four independent proper motion measurements around the forward shock.

R.A. Dec. Target Name Det. Grating Exp.Time
01:04:02.40-72:01:55.301E 0102.2-7219HRC-INONE20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500222

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+00:29:27.20PSR J1832+0029ACIS-SNONE20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500272

Title: A Detailed Study of the Aged O-Rich Supernova Remnant 0049-73.6

PI Name: SANGWOOK PARK

O-rich supernova remnants (SNRs) provide an excellent opportunity for the study of core-collapse (CC) nucleosynthesis and the late-stage evolution of a massive star. While young O-rich SNRs (e.g., Cas A and G292.0+1.8) are being extensively studied, such studies are intrinsically limited because the early-stage of the blast wave and reverse shock may not reveal the full nature of metal-rich ejecta and the surroundings. Studies of relatively old O-rich SNRs are essential for a comprehensive understanding of CC SNRs, complementing those of young SNRs. The old O-rich SNR 0049-73.6 is a perfect example for such a study, revealing both high- and low-Z ejecta and well-evolved blast wave. Thus, we propose a deep 450 ks ACIS observation of 0049-73.6 for a detailed X-ray imaging spectroscopy.

R.A. Dec. Target Name Det. Grating Exp.Time
00:51:07.00-73:21:30.00SNR 0049-73.6ACIS-SNONE450

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500276

Title: A Detailed Study of the Type Ia Supernova Remnant G299.2-2.9

PI Name: SANGWOOK PARK

Supernova remnant (SNR) G299.2-2.9 is a unique example of the Type Ia SNR which allows us a detailed 2-D spectral study for both of the metal-rich ejecta and ambient structures. Such studies of the ejecta and ambient medium are essential to reveal the detailed SNe Ia explosion mechanisms and their specific environments, which would critically impact their utility in cosmology. The proposed studies of both of the Type Ia SN ejecta and ambient structures cannot be performed with young historical Type Ia SNRs, and the mid-aged Type Ia SNR G299.2-2.9 provides a unique opportunity. Thus, we propose a 640 ks Chandra observation of G299.2-2.9. The proposed observation will serve a legacy which will be an essential basis for a high resolution spectroscopy of Type Ia SNRs with IXO and Astro-H.

R.A. Dec. Target Name Det. Grating Exp.Time
12:14:50.00-65:28:25.00G299.2-2.9ACIS-INONE640

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500355

Title: Unveiling the nature of cyclic behavior in the period evolution of the Anomalous X ray Pulsar XTE j1810-197

PI Name: Federico Bernardini

This program is aimed at obtaining a phase coherent time solution for the period evolution of XTEJ1810-197 (XTE),and concluding the successful X-ray monitoring of this unique Anomalous X-ray Pulsar (AXP),the first identified transient AXP,a neutron star (NS) whose emission is due to the decay of an extremely high magnetic field (10e15 G).Its transient behavior,outburst flux increase ~100,allowed us to monitor its time properties for 6 years.The source was found to be a bright and highly polarized transient radio pulsar.Important new informations on AXP have been gathered from simultaneous X-ray and radio band observations.The pointings we request are aimed at checking for the presence of precession of its rotation axis.XTE could be the unique precessing AXP(there are only 3 precessing NS)

R.A. Dec. Target Name Det. Grating Exp.Time
18:09:51.10-19:43:51.90XTE J1810-197ACIS-SNONE25
18:09:51.10-19:43:51.90XTE J1810-197ACIS-SNONE25

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500373

Title: THE X-RAY EVOLUTION OF SUPERNOVA 2004AM

PI Name: Yi-Kuan Chiang

Recently, we found a new candidate of an X-ray supernova (XSN), SN 2004am, that shows rising X-ray flux for several years after explosion. There are only two SNe, SN 1996cr and SN 1987A, which have similar long-term X-ray light curve. If SN 2004am is similar to the other two Type II SNe, the supergiant progenitor likely explodes into a wind-blown bubble resulting a unique X-ray light curve. Further regular monitoring observations of SN 2004am will allow us to constrain the light curve slope and luminosity. By comparing these with SN 1996cr and SN 1987A, we might be able to gain valuable information about the circumstellar matter density structure. Hence, confirming the XSN nature of SN 2004am will add an important sample in studying late-time behaviors of Type II SNe.

R.A. Dec. Target Name Det. Grating Exp.Time
09:55:46.60+69:40:38.10SN 2004amACIS-SNONE10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500374

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
Short-GRB-1ACIS-SNONE20
Short-grb-2ACIS-SNONE20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500395

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 six known sources, SGR 1900+14, SGR 1806-20, SGR 1550-5418, SGR 0501+4516, SGR 1627-41, SGR 0526-66, the SGR candidate SGR 1801-23, as well as any newly discovered SGR source.

R.A. Dec. Target Name Det. Grating Exp.Time
19:07:14.30+09:19:20.10SGR 1900+14ACIS-SNONE40
18:08:39.30-20:24:39.50SGR 1806-20ACIS-SNONE40
16:35:51.80-47:35:23.30SGR 1627-41ACIS-SNONE40
05:26:01.10-66:04:38.00SGR 0526-66ACIS-SNONE40
05:01:06.80+45:16:33.90SGR 0501+4516ACIS-SNONE40
15:50:54.10-54:18:23.80SGR 1547-5408ACIS-SNONE40
18:00:58.90-22:56:48.50SGR 1801-23ACIS-SNONE40
NEW SGRACIS-SNONE40
19:07:14.30+09:19:20.10SGR 1900+14ACIS-SNONE25
18:08:39.30-20:24:39.50SGR 1806-20ACIS-SNONE25
16:35:51.80-47:35:23.30SGR 1627-41ACIS-SNONE25
05:26:01.10-66:04:38.00SGR 0526-66ACIS-SNONE25
05:01:06.80+45:16:33.90SGR 0501+4516ACIS-SNONE25
15:50:54.10-54:18:23.80SGR 1547-5408ACIS-SNONE25
18:00:58.90-22:56:48.50SGR 1801-23HRC-INONE15

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500430

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
Type IIn SNACIS-SNONE40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500452

Title: A Search for X-Rays From Pulsars Discovered by Fermi

PI Name: Mallory Roberts

The Fermi LAT has discovered 14 gamma-ray pulsars that had not been previously detected as pulsars at other wavelengths. Many of these have relatively low spin down energies, suggesting they are nearby. Here we request Chandra ACIS imaging observations of three of these pulsars in order to search for X-ray counterparts in order to obtain accurate positions for timing and follow-up optical studies, search for extended emission from a compact pulsar wind nebulae, and make preliminary spectral and flux measurements.

R.A. Dec. Target Name Det. Grating Exp.Time
06:33:44.00+06:32:24.80PSR J0633+06ACIS-SNONE20
19:07:51.70+06:01:19.20PSR J1907+06ACIS-SNONE20
17:32:50.80-31:35:17.90PSR J1732-31ACIS-SNONE20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500474

Title: The Energetics and Environments of 'Naked' Supernovae

PI Name: Alicia Soderberg

Twenty years have passed since the peculiar class of Type Ibc supernovae 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 questions 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 GRBs by a factor of 100. Here we propose a focused program that leverages CXO data with those from Swift/XRT and the Very Large Array.

R.A. Dec. Target Name Det. Grating Exp.Time
SNIbc1ACIS-SNONE10
SNIbc2ACIS-SNONE10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500485

Title: Target-of-Opportunity Chandra Observations of Glitching High-B Radio Pulsars: Searching for Magnetar Metamorphoses

PI Name: Victoria Kaspi

We recently discovered a high-magnetic-field rotation-powered pulsar undergoing a "magnetar metamorphosis" simultaneously with a rotation glitch, transforming from an ordinary rotation-powered pulsar into a much brighter X-ray source with very different spectrum, and even possibly impacting on its nebular surroundings. After <8 weeks, the source returned to its normal state. This amazing event, caught serendipitously, suggests that all high-magnetic-field radio pulsars undergo such transient metamorphoses at glitch epochs, but have not been so recognized because of the absence of a sensitive all-sky monitor. We therefore request Chandra ToO observations of one high-magnetic-field radio pulsar when it has a large glitch in order to test this hypothesis.

R.A. Dec. Target Name Det. Grating Exp.Time
01:57:49.90+62:12:25.90PSR B0154+61ACIS-SNONE105
07:26:08.10-26:12:38.10PSR J0726-2612ACIS-SNONE105
08:47:57.00-43:16:57.20PSR J0847-4316ACIS-SNONE105
10:01:32.20-59:39:17.80PSR J1001-5939ACIS-SNONE105
11:19:14.30-61:27:49.50PSR J1119-6127ACIS-SNONE105
16:32:39.70-48:18:52.60PSR J1632-4818ACIS-SNONE105
17:18:10.00-37:18:53.00PSR J1718-3718ACIS-SNONE105
17:26:07.50-35:29:58.00PSR J1726-3530ACIS-SNONE105
17:34:26.60-33:33:22.00PSR J1734-3333ACIS-SNONE105
18:14:43.10-17:44:48.00PSR J1814-1744ACIS-SNONE105
18:19:33.80-14:58:01.00PSR J1819-1458ACIS-SNONE105
18:21:34.30-14:19:26.00PSR 1821-1419ACIS-SNONE105
18:47:35.20-01:30:46.00PSR J1847-0130ACIS-SNONE105
19:13:50.80+04:46:06.00PSR J1913+0446ACIS-SNONE105
19:18:23.60+14:45:06.00PSR B1916+14ACIS-SNONE105
New High-B pulsarACIS-SNONE105

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500488

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 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
low-z GRBACIS-SNONE45

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500493

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 A11, 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
10:50:08.90-59:53:20.401E 1048.1-5937ACIS-SNONE90
23:01:07.90+58:52:46.001E 2259+586ACIS-SNONE90
17:08:47.20-40:08:50.70RXS 1708-4009ACIS-SNONE90
01:46:22.30+61:45:07.004U 0142+61ACIS-SNONE90
18:41:19.20-04:56:12.501E 1841-045ACIS-SNONE90
18:44:53.00-02:56:40.00AX J1845-0258ACIS-SNONE90
01:00:43.10-72:11:33.80CXOU J0110043.1-721134ACIS-SNONE90
18:09:51.10-19:43:51.70XTE J1810-197ACIS-SNONE90
16:47:10.20-45:52:17.00CXOU J164710.2-455216ACIS-SNONE90
New AXPACIS-SNONE90
15:50:55.30-54:19:02.001E 1547.0-5408ACIS-SNONE90
18:46:24.50-02:58:28.00J1846-0258ACIS-SNONE90

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500524

Title: Catching up to the Hydrogen Envelope: Late-time X-ray Observations of Type Ib/c SNe

PI Name: David Pooley

We propose Chandra observations of five Type Ib/c supernovae (SNe) which show signs of strong, late-time circumstellar (CSM) interaction, a fascinating new phenomenon discovered by our team. Exploring this transition from modest CSM interaction typical of Type Ib/c SNe to strong CSM interaction typical of Type IIn SNe will allow us to probe the transition of the progenitor star from its pre-Wolf-Rayet phase into the Wolf-Rayet phase and learn details about how its hydrogen envelope was shed. This is a new and unique opportunity, and Chandra observations are the best way of pursuing it.

R.A. Dec. Target Name Det. Grating Exp.Time
16:21:48.90-02:16:17.30SN 2004dkACIS-SNONE8
21:42:23.70+12:29:50.90SN 2001emACIS-SNONE10
06:16:16.20-21:22:09.80SN 1999ecACIS-SNONE13
14:22:22.70-00:23:24.30SN 1996aqACIS-SNONE7
23:04:54.90+12:18:20.10SN 1990UACIS-SNONE25

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500537

Title: Chandra Observation of a Gamma-ray Emitting SNR, W44

PI Name: Takaaki Tanaka

We propose to study a mixed-morphology SNR W44, where a gamma-ray source was detected in a close vicinity by EGRET. Recent observations by Fermi have revealed that position and morphology of the gamma-ray source is similar to those of radio and IR, suggesting that the gamma-rays are of hadronic origin and originate in shocked molecular clouds. We propose here to observe the northern part of the SNR, from which Fermi detected strong gamma-ray emission. This is the first on-axis observation of this region by Chandra, which enables us to study the X-ray morphology of the gamma-ray emitting region with the superb angular resolution. Our aim is to detect non-thermal emission (presumably proton or electron bremsstrahlung) and to constrain the emission model for the gamma-ray emission.

R.A. Dec. Target Name Det. Grating Exp.Time
18:55:34.10+01:33:04.00W44 NorthACIS-INONE60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500541

Title: Investigating the nature of the candidate SNR G29.37+0.10

PI Name: Regis Terrier

The new supernova remnant (SNR) candidate G29.37+0.10 is a very peculiar object: a bright jet or filament-like structure lying at the centre of a faint radio shell. The nature of the jet structure is unclear. Originally interpreted as a radio Galaxy, the association with a shell SNR is also suggesting a pulsar wind nebula (PWN) or microquasar system. Two X-ray point sources and a hint of diffuse emission are detected on the edge of the northeastern radio lobe in archival data, one of them being variable. Recently HESS has discovered a large complex of TeV emission, HESS J1843-033, the north eastern wing of which is coincident with G29.37+0.10. We propose a deep Chandra observation to determine the origin of the high energy particles and the actual nature of this unusual SNR candidate.

R.A. Dec. Target Name Det. Grating Exp.Time
18:44:42.50-03:05:36.00G29.37+0.10ACIS-INONE60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500573

Title: Two Magnetar Candidates in HESS Supernova Remnants

PI Name: Eric Gotthelf

We have identified two new candidate magnetars in HESS detected shell-type SNRs. The X-ray point sources have AXP-like spectra, and periods in the magnetar range. We propose a second timing observation of each object in order to infer its magnetic field strength and spin-down power. This will potentially double the number of magnetar/SNR associations in the Galaxy, and address whether an early evolutionary stage of a magnetar can contribute to diffuse TeV emission, a heretofore unknown channel.

R.A. Dec. Target Name Det. Grating Exp.Time
17:14:05.70-38:10:30.90CXOU J171405.7-381033ACIS-SNONE30
17:32:03.30-34:45:17.70XMM J173203.3-344518ACIS-SNONE40

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500575

Title: Search for the X-Ray counterpart to LAT PSR J2021+4026

PI Name: Martin Weisskopf

We propose a Chandra ACIS-S imaging observation of the pulsating gamma-ray source LAT PSR J2021+4026. This is the 5th brightest source in the gamma-ray sky and the brightest source lacking a counterpart at all other wavelengths from radio to X-rays. The full Fermi/LAT 99-percent error circle will be imaged on S3. This gives the optimum throughput and highest sensitivity for the expected soft thermal spectrum plus power-law. Extensive followup optical and radio observations will be performed independently.

R.A. Dec. Target Name Det. Grating Exp.Time
20:21:31.00+40:26:46.00FERMI-LAT PSR J2021+4026ACIS-SNONE60

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500674

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
SN 2ACIS-SNONE10
SN 3ACIS-SNONE10
SN 4ACIS-SNONE10

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500703

Title: A DEEP CHANDRA/NOAO INVESTIGATION TO IDENTIFY THE COUNTERPART OF AN OLD PULSAR DISCOVERED IN GAMMA-RAYS

PI Name: Andrea De Luca

After 5 months of all-sky scanning, the Fermi Large Area Telescope (LAT) has discovered 15 new gamma-ray pulsars using a blind search algorithm. The discovery of a population of radio-quiet (or at least radio-faint), bright gamma-ray pulsars has deep implications for gamma-ray source population studies, as well as for our overall understanding of pulsar physics. We propose a multiwavelength project within the frame of Chandra/NOAO joint observations, aimed at identifying the X-ray counterpart of one of the most exciting members of the newly discovered pulsar sample: a bright gamma-ray pulsar with timing properties pointing to an old neutron star with a very low rotational energy loss. Possibly very close to us, such pulsar is a factor 10 less energetic and significantly older than Geminga

R.A. Dec. Target Name Det. Grating Exp.Time
03:57:50.50+32:05:26.20LAT PSR J0357+32ACIS-SNONE80

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500712

Title: The Proper Motion of the Central Compact Object in Cassiopeia A

PI Name: Tracey Delaney

We propose to measure the proper motion of the central compact object (CCO) in Cassiopeia A over a 10-year baseline. The CCO is an enigma that does not fit cleanly into any compact object category. It is offset from the optical expansion center of the supernova remnant which suggests a proper motion of 350 km/s in a direction perpendicular to the well-known northeast-southwest jet axis. However, the actual proper motion is NOT KNOWN and may not be tied to the offset direction at all. The true direction and magnitude of the CCO's proper motion can be used to provide constraints on its nature and the dynamics of core-collapse supernovae.

R.A. Dec. Target Name Det. Grating Exp.Time
23:23:25.80+58:48:53.40Cassiopeia AHRC-INONE50

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500714

Title: The Proper Motion of SNR E0519-69.0

PI Name: John Hughes

We propose to measure independently the proper motion expansions of the ejecta and forward shock in SNR E0519-69.0. The metal-enriched reverse-shock-heated ejecta emits only in X-rays, while the forward shock is traced to high precision by H alpha emission. The proposed measurements require the unique high resolution imaging capabilities of Chandra and Hubble. The optical (forward shock) and X-ray (ejecta) results will yield important constraints on the remnant's evolutionary state; we will search in particular for evidence of cosmic-ray modified dynamics. An important component of this project is an integrated theoretical investigation using realistic models of SN Ia explosions evolved to the remnant stage.

R.A. Dec. Target Name Det. Grating Exp.Time
05:19:35.00-69:02:10.00SNR E0519-69.0ACIS-SNONE52

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500744

Title: Nailing Down the Broadband Properties of a Short GRB with the help of Chandra

PI Name: Nathaniel Butler

Understanding of the origin and nature of short/hard Gamma-ray bursts (SHBs) is one of the last frontiers of GRB research. We propose a 3 epoch ToO observations of one SHB, as part of a broadband followup campaign. We hope to decisively answer the following questions: Do the afterglows of SHBs arise from external shocks? What are the explosion energy, external density, and micro-physical parameters? In what environments do SHBs occur, galaxy clusters? Are the afterglows isotropic, and what is the SHB rate? What drives the X-ray flaring, which apparently occurs many dynamical timescales after a putative compact object merger?

R.A. Dec. Target Name Det. Grating Exp.Time
Short /hard GRBACIS-SNONE50

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500770

Title: Chandra Monitoring of the Rotation-Powered Pulsar/Magnetar Transition Object PSR J1846-0258

PI Name: Fotis Gavriil

The young pulsar PSR J1846-0258 was long thought to be exclusively rotation-powered. Our discovery of magnetar-like emission from this source makes it the only known example of a rotation-powered pulsar/magnetar transition object. Following its outburst, our Rossi X-ray Timing Explorer (RXTE) observations revealed that the pulsar's pulsed flux returned to its quiescent value. However, with our background dominated RXTE observations we cannot determine whether the spectrum and total flux, and hence pulsed fraction, have as well. PSR J1846-0258 is the only source that exhibits both magnetar-like emission and a bright and variable pulsar wind nebula (PWN). The requested observations will help constrain the nature of the interesting variability observed in this PWN.

R.A. Dec. Target Name Det. Grating Exp.Time
18:46:24.90-02:58:30.10PSR J1846-0258ACIS-SNONE52

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500788

Title: Crab Giant Pulses: A Correlation Study at Radio and X-rays

PI Name: Maura McLaughlin

We request an 20-ks observation of the Crab pulsar with the Chandra HRC-S to correlate radio giant pulses with X-ray photons. The goal of our experiment is to obtain the best constraints ever on the giant pulse emission mechanism. We will accumulate about 20,000 radio giant pulses with simultaneous Chandra data, making this the first such correlation study at these energies to date. This work is important for constraining the giant-pulse emission mechanism and for testing the first quantitative model for radio giant pulses. It will also help us to understand the elusive pulsar emission mechanism in general and probe the exotic physics of relativistic particle acceleration in high magnetic fields.

R.A. Dec. Target Name Det. Grating Exp.Time
05:34:32.00+22:00:52.10PSR B0531+21HRC-SLETG20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500799

Title: Constraining GRB phycis through their afterglow light curves

PI Name: Evert Rol

Our current understanding of gamma-ray burst afterglow light curves has become increasingly confused, and the validity of the standard synchrotron fireball model for GRBs is nowadays increasingly questioned. In particular, achromatic breaks due to the the lateral expansion of the GRB jet are not substantiated by Swift X-ray observations. It is only through this that the true energies of GRBs are constrained, and questions such as the true rate of GRBs and the determination of cosmological parameters are based upon it. We propose to use CXO to construct the late time X-ray light curves for several Swift bursts. These observations will search for evidence of achromatic jet breaks, providing the necessary insight into the GRB evolution, and the energy and activity of the central engine.

R.A. Dec. Target Name Det. Grating Exp.Time
GRBACIS-SNONE21

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500803

Title: Testing Shock Physics Through Flux Variability in Cas A

PI Name: Daniel Patnaude

Cassiopeia A has recently joined SN 1987A and RXJ 1713-3946 as one of only a handful of SNRs to exhibit temporal variations in their thermal and nonthermal emission. We propose for three 50 ks observations of Cas A spaced in 6 month intervals. These new observations are designed to test for emission variability on short timescales. Consequently, they will discriminate between several models for rapid variability in the emission from nonthermal filaments. Furthermore, with these new observations, we will identify freshly reverse-shock heated ejecta, thus allowing us to measure the dynamics and chemical composition of the most pristine supernova debris.

R.A. Dec. Target Name Det. Grating Exp.Time
23:23:26.70+58:49:03.00Cassiopeia AACIS-SNONE100

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500804

Title: Confirming and exploring the supernova remnant candidate G308.3-1.4

PI Name: Chung Yue Hui

ROSAT all-sky survey (RASS) data have provided another window to search for supernova remnants (SNRs). Utilizing this database, the first catalogue of extended X-ray sources as promising SNR candidates was published ten years ago. However, these targets have not yet been fully explored by the state-of-art X-ray observatories. We have reexamined this catalogue and chosen the brightest SNR candidate, G308.3-1.4, for a detailed spectro-imaging X-ray study with Chandra. We propose a short ACIS-I imaging observation to have a full coverage of G308.3-1.4 in order to investigate its spectrum and morphology in details as well as to search for the associated compact stellar remnants produced in the supernova explosion.

R.A. Dec. Target Name Det. Grating Exp.Time
13:40:54.50-63:43:06.00G308.3-1.4ACIS-INONE15

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500846

Title: Tracking the X-ray Evolution of the Enigmatic SN1996cr

PI Name: Franz Bauer

SN1996cr is one of the five closest SNe to explode in the past 3 decades, yet lay hidden for many years. Its unique temporal evolution suggests that it exploded into a compact wind-blown bubble or shell, similar to SN1987A but >1000x more luminous. Recent observations now show a 20% decline, implying that the shock may have finally overtaken the shell. The nature of this new decline has important implications for the CSM created during the last 100-10,000 yrs by the progenitor, an epoch traditionally difficult to probe in massive stars. Along with ongoing ATCA and VLBA radio monitoring, an accurate well-sampled X-ray light curve is vital for setting strong constraints on the structure of the nebula established by progenitor winds and, by extension, the evolution of the progenitor itself.

R.A. Dec. Target Name Det. Grating Exp.Time
14:13:10.00-65:20:44.50SN1996crACIS-SNONE20

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500865

Title: The long tail of PSR J1740+1000

PI Name: Oleg Kargalstev

An XMM-Newton observation of a 100-kyr-old PSR J1740+1000 revealed a 2-pc long linear feature, most likely a tail behind the supersonically moving pulsar. X-ray observations of such structures are particularly interesting because the entire pulsar wind flow is channeled into a narrow tail,thus making it possible to detect the shocked wind at large distances from the pulsar. Therefore, spatially-resolved spectroscopy and high-resolution imaging of pulsar tails are extremely useful for studying the evolution of cooling pulsar winds and the properties of relativistic MHD flows. Along the entire 5' length, the tail of PSR J1740+1000 is extremely well collimated, with the width of <40'', making Chandra ACIS the only instrument capable of studying the structure of the tail.

R.A. Dec. Target Name Det. Grating Exp.Time
17:40:24.30+09:59:22.40PSR J1740+1000ACIS-INONE70

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 11500877

Title: Constraining the Distance & Temperature of LAT PSR J1742-20, The Newly Discovered Nearby Middle-Aged Neutron Star

PI Name: Gregory Sivakoff

The recent launch of Fermi has resulted in the discovery, in a blind search, of at least 14 previously unknown pulsars. One of these, LAT PSR J1742-20, has recently been identified as a radio pulsar. It has an estimated distance of 400 pc and characteristic age of 0.4 Myr making LAT PSR J1742-20 one of only three identified middle aged pulsars within 1 kpc. We have identified a SWIFT source as the likely X-ray counterpart. X-ray emission of middle aged pulsars is often dominated by its thermal component, which can be studied to constrain properties of the neutron star. We propose a 50ks ACIS-S observation of J1742-20 to provide the first accurate measurements of its thermal temperature and distance, and search for a potential pulsar wind nebula.

R.A. Dec. Target Name Det. Grating Exp.Time
17:41:57.80-20:54:11.90LAT PSR J1742-20ACIS-SNONE50

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 11610210

Title: Mapping out the hot gas outflow from the M31 bulge

PI Name: Q. Daniel Wang

The hot gas outflow from the galactic bulge of M31 was discovered recently, which is driven primarily by Type Ia SNe. To quantify the morphological, thermal, and dynamical properties of this outflow along the minor axis of the galaxy, we propose four ACIS observations to obtain X-ray data with substantially improved spatial resolution, sensitivity, and field coverage. We will map out the overall X-ray morphology and substructure of the outflow, characterize its spectral properties, and distinguish X-ray emission and/or absorption features caused by spiral arms. The results will test our understanding of the galactic bulge energy and mass feedback and will provide badly-needed insights into similar phenomena observed in the Milky Way and other galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
00:43:25.60+41:08:21.40M31 bulge off-field 1ACIS-INONE60
00:44:03.10+41:01:15.90M31 bulge off-field 2ACIS-INONE20

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 11610278

Title: X-raying Circumnuclear Star Formation and Feedback in Nearby Normal Galaxies

PI Name: Douglas Swartz

We propose an ACIS-S imaging observation of the barred late-type spiral galaxy NGC 2903. Our primary scientific objective is to investigate the star-forming circumnuclear ring and related structures. We will investigate the effects of star formation on the distribution of gas in this ring and on accretion onto any central massive object. We will construct maps of the distribution of hot gas and compare these to the cold gas, warm gas, and stellar morphologies. We will determine whether the hot gas is confined to the disk or is being expelled in galactic outflows, determine the physical properties of the gas (and point sources), and estimate the role of star formation and associated feedback in impeding or enhancing gas accretion onto any central object.

R.A. Dec. Target Name Det. Grating Exp.Time
09:32:10.10+21:30:03.00NGC 2903ACIS-SNONE95

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 11610479

Title: Seyfert's Sextet: an evolved Stephan's Quintet

PI Name: Ginevra Trinchieri

In the context of galaxy structure evolution, groups are expected to become more X-ray luminous as they grow older. Seyfert's Sextet is a spectacular example of a compact group unambiguously in an advanced stage of coalescence, and as such is expected to be X-ray luminous. Although it shares many characteristics with Stephan's Quintet, it is more evolved, has twice as much light in a diffuse halo, yet its X-ray luminosity is significantly smaller. We aim at studying its X-ray properties to better understand its place in a compact group evolutionary scheme. The biggest mystery involves the low gas fraction. Is there an extended low surface brightness X-ray halo that earlier ROSAT observations could not see? How much gas has fallen into component nuclei generating AGN activity?

R.A. Dec. Target Name Det. Grating Exp.Time
15:59:11.90+20:45:31.00HCG 79ACIS-SNONE70

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 11610596

Title: Snapshots of Isolated Elliptical Galaxies

PI Name: DAVID BUOTE

The properties of dark matter halos on galactic scales remain a largely untapped resource for cosmological studies. X-ray observations offer potentially the most promising means to study dark matter in isolated elliptical galaxies, but there is presently a lack of known suitable candidates for study. Therefore, we propose a snapshot survey of 12 systems to identify isolated elliptical galaxies with X-ray properties similar to the best examples currently known. Deep follow-up exposures with XMM and Chandra of promising targets will then be sought for detailed analysis of their dark matter distributions.

R.A. Dec. Target Name Det. Grating Exp.Time
02:31:09.80+29:35:19.50NGC 953ACIS-SNONE7.5
03:01:30.40+37:45:57.60IC 278ACIS-SNONE7.5
02:50:59.70+37:27:59.90UGC 02328ACIS-SNONE7.5
20:56:56.60+06:49:03.70PGC 65766ACIS-SNONE7.5
09:56:47.90-65:37:33.30ESO092-001ACIS-SNONE7.5
01:11:35.90+49:07:16.30UGC 00746ACIS-SNONE7.5

Subject Category: NORMAL GALAXIES: DIFFUSE EMISSION

Proposal Number: 11610615

Title: Peering Into the Bondi Radius of the Supermassive Black Hole of NGC3115

PI Name: Jimmy Irwin

We propose a 125 ksec observation of the hot gas around the supermassive black hole at the center of the S0 galaxy NGC3115 to confirm that the size of the Bondi radius is large enough to be resolved by Chandra in future deeper observations. We also seek to confirm that the temperature of the gas rises within the Bondi radius, as predicted by radiative inefficient accretion models. If confirmed, NGC3115 will represent the *only* opportunity to perform a detailed test of inefficient accretion flow theory in the Chandra era and the foreseeable future, and deeper Chandra observations will be proposed to map rho(R) and T(R) for the first time within the Bondi radius of a black hole. This observation will also provide the deepest look of the X-ray binary population of an S0 galaxy to date.

R.A. Dec. Target Name Det. Grating Exp.Time
10:05:13.90-07:43:06.90NGC3115ACIS-SNONE125

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620024

Title: Black Hole X-ray Novae in M31

PI Name: Steve Murray

During A01-10 we found sufficient numbers of Black Hole X-ray Novae (BHXN) in M31 in order to estimate orbital periods for 10, and make the first comparison to the MW BHXN orbital period distribution. We propose to continue this Chandra/HST program, concentrating our scarce HST resources on a single transient which exceeds the NS Eddington limit. Only uninterrupted monitoring can yield the duty cycles and long-term lightcurves of BHXN (and other variables) in M31. Our GO+GTO programs have accumulated over 600ks (ACIS+HRC) near the M31 bulge. By continuing our monitoring program we will reach >750ks on the bulge and >1Msec total Chandra M31 exposure.

R.A. Dec. Target Name Det. Grating Exp.Time
00:42:44.40+41:16:08.30M31ACIS-INONE25

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620048

Title: Are the Observed Submm Flares Related to the X-ray/NIR Flares in Sgr A*?

PI Name: Gordon Garmire

We propose three 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
17:45:40.00-29:00:28.00Sgr A*ACIS-INONE39.9
17:45:40.00-29:00:28.00Sgr A*ACIS-INONE39.9

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620101

Title: Constraining the transient LMXB population

PI Name: Giuseppina Fabbiano

We propose a single 110 ks ACIS-S observation of the well-studied nearby elliptical galaxy NGC 4278, to constrain the transient LMXB population, which is of compelling interest for binary evolution models. We expect that this observation will more than triple the size of the transient sample, and will result in a five-fold increase, if followed by another observation in a few years time. This is a unique opportunity for verifying widely discussed theories on the nature and evolution of LMXB populations that cannot be addressed with Galactic data.

R.A. Dec. Target Name Det. Grating Exp.Time
12:20:06.80+29:16:50.70NGC 4278ACIS-SNONE110

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620107

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
11:51:33.30-02:22:22.00UM 461ACIS-SNONE38
09:56:46.00+28:49:33.80DDO 68ACIS-SNONE10

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620112

Title: The ringed galaxy NGC1291

PI Name: Giuseppina Fabbiano

We propose to observe the nearby ring galaxy NGC1291, with two ACIS-S exposures to cover the northern and southern sides of the UV-bright ring for a total of 120 ks. Together with the ~80 ks archival ACIS-S data these observations will give us the unique opportunity to observe and study in detail the X-ray binary (XRB) population of a galactic ring, which includes two ULXs.These observations will also provide the means to study the LMXB population of the bulge down to the limiting sensitivity of deep studies of LMXB elliptical populations, and establish if the 5 1037 erg s-1 break observed in these XLFsis a general feature of LMXB populations. Finally, we will be able to set a stringent constraint to the gaseous fuel available to the faint nuclear supermassive black hole.

R.A. Dec. Target Name Det. Grating Exp.Time
03:17:20.40-41:04:41.70NGC 1291ACIS-SNONE70
03:17:40.20-41:08:41.30NGC 1291ACIS-SNONE50

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620243

Title: A new look at the X-ray binary richest galaxy

PI Name: Thomas Maccarone

We propose a 40 ksec observation of NGC 4472, the optically brightest galaxy in the Virgo Cluster, which remains one of the few bright nearby galaxies which has been the subject of only a single observation of more than 10 ksec. Previous observations showed many sources in the range between 4E+38 and 1E+39 ergs/sec, while other galaxies have not. These objects represent the best candidates for being transient black hole X-ray binaries with outburst durations much shorter than the 9 years since the previous deep observations. If found to be persistent, they would suggest a large ultracompact black hole X-ray binary population. These data will also present the first deep look at the globular cluster black hole in NGC 4472 since the XMM data which demonstrated its existence.

R.A. Dec. Target Name Det. Grating Exp.Time
12:29:46.80+07:59:59.90NGC 4472ACIS-SNONE40

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620280

Title: Monitoring M31 for BHXNe

PI Name: Michael Garcia

During A01-9 we found ~25 Black Hole X-ray Novae (BHXNe) in M31 using Chandra, and with HST follow-up have estimated orbital periods for 9 of these. Observations are under way 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 over 800ks (ACIS+HRC) near the M31 bulge by the end of A10, and total Chandra exposure on M31 is now almost 1Msec. 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
00:42:44.40+41:16:08.30M31ACIS-INONE25

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620296

Title: Search for the Most Luminous ULXs in Collisional Ring Galaxies

PI Name: Saul Rappaport

We propose to observe nine prominent collisional ring galaxies in order to explore the upper end of the luminosity function of ultraluminous X-ray sources (ULXs''), i.e., with Lx > 10^{40} ergs/sec, and to investigate a possible cutoff at high luminosities. The significant numbers of ULXs in collisional ring galaxies, as well as their relatively simple geometry, make these galaxies good targets for such a study. The results may help determine the typical masses of the accretors in ULXs, and thereby bear on whether stellar mass black holes with M < 30 M_sun can radiate in a way that seems to violate the Eddington limit or, alternatively, on how intermediate mass black holes with masses of order 1000 M_sun can form and acquire massive companion stars.

R.A. Dec. Target Name Det. Grating Exp.Time
03:11:18.90+01:18:53.00Arp 147ACIS-SNONE45

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620601

Title: Ultra-Luminous x-Ray Sources in the Most Metal-Poor Galaxies

PI Name: Andrea Prestwich

There is growing observational and theoretical evidence to suggest that Ultra-Luminous X-ray sources (ULX) form preferentially in low metallicity environments. Here we propose a survey of 27 nearby (< 30Mpc) star-forming Extremely Metal Poor Galaxies (Z<5% solar). There are almost no X-ray observations of such low abundance galaxies (3 in the Chandra archive). These are the most metal-deficient galaxies known, and a logical place to find ULX if they favor metal-poor systems. We plan to test recent population synthesis models which predict that ULX should be very numerous in metal-poor galaxies. We will also test the hypothesis that ULX form in massive young star clusters, and ask for HST time to obtain the necessay imaging data.

R.A. Dec. Target Name Det. Grating Exp.Time
01:13:39.40+00:52:27.80UGC 772ACIS-SNONE5
21:04:55.30-00:35:22.00SDSS J210455.31-003522.2ACIS-SNONE5
11:32:02.50+57:22:45.70SBS 1129+576ACIS-SNONE15.03
08:25:55.50+35:32:32.00HS 0822+3542ACIS-SNONE5
11:05:53.70+60:22:28.70SBS 1102+606ACIS-SNONE10.261
12:01:22.30+02:11:08.30SDSS J120122.32+021108.5ACIS-SNONE8.072
11:19:34.40+51:30:12.10[RC2] A1116+51ACIS-SNONE10.901
09:44:16.60+54:11:34.30SBS 0940+544ACIS-SNONE16.93
10:16:24.50+37:54:46.00KUG 1013+381ACIS-SNONE9.411
12:30:48.50+12:02:42.10[RC2] A1228+12ACIS-SNONE12.124
14:17:01.40+43:30:05.50SBS 1415+437ACIS-SNONE5
04:05:20.40-36:49:00.706dF J0405204-364859ACIS-SNONE5
14:14:54.20-02:08:22.90SDSS J141454.13-020822.9ACIS-SNONE16.75
22:30:36.80-00:06:37.00SDSS J223036.79-000636.9ACIS-SNONE7.657
12:38:40.10+32:46:00.50UGCA 292ACIS-SNONE5
14:44:12.80+42:37:44.00HS 1442+4250ACIS-SNONE5
02:04:25.60-10:09:35.00KUG 0201-103ACIS-SNONE13.596
08:12:39.50+48:36:45.40SDSS J081239.52+483645.3ACIS-SNONE5
08:59:46.90+39:23:05.60SDSS J085946.92+392305.6ACIS-SNONE5
07:47:32.10+51:11:28.20KUG 0743+513ACIS-SNONE5
09:40:12.80+29:35:30.30KUG 0937+298ACIS-SNONE5
09:46:22.80+54:52:08.30KUG 0942+551ACIS-SNONE16.395

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620675

Title: The Deepest Stellar X-ray/optical Census of the Bulge

PI Name: William Clarkson

We have obtained the deepest optical dataset ever taken or planned towards the bulge, allowing bulge/disk decomposition down to F606W=23 and variability monitoring over seven days, diagnostics not available for any bulge field observed by Chandra. We propose ACIS-I imaging to identify X-ray point sources in this field. This will directly trace a number of fundamental yet poorly-constrained parameters of the inner Milky Way, for example the spin-down timescale of stars along the disk and bulge; the formation history of the bulge and, for the first time, direct constraints on the gravitational potential of the inner milky way through AGN-enabled absolute proper motions. Our proposed survey will be an essential calibrator for other X-ray/optical surveys of the bulge both past and planned.

R.A. Dec. Target Name Det. Grating Exp.Time
17:59:08.00-29:14:05.00SWEEPS_FIELDACIS-INONE100

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620883

Title: Studying binary evolution in the oldest open clusters: Collinder 261

PI Name: Maureen van den Berg

We propose to extend our study of close interacting binaries in old open clusters by obtaining the first X-ray observation (55 ks) of the rich cluster Collinder 261 (7 Gyr). Based on our previous work we expect to detect a variety of binaries: active binaries, cataclysmic variables, and also anomalous binaries that formed in dynamical encounters. The latter are key to constraining the complex interaction between binary evolution and open-cluster dynamics that models are now trying to understand; X-ray observations are an efficient way to discover these rare and otherwise difficult-to-find systems. Since their age and distance are accurately known, the X-ray sources in Collinder 261 will be important benchmarks for the study of binary evolution and coronal activity.

R.A. Dec. Target Name Det. Grating Exp.Time
12:37:59.00-68:22:40.00Collinder 261ACIS-INONE55

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620895

Title: Low Mass X-ray Binaries in Spiral Galaxies

PI Name: Arunav Kundu

We propose to study the low mass X-ray binary (LMXB) populations of a sample of 7 edge-on spiral galaxies and their connection with globular clusters (GCs). Chandra studies have established that roughly half of the LMXBs in elliptical galaxies are associated with GCs. This systematic study of 7 edge-on spirals will establish the corresponding rate in GCs. This analysis will allow us to test whether the small correlation between the scatter in L_LMXB/L_Opt and morphological type is due to differences in the properties of LMXBs in GCs or the field, and the implications of such observations. We will combine the requested Chandra observations of 3 spiral galaxies with archival analysis of another 4, and our extant large field of view optical study of the GC systems.

R.A. Dec. Target Name Det. Grating Exp.Time
00:03:14.90+16:08:44.00NGC 7814ACIS-SNONE60
12:11:04.40+50:29:05.00NGC 4157ACIS-SNONE60
08:52:41.30+33:25:19.00NGC 2683ACIS-SNONE40

Subject Category: NORMAL GALAXIES: X-RAY POPULATIONS

Proposal Number: 11620915

Title: Accretion onto nuclear black holes in early type galaxies: comparing field vs. clusters

PI Name: Elena Gallo

IF black holes are indeed ubiquitous in galactic nuclei, little is known about the frequency and intensity of their activity, the more so at the low-mass/low-luminosity end. Our cycle 8 observations of the Virgo clusters have delivered the most comprehensive measurement of the duty cycle, showing that although black holes are present even in low mass spheroids, activity is a strong function of mass. However, nuclear activity is also expected to be a strong function of environment, which regulates the gas supply through processes such as ram pressure stripping and merging. We propose the first systematic study of the effects of the environment on low level accretion, by combining our Virgo study with new observations and archival data of a volume limited sample of 100 field spheroids.

R.A. Dec. Target Name Det. Grating Exp.Time
14:21:03.60+03:16:15.71NGC5576ACIS-SNONE8.5
14:29:40.56+03:14:00.67NGC5638ACIS-SNONE10.2
15:04:06.96+01:13:11.68NGC5831ACIS-SNONE10.3
12:51:48.00-10:27:17.21NGC4742ACIS-SNONE5.3
13:30:42.96-22:25:15.92ESO576-076ACIS-SNONE8.8
12:51:06.72+10:54:43.49NGC4733ACIS-SNONE3.5
12:42:56.40+03:40:35.54PGC042748ACIS-SNONE3.5
13:21:19.44-13:02:31.56NGC5099ACIS-SNONE5.7
12:37:48.24-01:20:41.35PGC042173ACIS-SNONE8.2
15:03:50.40+01:07:36.62PGC1185375ACIS-SNONE9.2
12:42:50.88+12:18:31.50PGC042737ACIS-SNONE11
12:43:51.12+11:28:01.31PGC042846ACIS-SNONE3.5
15:00:33.12+02:13:49.30SDSSJ150033.02+021349.1ACIS-SNONE6.3
14:58:28.56+01:32:34.91SDSSJ145828.64+013234.6ACIS-SNONE8.4
12:45:15.36+07:36:56.45PGC042982ACIS-SNONE6.4
15:01:00.96+01:00:49.68SDSSJ150100.85+010049.8ACIS-SNONE11.4
12:54:05.28-00:06:04.54PGC135814ACIS-SNONE4.5
15:02:33.12+01:56:08.95SDSSJ150233.03+015608.3ACIS-SNONE10.1
15:04:24.00+00:55:06.20PGC1179083ACIS-SNONE10.2
12:42:45.36+03:25:50.12PGC042724ACIS-SNONE1.7
15:01:16.08+01:46:24.49PGC1205406ACIS-SNONE8.5
13:31:33.84+02:11:17.16PGC135829ACIS-SNONE6.7
13:03:44.16+02:02:23.86PGC135818ACIS-SNONE3.5
12:41:45.12+04:00:23.62PGC042596ACIS-SNONE2.5
14:59:44.88+02:07:51.82SDSSJ145944.77+020752.1ACIS-SNONE8
14:58:41.04+02:20:23.50PGC1223766ACIS-SNONE9.5
12:50:07.44+02:14:52.87PGC043421ACIS-SNONE4.2
15:02:28.32+01:21:51.19PGC1192611ACIS-SNONE8.6
12:40:25.92+04:03:01.01PGC042454ACIS-SNONE2.4
22:32:13.44-41:10:09.52PGC085239ACIS-SNONE6.8
20:27:34.08-55:05:23.82PGC064718ACIS-SNONE2
02:08:21.12+10:59:47.04NGC0821ACIS-SNONE10.4
23:12:07.44-28:32:26.20NGC7507ACIS-SNONE7.3
03:28:19.63-31:04:05.09NGC1340ACIS-SNONE3.2
03:44:49.99-21:55:15.60NGC1439ACIS-SNONE7.5
03:42:49.10-22:06:30.10NGC1426ACIS-SNONE5.4
03:01:36.05-14:50:11.80NGC1172ACIS-SNONE6.5
01:47:55.30-26:53:31.88IC1729ACIS-SNONE6
03:35:14.62-20:22:25.28NGC1370ACIS-SNONE2.6
02:26:28.30+01:09:37.73IC0225ACIS-SNONE7.4
00:41:11.76-21:07:53.11ESO540-014ACIS-SNONE7.9
23:37:39.60+30:07:45.88PGC071938ACIS-SNONE7.8
00:23:04.20-27:55:37.31PGC132768ACIS-SNONE6.5
02:41:25.51-08:07:36.88PGC3097911ACIS-SNONE5.7
23:11:46.80-28:31:45.12PGC740586ACIS-SNONE5.7
20:49:40.08-32:41:53.026dFJ2049400-324154ACIS-SNONE9
02:43:10.61-00:15:45.72PGC135659ACIS-SNONE2.7
12:20:17.76+75:22:15.38NGC4291ACIS-SNONE13.7
10:18:24.96+21:53:38.29NGC3193ACIS-SNONE7.2
14:20:43.20+39:41:36.89NGC5582ACIS-SNONE9.5
12:41:44.40+74:25:15.10NGC4648ACIS-SNONE11
15:57:15.60+05:59:54.10NGC6017ACIS-SNONE12.3
10:54:48.72+17:37:13.40NGC3457ACIS-SNONE5.2
11:51:47.76+48:40:59.20NGC3457ACIS-SNONE4.5
12:07:56.64+65:06:50.40NGC4121ACIS-SNONE9.5
12:35:32.64+73:40:29.39UGC07767ACIS-SNONE8.9
10:31:06.72+28:47:47.65NGC3265ACIS-SNONE8.3
09:43:31.20+31:58:36.84NGC2970ACIS-SNONE10.6
10:52:04.32+71:46:22.91UGC05955ACIS-SNONE7.8
11:06:40.56+20:05:08.38NGC3522ACIS-SNONE5.9
12:41:60.00+32:34:25.00NGC4627ACIS-SNONE2
16:02:47.52+19:47:14.75PGC056821ACIS-SNONE11.4
15:06:34.32+01:33:31.79PGC3119319ACIS-SNONE8.7
14:58:46.08+02:58:08.36PGC1242097ACIS-SNONE11.9
09:50:10.80+28:00:47.59PGC028305ACIS-SNONE8.2
15:09:14.88+01:55:17.08PGC1210284ACIS-SNONE11.3
10:19:01.44+21:17:01.57PGC030133ACIS-SNONE4.6
15:05:50.64+01:54:30.10PGC1209872ACIS-SNONE11.2
15:11:01.44+01:40:50.20PGC1202458ACIS-SNONE11
15:04:24.72+02:06:52.67PGC1216386ACIS-SNONE11.5
15:03:44.16+02:33:08.68PGC1230503ACIS-SNONE11.7
15:09:07.92+00:43:29.17SDSSJ150907.83+004329.7ACIS-SNONE10.4
15:08:12.48+01:29:59.24rACIS-SNONE9.9
15:08:22.80+01:47:54.31PGC1206166ACIS-SNONE10.5
15:08:01.44+02:09:03.67PGC1217593ACIS-SNONE4.5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700016

Title: The Radio Lobe/ICM Interaction in the Unusual Radio Galaxy 3C 310

PI Name: Steve Murray

We propose a 60 ks observation of the hot gas around the unusual double-lobed radio galaxy 3C 310 to constrain the dynamics of the gas interaction with the radio bubbles. The radio emission from the lobes of 3C 310 show a variety of shells and filaments embedded within a larger scale diffuse emission. The southern lobe had a bright ring in the center, similar to the one seen in Her A, that may be the result of a complex interaction between the buoyant bubble and the ICM. Two merging elliptical galaxies lie at the center of the cluster gas. This observation will permit us to determine what effect that dynamic cluster gas, stirred up from the merger, had on the evolution of the radio bubble.

R.A. Dec. Target Name Det. Grating Exp.Time
15:04:57.10+26:00:59.003C 310ACIS-SNONE60

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700017

Title: Monitoring of the X-ray Jet and LMXB population of Centaurus A

PI Name: Steve Murray

We propose 2 5 ks monitoring observations of the jet and LMXB population of the nearby radio galaxy Centaurus A. These monitoring observations will be used to search for any long term variations in the X-ray brightnesses of the jet knots. Any dramatic variability would, if detected, give us important constraints on the spatial scales involved in the shock acceleration of ultra-relativistic particles. Such scales are well below the spatial resolution of Chandra and can only be probed via their temporal variability. Additionally, we will continue monitoring the brightest 100 LMXBs, and the 2 ULXs in particular, to build up a time history of the population over more than a decade.

R.A. Dec. Target Name Det. Grating Exp.Time
13:25:27.60-43:01:09.00Centaurus AACIS-INONE10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700019

Title: A Deep Chandra HETG View of Outflowing Warm Absorbers and Relativistically Blurred Emission in ESO 323-G077

PI Name: Claude Canizares

We propose a 300-ks Chandra HETG observation of ESO 323-G077, a remarkable Seyfert galaxy that shows evidence of two highly ionized warm absorbers and a relativistically broadened Fe Ka emission line (Jimenez-Bailon et al. 2008). We will use the high energy resolution of the HETG to provide the first strong constraints on the nature of the absorbers, and test the hypothesis that they form part of a two-phase outflow from the AGN. We will also this detailed parametrization of the underlying X-ray continuum and circumnuclear absorption to determine if the Fe Ka line is relativistically blurred. Finally, we will use the zero-order HETG image to explore the relationship between any spatially extended X-ray emission and the known [OIII] emission that forms the narrow-line region.

R.A. Dec. Target Name Det. Grating Exp.Time
13:06:26.10-40:24:52.00ESO 323-G077ACIS-SHETG294

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700030

Title: A Survey of X-ray Variability in Bright Broad Absorption Line Quasars Over Multi-Year Timescales

PI Name: Gordon Garmire

We propose to observe 10 optically bright BALQSOs with short (5-10 ks) Chandra observations aimed at searching for any strong X-ray variability. The targets include the optically brightest BALQSOs in the sky that already have sensitive archival X-ray observations with Chandra, XMM-Newton, or earlier missions. Our goal with these short observations is to perform a basic exploratory survey for strong X-ray variability in a sample of respectable size. We will be exploring important rest-frame timescales of up to about 5-8 years for the first time in an effective manner.

R.A. Dec. Target Name Det. Grating Exp.Time
12:56:14.20+56:52:25.00Markarian 231ACIS-SNONE5
10:04:20.10+05:13:00.00PG 1001+054ACIS-SNONE5
15:25:53.90+51:36:49.00CSO 755ACIS-SNONE5
08:04:33.10+64:59:49.00IRAS 07598+6508ACIS-SNONE7
17:01:24.80+51:49:20.00PG 1700+518ACIS-SNONE7
09:49:41.10+29:55:19.00PG 0946+301ACIS-SNONE7
14:04:38.80+43:27:07.00IRAS 14026+4341ACIS-SNONE7

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700039

Title: Studying the Optical and X-ray Emission Regions of Quasar PG1115+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+07:45:58.00PG 1115+080ACIS-SNONE45

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700051

Title: Investigating the Complexity of NGC 2992 with HETG

PI Name: Claude Canizares

NGC 2992 is a nearby (z = 0.00771) Seyfert galaxy with a variable 1.5-2 classification. Over the past 30 years, the 2-10 keV continuum flux has varied by a factor of ~20. This was accompanied by complex variability in the multi-component Fe K line emission, which may indicate violent flaring activity in the innermost regions of the accretion disk. By observing NGC 2992 with the HETG, we will obtain the best constraint to date on the FWHM of the narrow, distant-matter Fe K line emission, along with precision measurement of its centroid energy, thereby enabling more accurate modeling of the variable broad component. We will also test models of the soft excess through measurement of narrow absorption lines attributable to a warm absorber and narrow emission lines arising from photoexcitation.

R.A. Dec. Target Name Det. Grating Exp.Time
09:45:42.00-14:19:35.00NGC 2992ACIS-SHETG147

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700108

Title: The chemical composition of AGN outflows

PI Name: Jelle Kaastra

We propose a simultaneous Chandra LETGS - HST/COS observation of the bright Seyfert 1 galaxy Mrk 509, within half a year from an approved large XMM-Newton monitoring campaign. Combining 180 ks LETGS time and 10 orbits of COS time with the XMM-Newton RGS spectrum, we will obtain accurate abundances of C, N, O, Ne, Si, S, and Fe over a broad range of ionisation parameter. This allows us to determine directly the contributions from various supernova types and intermediate mass stars to the chemical enrichment processes in galaxy cores. It also will reveal directly the chemical composition of the outflow that enriches the surrounding diffuse medium. Our team has succesfully executed a similar abundances campaign on Mrk 279.

R.A. Dec. Target Name Det. Grating Exp.Time
20:44:09.80-10:43:24.70Mrk 509HRC-SLETG180

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700158

Title: UGC408: two big bangs from a modest size black hole?

PI Name: Christine Jones

UGC408 is a prime example of an interaction between an FR I radio-source and the X-ray ISM. The existing Chandra observation reveals a large (20 kpc) cavity in the X-ray gas approximately centered on the galaxy nucleus as well as X-ray emission from the nucleus and a small 5'' jet. GMRT radio observations show emission from very extended low frequency radio plasma that overfills the X-ray cavity. A comparison of the X-ray and radio images suggests that two AGN outbursts have occured. We propose a deep 95 ksec observation to 1) investigate the interaction of the radio lobes and jets with the X-ray emitting gas, 2) determine the age and total energy for each AGN outburst and 3) better characterize the structure, spectrum and extent of the X-ray jet.

R.A. Dec. Target Name Det. Grating Exp.Time
00:39:18.60+03:19:53.00UGC408ACIS-SNONE95

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700191

Title: A Chandra Observation of the Jet-Cloud Interaction in the Centaurus A Northern Middle Radio Lobe

PI Name: Ralph Kraft

We propose a 70 ks Chandra/ACIS-S observation of the brightest knot of the X-ray filament associated with the Centaurus A Northern Middle Radio Lobe (NML). Our XMM-Newton observation of this feature determined that the emission was thermal and most likely the result of a jet interaction with cold, dense gas. Our observation will study shocks and other surface brightness features in the filament to better constrain the velocities and overall energetics of the interaction. In particular, we will assess the relative importance of shock-heating versus ablation in the interaction. Cen A is the closest powerful radio galaxy, and we can study features of the jet-cloud interaction that would be unobservable in any other object.

R.A. Dec. Target Name Det. Grating Exp.Time
13:27:24.70-42:40:09.50Cen A NML FilamentACIS-SNONE70

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700216

Title: Resolving the NLR/ENLR Shocks in the Radio Galaxy Coma A

PI Name: Daniel Evans

We propose a 25-ks Chandra/ACIS-S observation of the extended narrow-line region (ENLR) in the radio galaxy Coma A - the first X-ray imaging observations of this powerful radio source. We will use Chandra's superb spatial resolution to examine the relationship between the X-ray-emitting shock-heated gas, radio jet, and optical line-emission. We will determine the role of shocks in imparting energy into the ambient IGM and assess the part that ionizing nuclear radiation plays in governing the ENLR. Coma A has key implications for AGN feedback: it is a direct analog of powerful, high-redshift, radio galaxies that are known to have large quantities of galaxy-scale cold gas. Our Chandra observation will give us a unique opportunity to spatially resolve the jet-gas feedback process in action.

R.A. Dec. Target Name Det. Grating Exp.Time
12:54:12.00+27:37:33.90Coma AACIS-SNONE25

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700218

Title: Coordinated Multiwavelength Observations of New TeV Blazars Detected by VERITAS

PI Name: Markus Boettcher

We propose a 40 ksec ACIS-S ToO observation on a new TeV gamma-ray blazar detected in a very-high-energy (VHE) gamma-ray flaring state by VERITAS. The proposed Chandra observations will be coordinated with ground-based radio, infrared, and optical observations as well as VERITAS VHE gamma-ray observations. Together with the guaranteed MeV - GeV gamma-ray coverage by Fermi, this will provide as complete coverage of the entire broadband spectral energy distribution as currently feasible. Simultaneous coverage of the entire broadband spectrum is crucial to put stringent constraints on gamma-ray emission models of blazars as well as the extragalactic background light.

R.A. Dec. Target Name Det. Grating Exp.Time
00:18:27.70+29:47:30.00RBS 0042ACIS-SNONE40
00:35:52.60+59:50:05.001ES 0033+595ACIS-SNONE40
01:10:04.80+41:49:51.00RGB J0110+418ACIS-SNONE40
01:23:08.60+34:20:49.001ES 0120+340ACIS-SNONE40
01:53:25.80+71:15:06.00RGB J0153+712ACIS-SNONE40
02:14:17.90+51:44:52.00RGB J0214+517ACIS-SNONE40
02:16:32.10+23:14:47.00RBS 0298ACIS-SNONE40
02:22:39.60+43:02:08.003C66AACIS-SNONE40
03:14:02.70+24:44:33.00RGB J0314+247ACIS-SNONE40
03:19:51.80+18:45:34.00RBS 0413ACIS-SNONE40
04:41:27.40+15:04:55.001RXS J0441+1504ACIS-SNONE40
04:50:07.20+45:03:12.001ES 0446+449ACIS-SNONE40
06:50:46.50+25:03:00.001ES 0647+250ACIS-SNONE40
06:56:10.60+42:37:03.00RGB J0656+426ACIS-SNONE40
08:09:49.20+52:18:58.001ES 0806+524ACIS-SNONE40
08:31:48.90+04:29:39.00PKS 0829+046ACIS-SNONE40
09:30:37.60+49:50:26.001ES 0927+500ACIS-SNONE40
10:31:18.50+50:53:36.001ES 1028+511ACIS-SNONE40
10:56:06.60+02:52:14.00RBS 0921ACIS-SNONE40
10:58:37.70+56:28:11.00RGB J1058+564ACIS-SNONE40
11:00:21.10+40:19:28.00RBS 0929ACIS-SNONE40
11:09:16.10+24:11:20.001ES 1106+244ACIS-SNONE40
11:17:06.20+20:14:07.00RGB J1117+202ACIS-SNONE40
11:20:48.00+42:12:12.001ES 1118+424ACIS-SNONE40
11:36:30.10+67:37:04.00RBS 1004ACIS-SNONE40
12:15:12.00+07:32:05.001ES 1212+078ACIS-SNONE40
12:17:52.10+30:07:01.001ES 1215+303ACIS-SNONE40
12:21:21.90+30:10:37.001ES 1218+304ACIS-SNONE40
12:41:48.30+06:36:01.001ES 1239+069ACIS-SNONE40
12:56:11.10-05:47:21.503C279ACIS-SNONE40
13:26:14.90+29:33:32.00RX J1326.2+2933ACIS-SNONE40
14:42:48.30+12:00:40.001ES 1440+122ACIS-SNONE40
15:32:02.20+30:16:29.00RGB J1532+302ACIS-SNONE40
16:10:02.60+67:10:30.00RGB J1610+671ACIS-SNONE40
17:28:18.60+50:13:10.001ES 1727+502ACIS-SNONE40
17:28:25.00+04:27:05.00PKS 1725+044ACIS-SNONE40
17:43:57.80+19:35:09.001ES 1741+196ACIS-SNONE40
23:22:44.00+34:36:14.00RGB J2322+346ACIS-SNONE40
23:23:52.10+42:10:59.001ES 2321+419ACIS-SNONE40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700256

Title: The nature of X-ray jets in powerful core-dominated quasars

PI Name: Martin Hardcastle

There is considerable debate about the nature of the X-ray emission from the jets of core-dominated radio-loud quasars (CDQ). A popular model proposes that it is due to inverse-Compton scattering of microwave background photons; however, there are some serious observational and theoretical arguments against this model. Determining the X-ray emission mechanism has significant implications. The inverse-Compton model implies a large bulk Lorentz factor that persists to kpc scales: constraints on jet speeds affect our understanding of jet formation, evolution and feedback. Here we propose to carry out a straightforward test of a fundamental prediction of the inverse-Compton model by constraining the X-ray spectra of jets in a small sample of CDQ and comparing them with radio measurements.

R.A. Dec. Target Name Det. Grating Exp.Time
06:07:59.70-08:34:50.00PKS 0605-085ACIS-SNONE60
15:12:50.50-09:05:59.90PKS 1510-089ACIS-SNONE50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700257

Title: Rapid Follow-Up Observations of Tidal Disruption Events Discovered by Pan-STARRS1

PI Name: Suvi Gezari

We propose for rapid follow-up Chandra TOO ACIS-S observations and HST/COS NUV imaging and FUV low-resolution spectroscopy of 5 flares from the tidal disruption of stars by supermassive black holes discovered in the Pan-STARRS1 Medium Deep Survey. With TOO observations obtained within a month of the peak of the flare, and 5 months later, we aim to 1) constrain the flare's broadband SED and bolometric luminosity, 2) follow the decay of the flare and look for spectral evolution, and 3) place strong limits on the presence of a persistent AGN nucleus. Tidal disruption events provide a cosmic laboratory to study the physics of accretion onto black holes, and are a unique probe of the mass of black holes in the nuclei of distant galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
TDE_PS1_1ACIS-SNONE100
TDE_PS1_2ACIS-SNONE100
TDE_PS1_3ACIS-SNONE100

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700259

Title: X-ray Signatures of Accretion in AGNs with Intermediate-mass Black Holes

PI Name: Luis Ho

Supermassive (10^6-10^9 solar mass) black holes (BHs) are closely linked with the evolution of early-type galaxies. Our group has discovered a new class of AGNs with intermediate-mass (10^4-10^6 solar mass) BHs in late-type galaxies. These objects offer important clues to the nature of the seeds of quasars, and their mergers may produce significant gravity waves. We have started to systematically study their multiwavelength properties. A pilot Chandra program revealed that they are unusually X-ray bright, possibly because their low BH masses and high accretion rates sustain a slim accretion disk. We propose to extend and confirm our preliminary results by performing a comprehensive survey of the X-ray properties of a larger sample of this new class of AGNs.

R.A. Dec. Target Name Det. Grating Exp.Time
00:01:11.10+10:01:55.50SDSS J000111.15-100155.5ACIS-SNONE2
02:28:49.50-09:01:53.70SDSS J022849.51-090153.7ACIS-SNONE2
03:04:17.80+00:28:27.30SDSS J030417.78+002827.3ACIS-SNONE2
07:31:06.90+39:26:44.60SDSS J073106.86+392644.6ACIS-SNONE2
08:06:29.80+24:19:55.60SDSS J080629.80+241955.6ACIS-SNONE2
08:09:07.60+44:16:41.40SDSS J080907.58+441641.4ACIS-SNONE2
08:15:50.20+25:06:40.90SDSS J081550.23+250640.9ACIS-SNONE2
08:24:43.30+29:59:23.50SDSS J082443.28+295923.5ACIS-SNONE2
08:51:52.60+52:28:32.90SDSS J085152.62+522832.9ACIS-SNONE2
09:03:21.00+04:57:38.00SDSS J090320.97+045738.0ACIS-SNONE2
09:24:38.90+56:07:46.90SDSS J092438.88+560746.9ACIS-SNONE2
09:33:08.90+53:47:48.90SDSS J093308.88+534748.9ACIS-SNONE2
09:40:57.20+03:24:01.20SDSS J094057.19+032401.2ACIS-SNONE2
09:53:30.50+56:26:53.40SDSS J095330.53+562653.4ACIS-SNONE2
09:54:38.80+40:32:04.20SDSS J095438.78+403204.2ACIS-SNONE2
10:35:18.70+07:34:06.20SDSS J103518.74+073406.2ACIS-SNONE2
10:57:55.70+48:25:02.00SDSS J105755.66+482502.0ACIS-SNONE2
11:05:02.00+59:41:03.60SDSS J110501.97+594103.6ACIS-SNONE2
11:25:26.50+02:20:39.00SDSS J112526.51+022039.0ACIS-SNONE2
11:36:38.40+42:45:52.90SDSS J113638.38+424552.9ACIS-SNONE2
11:36:57.70+41:13:18.50SDSS J113657.68+411318.5ACIS-SNONE2
11:43:43.80+55:00:19.30SDSS J114343.76+550019.3ACIS-SNONE2
11:51:38.10+56:13:31.90SDSS J115138.10+561331.9ACIS-SNONE2
11:53:41.80+46:12:42.20SDSS J115341.77+461242.2ACIS-SNONE2
12:15:18.20+01:47:51.10SDSS J121518.23+014751.1ACIS-SNONE2
12:23:42.80+58:14:46.10SDSS J122342.81+581446.1ACIS-SNONE2
12:27:11.70+63:06:46.80SDSS J122711.67+630646.8ACIS-SNONE2
12:53:59.60+46:27:50.10SDSS J125359.62+462750.1ACIS-SNONE2
13:08:03.90+50:52:26.70SDSS J130803.88+505226.7ACIS-SNONE2
13:13:10.10+05:19:42.10SDSS J131310.12+051942.1ACIS-SNONE2
13:16:51.30+05:56:46.90SDSS J131651.29+055646.9ACIS-SNONE2
13:19:26.50+10:56:10.90SDSS J131926.52+105610.9ACIS-SNONE2
13:22:24.40+42:26:43.30SDSS J132224.40+422643.3ACIS-SNONE2
13:47:38.20+47:43:01.90SDSS J134738.23+474301.9ACIS-SNONE2
14:33:10.50+52:58:30.50SDSS J143310.54+525830.5ACIS-SNONE2
14:40:52.60-02:35:06.20SDSS J144052.60-023506.2ACIS-SNONE2
15:34:25.60+04:08:06.70SDSS J153425.59+040806.7ACIS-SNONE2
15:36:56.40+31:22:48.10SDSS J153656.44+312248.1ACIS-SNONE2
15:41:50.90+31:00:37.20SDSS J154150.85+310037.2ACIS-SNONE2
15:42:57.50+03:06:53.20SDSS J154257.49+030653.2ACIS-SNONE2
15:59:09.60+35:01:47.40SDSS J155909.62+350147.4ACIS-SNONE2
16:17:52.00-00:19:57.40SDSS J161751.98-001957.4ACIS-SNONE2
16:24:03.60-00:54:10.30SDSS J162403.63-005410.3ACIS-SNONE2
16:26:36.40+35:02:42.00SDSS J162636.40+350242.0ACIS-SNONE2
16:31:59.60+24:37:40.20SDSS J163159.59+243740.2ACIS-SNONE2
16:32:28.90-00:28:43.80SDSS J163228.88-002843.8ACIS-SNONE2
16:56:37.00+37:14:39.50SDSS J165636.98+371439.5ACIS-SNONE2
20:58:22.10-06:50:04.30SDSS J205822.14-065004.3ACIS-SNONE2
23:48:07.10-09:12:02.60SDSS J234807.14-091202.6ACIS-SNONE2
23:58:33.20+00:34:53.60SDSS J235833.20+003453.6ACIS-SNONE2

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700262

Title: Hunting for Intrinsically X-ray Weak Quasars: The Case of PHL 1811 Analogs

PI Name: William Brandt

A central dogma of X-ray astronomy is that luminous X-ray emission is a universal property of efficiently accreting supermassive black holes. One interesting challenge to this idea has come from the quasar PHL 1811 which appears to be intrinsically X-ray weak and also has distinctive emission-line properties. We propose to observe a sample of eight SDSS quasars, selected to have similar UV emission-line properties to that of PHL 1811, to test if they are also X-ray weak. Our analyses of the currently available X-ray data appear to support this hypothesis but do not provide a proper test. Our results will have implications for the nature of accretion-disk coronae, emission-line formation, and AGN selection.

R.A. Dec. Target Name Det. Grating Exp.Time
09:46:02.30+27:44:07.00SDSS J0946+2744ACIS-SNONE5
00:00:09.40+13:56:18.40SDSS J0000+1356ACIS-SNONE9.6
09:03:12.20+07:08:32.40SDSS J0903+0708ACIS-SNONE11.5
08:48:42.60+54:08:08.20SDSS J0848+5408ACIS-SNONE13.2
12:30:35.50+33:20:00.50SDSS J1230+3320ACIS-SNONE5.3
14:54:53.50+03:24:56.80SDSS J1454+0324ACIS-SNONE6.3
11:25:51.90+50:28:03.60SDSS J1125+5028ACIS-SNONE9.8
16:18:01.70+07:04:50.20SDSS J1618+0704ACIS-SNONE7.6

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700264

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
03:51:35.80-27:44:33.80PKS 0349-27ACIS-SNONE20
04:44:37.70-28:09:54.60PKS 0442-28ACIS-SNONE20
06:21:43.30-52:41:33.30PKS 0620-52ACIS-SNONE20
06:27:06.70-35:29:16.30PKS 0625-35ACIS-SNONE20
08:08:53.60-10:27:40.20PKS 0806-10ACIS-SNONE20
17:37:35.80-56:34:03.40PKS 1733-56ACIS-SNONE20
18:19:35.00-63:45:48.10PKS 1814-63ACIS-SNONE20
19:39:25.00-63:42:45.60PKS 1934-63ACIS-SNONE20
19:58:16.10-55:09:37.50PKS 1954-55ACIS-SNONE20
22:14:25.80-17:01:36.20PKS 2211-17ACIS-SNONE20
23:59:04.50-60:54:59.10PKS 2356-61ACIS-SNONE20

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700324

Title: Weak-line Quasars: Always X-ray Weak?

PI Name: Karen Leighly

We propose to explore the link between the shape of the spectral energy distribution and UV emission lines in quasars. Detailed study of the bright quasar PHL 1811 shows that the unusual emission line properties including low high-ionization lines, absent forbidden and semiforbidden lines and strong SiII and FeII are a consequence of its persistently X-ray weak SED. Are all objects with weak lines also X-ray weak? To test this hypothesis, we use an automated fitting program to construct a sample of SDSS quasars with spectra similar to that of PHL 1811, and select 10 objects with CIV equivalent widths less than 10 angstroms (a factor of 3 lower than typical) yet bright enough for detection even if a factor of 11 weaker in X-rays than typical quasars.

R.A. Dec. Target Name Det. Grating Exp.Time
09:42:09.20+52:07:14.90SDSS J094209.15+520714.7ACIS-SNONE5.6
21:59:54.50-00:21:50.20SDSS J215954.45-002150.1ACIS-SNONE7.7
15:23:07.30+53:53:58.40SDSS J152307.34+535358.1ACIS-SNONE9.7

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700352

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
flaring TeV BLLacACIS-SNONE30

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700365

Title: The X-ray - TeV Connection in 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 light curve for comparison with those obtained by the Cherenkov observatories.

R.A. Dec. Target Name Det. Grating Exp.Time
12:30:49.00+12:23:30.00M87ACIS-SNONE45
12:30:49.00+12:23:30.00M87ACIS-SNONE45

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700377

Title: The Cavities and Jet-cloud Interaction of PKS B2152-699

PI Name: Andrew Young

We propose a deep, 125 ksec Chandra ACIS observation of the powerful radio galaxy PKS B2152-699. An existing short ~14 ksec Chandra observation has shown i) cavities being inflated in the inter-stellar medium (ISM) by the radio lobes, and ii) X-ray emission from a jet-cloud interaction region about 10" northeast of the nucleus where the jet is running into a cloud of dense gas and being deflected. As a result, PKS B2152-699 is the best source for estimating both the time-averaged jet power and instantaneous jet power in a single system. In addition, we propose optical integral field unit spectroscopy of the jet-cloud interaction region to complement the X-ray data to understand how this gas is being ionized.

R.A. Dec. Target Name Det. Grating Exp.Time
21:57:06.00-69:41:24.00PKS B2152-699ACIS-INONE125

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700489

Title: Deeply embedded AGNs in infrared ultraluminous starbursts

PI Name: Guido Risaliti

We propose to observe a small group of three Ultraluminous Infrared Galaxies optically classified as starburst or LINER, which according to our analysis based on Spitzer 5-8 micron spectra hide obscured active nuclei. These AGNs account for >50% of the total source luminosity, which puts them among the few known QSO2s al low redshift (z<0.25). The Chandra observations will test our prediction, possibly providing a direct evidence of these hidden nuclei. While it is well assessed that most of the luminosity of local ULIRGs is due to starbursts, our observations would further increase the fraction of these objects known to host a heavily obscured AGN.

R.A. Dec. Target Name Det. Grating Exp.Time
01:32:21.40-07:29:08.00IRAS 01298-0744ACIS-SNONE20
00:42:15.50-12:56:03.00IRAS 00397-1312ACIS-SNONE45
12:15:18.90-14:29:45.00IRAS 12127-1412ACIS-SNONE35

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700501

Title: The Size of Quasar Non-Thermal/X-ray Emission Regions

PI Name: Christopher Kochanek

We will use microlensing, where the stars in a lens galaxy magnify the accretion disk of a gravitationally lensed quasar, to measure the sizes of the X-ray emission regions of 7 gravitationally lensed quasars with well-sampled optical light curves and accretion disk size measurements. We will use these to determine the scaling of the non-thermal emission regions with black hole mass. For two active'' systems, RXJ1131-1231 and Q2237+0305, we will use longer observations in order to measure the X-ray energy dependence of the size. We have HST time to monitor the 6 with UV flux to probe thermal emission from near the inner edge of the disk. These observations can only be done with Chandra because future X-ray observatories will lack the necessary angular resolution.

R.A. Dec. Target Name Det. Grating Exp.Time
22:40:30.30+03:21:28.80Q2237+0305ACIS-SNONE180
11:31:51.60-12:31:57.00RXJ1131-1231ACIS-SNONE162
10:04:34.20+41:12:44.00SDSS1004+4112ACIS-SNONE24
04:38:14.90-12:17:14.40HE0435-1223ACIS-SNONE39
11:06:33.50-18:21:24.20HE1104-1805ACIS-SNONE39
01:58:41.40-43:25:04.20QJ0158-4325ACIS-SNONE30
09:24:55.90+02:19:24.90SDSS0924+0219ACIS-SNONE110

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700503

Title: Is there an AGN in the Blue Compact Dwarf Galaxy Mrk 996?

PI Name: Antonis Georgakakis

We propose Chandra/ACIS-S observations to explore suggestions that at least some Blue Compact Dwarf Galaxies (BCDs) host AGN. Mrk 996 is an excellent test-case for this scenario. It has a unique set of observations, which allude to the presence of an AGN, yet many of its properties are typical of the overall BCD population. The detection of an AGN in Mrk 996 would demonstrate that black hole growth is taking place in low mass/metallicity BCDs, which are thought to be the local analogues of the first galaxies that formed in the early Universe out of near-primordial gas. This would offer a solution to the origin of seed black holes postulated by cosmological simulations in the early Universe to build the supermassive black holes at the centres of large spheroids.

R.A. Dec. Target Name Det. Grating Exp.Time
01:27:35.50-06:19:36.00MRK996ACIS-SNONE50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700510

Title: The environmental and epoch dependence of radio-loud AGN feedback

PI Name: Judith Croston

Feedback from radio-loud AGN outbursts is now thought to be an important ingredient in galaxy formation models, potentially solving the cooling flow' problem in cluster centres and helping to resolve long-standing problems in reconciling CDM models with observed properties of groups and clusters. Now that the role of radio-loud AGN feedback is established, the next step is to understand the relationship between radio-loud AGN energy input, environment and epoch, which appears complex and is currently poorly understood. This Chandra Large Project aims to address this question by characterizing the environments of a unique sample of radio galaxies spanning three orders of magnitude in radio luminosity at a single, cosmologically interesting redshift.

R.A. Dec. Target Name Det. Grating Exp.Time
13:01:25.00+36:58:09.40TOOT 1301+3658ACIS-SNONE40
12:55:55.80+35:56:35.80TOOT 1255+3556ACIS-SNONE40
16:26:48.50+45:23:42.60TOOT 1626+4523ACIS-SNONE40
16:30:32.80+45:34:26.00TOOT 1630+4534ACIS-SNONE40
13:07:27.10+36:39:16.40TOOT 1307+3639ACIS-SNONE40
17:31:43.80+66:38:56.707C 1731+6638ACIS-SNONE40
13:03:10.30+33:34:07.00TOOT 1303+3334ACIS-SNONE40
02:19:37.80+34:23:11.207C 0219+3423ACIS-SNONE40
08:50:24.80+37:47:09.106C 0850+3747ACIS-SNONE40
11:32:45.70+34:39:36.206C 1132+3439ACIS-SNONE40

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700538

Title: NGC1266: Local Candidate for AGN Feedback

PI Name: Leo Blitz

We propose to use Chandra to probe the unique early-type galaxy NGC 1266, in which we may be directly observing the truncation of star formation via feedback, taking advantage of Chandra's superior spatial and spectral resolution. We will combine a 30ks Chandra ACIS-S observation with our existing multi-wavelength suite of data and with detailed theoretical modeling. The X-ray data are an integral component in the analysis of this object and will provide information unavailable in other wavebands, including whether the source of NGC 1266's large-scale ouflow is an AGN or a starburst and how the outflow is affecting the galaxy's ISM. This information will thus enable a new and more nuanced understanding of the role of feedback in truncating star formation in early-type galaxies.

R.A. Dec. Target Name Det. Grating Exp.Time
03:16:00.80-02:25:38.50NGC1266ACIS-SNONE30

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700550

Title: Imaging Strong Shocks in the Compact Steep Spectrum Radio Galaxy B3 1445+410

PI Name: Christopher O'Dea

Strong shocks are expected to be important during the AGN dominated epochs of galaxy formation and evolution. However these shocks have not yet been detected at high redshifts. Here we propose to observe a radio galaxy which should produce strong shocks, but at a redshift where we can detect and resolve the hot gas easily. This is only possible because we will observe a relatively nearby young radio galaxy. Using XMM we found evidence for a strong shock (Mach 13) around the Compact Steep Spectrum (CSS) Radio Galaxy 3C303.1. We propose to obtain Chandra imaging of the CSS source B3 1445+410 which is larger and lower redshift than 3C303.1. These observations will provide the key next step in the study of radio source propagation and feedback to the host galaxy.

R.A. Dec. Target Name Det. Grating Exp.Time
14:47:12.80+40:47:45.00B3 1445+410ACIS-SNONE75

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700556

PI Name: Jennifer Donley

While most Type 1 AGN show little or no X-ray obscuration, ~10% are heavily obscured in the X-ray with column densities typical of Type 2 objects. We propose to observe with Chandra a sample of 6 such AGN, which appear to defy the most fundamental assumptions of the unified model. Chandra observations are critical to place tighter constraints on the level of obscuration and to check whether it is variable. When combined with Spitzer and optical polarimetric data, the Chandra data will allow us to test for the first time the many potential explanations for the strange properties of these AGN. Our study will provide unique insights into the structures and processes active in and around the central engines of AGN, and will provide a demanding test of the unified model.

R.A. Dec. Target Name Det. Grating Exp.Time
05:40:45.70-28:39:08.00HELLAS2XMM 05370175ACIS-SNONE23
23:59:39.80-25:00:57.00HELLAS2XMM 26900039ACIS-SNONE5
03:33:39.50-39:18:41.40RXJ033340.22-391833.4ACIS-SNONE5
13:10:53.40+30:04:30.00AXJ131054+3004ACIS-SNONE5
10:47:23.50+54:04:06.70RXJ104723.37+540412.6ACIS-SNONE16
13:17:26.00+32:02:59.90AXJ131724+3203ACIS-SNONE5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700633

Title: Variability and particle acceleration in the jet of Pictor A

PI Name: Martin Hardcastle

Pictor A is one of the closest FRII radio galaxies and one of a very few to show a continuous, bright, 100-kpc-scale X-ray jet. It thus represents a crucial link between low-power FRIIs with weak discrete jet knots described by an X-ray synchrotron model and powerful core-dominated quasars whose X-ray jets are often modeled as beamed inverse-Compton. It is vital to understand the nature of the jet emission in this key object. We propose a long observation that will give us a substantial improvement in spectroscopy and imaging of the bright inner jet, and will in addition allow us to confirm the first, but so far only marginally significant detection, of variability in an FRII X-ray jet. Many additional projects can be carried out with these observations.

R.A. Dec. Target Name Det. Grating Exp.Time
05:19:44.00-45:46:32.00Pictor A JetACIS-SNONE60

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700638

Title: Strong radio AGN in the center of galaxy groups

PI Name: Ming Sun

Outbursts of radio AGN have significant impact on structure formation and evolution. Radio feedback can quench cooling flows and modify cluster scaling relations. It has been suggested that a cool core is always required for strong radio AGN of BCGs. However, groups and clusters with strong central radio AGN previously observed by Chandra are almost all X-ray selected. We propose to observe a complete sample of groups with strong central radio AGN, optically selected from SDSS. Without X-ray selection criteria, this sample will test the ubiquitous connection of cool cores and strong radio AGN of BCGs. The selected radio AGN are expected to leave significant imprints on the surrounding ICM (e.g., cavities, shocks, reduced gas fraction and elevated entropy), which will also be examined.

R.A. Dec. Target Name Det. Grating Exp.Time
01:31:32.90+00:33:22.00A208ACIS-SNONE25
09:02:36.80+52:03:48.00A736ACIS-SNONE40
08:47:53.10+53:52:35.00NGC 2656ACIS-SNONE12
10:51:47.40+55:23:12.00C4-DR5-3164ACIS-SNONE22
23:59:58.70+00:42:06.50C4-DR5-2073ACIS-SNONE25
16:39:20.10+29:50:59.00C4-DR5-3843ACIS-SNONE32

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700645

Title: A Joint Chandra, Fermi, MAGIC, and VERITAS Broadband Study of One High-Energy Blazar in A Major Outburst

PI Name: Alexander Konopelko

The main objective of the proposed work is to perform a single very intensive observational campaign at radio, X-ray, GeV, and TeV energies on one of the well-established northern sky TeV blazars, i.e., Mkn 501, 1ES 1959+650, H1426+428, or 1ES 2344+514 with Chandra, Fermi, MAGIC, and VERITAS.During planned multi-wavelength campaign the SED of one blazar will be covered by simultaneous observations with VLBI, Chandra, Fermi, MAGIC, and VERITAS all the way from radio through TeV γ rays. Our scientiﬁc goal is to derive ma jor physical parameters of the AGN jet by reproducing the complete SED, using both leptonic and hadronic models, which can infer the bulk Lorentz factor and the total power of the jet.

R.A. Dec. Target Name Det. Grating Exp.Time
16:53:52.20+39:45:36.60Mrk 501ACIS-SNONE15
19:59:59.90+65:08:54.601ES 1959+650ACIS-SNONE15
14:28:32.60+42:40:29.00H 1426+428ACIS-SNONE15
23:47:04.90+51:42:17.801ES 2344+514ACIS-SNONE15
11:04:27.30+38:12:31.70Mrk 421ACIS-SNONE15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700685

Title: The nature of the variable X-ray absorber in ESO 362-G18

PI Name: Giovanni Miniutti

We propose a monitoring program of ESO 362-G18, a X-ray bright local Seyfert 1.5 which exhibits significant variation of the properties of the X-ray absorber on relatively short timescales. We identify a likely variability timescale of 1 week, and we propose to monitor the source for 2 weeks and explore all shorter timescales by making use of Chandra and XMM-Newton unique capabilities. We request a total of 5x10 ks time-constrained observations with Chandra and 1x75 ks unconstrained observation with XMM-Newton.

R.A. Dec. Target Name Det. Grating Exp.Time
05:19:35.80-32:39:28.00ESO 362-G18ACIS-SNONE50

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700688

Title: AGN ignition in the galaxy group environment

PI Name: John Silverman

We aim to determine whether galaxy groups, a site of accelerated galaxy evolution and merging, are conducive for accretion onto supermassive black holes (SMBHs). We propose to observe 25 low-redshift (z~0.055) galaxy groups from the 2dFGRS with Chandra/ACIS-I for 10 ksec each to determine their AGN content (L_X>10^41 erg/s) unhampered by obscuration. We will determine whether external or internal processes are important drivers of SMBH growth by utilizing the full morphological information (e.g., bulge-to-disk ratio, asymmetry, tidal features) of AGN hosts available from the ZENS survey. Furthermore, we can determine how the environment regulates both AGN accretion and star formation in the intermediate potential wells of galaxy groups.

R.A. Dec. Target Name Det. Grating Exp.Time
02:37:12.10-25:25:35.802PIGG_1571ACIS-INONE5
02:37:12.10-25:25:35.802PIGG_1571ACIS-INONE5
09:53:36.80-05:07:05.402PIGG_m1610ACIS-INONE5
09:53:36.80-05:07:05.402PIGG_m1610ACIS-INONE5
09:54:40.70-04:04:56.902PIGG_m1702ACIS-INONE5
09:54:40.70-04:04:56.902PIGG_m1702ACIS-INONE5
09:59:34.70-05:21:49.002PIGG_m1347ACIS-INONE5
09:59:34.70-05:21:49.002PIGG_m1347ACIS-INONE5
10:15:37.80-05:33:43.602PIGG_m1480ACIS-INONE5
10:15:37.80-05:33:43.602PIGG_m1480ACIS-INONE5
10:17:55.30-01:24:41.702PIGG_m1320ACIS-INONE5
10:17:55.30-01:24:41.702PIGG_m1320ACIS-INONE5
11:17:58.80-04:25:28.502PIGG_m1441ACIS-INONE5
11:17:58.80-04:25:28.502PIGG_m1441ACIS-INONE5
14:27:58.50-02:30:41.602PIGG_m1381ACIS-INONE5
14:27:58.50-02:30:41.602PIGG_m1381ACIS-INONE5
14:35:45.20-01:22:20.902PIGG_m1598ACIS-INONE5
14:35:45.20-01:22:20.902PIGG_m1598ACIS-INONE5
14:40:11.20-03:40:14.602PIGG_m1746ACIS-INONE5
14:40:11.20-03:40:14.602PIGG_m1746ACIS-INONE5
22:21:05.00-25:59:54.502PIGG_1752ACIS-INONE5
22:21:05.00-25:59:54.502PIGG_1752ACIS-INONE5
22:23:44.90-29:59:02.802PIGG_1671ACIS-INONE5
22:23:44.90-29:59:02.802PIGG_1671ACIS-INONE5

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700706

Title: Chandra deciphers the Optically 'Dull' X-ray Bright Galaxies at z~0.

PI Name: Anca Constantin

X-ray Bright Optically Normal Galaxies (XBONGs) are a rare puzzle in the AGN menagerie, showing AGN-like X-ray luminosity (logLx>42) but no optical line emission. Are they optically passive because of host galaxy dilution in the spectroscopic apertures? Obscuration by circumnuclear dust? Or are they instead X-ray bright due to radiatively inefficient accretion flows (RIAFs) which lack an ionizing UV bump? Or X-ray flaring? Or extended emission from hot gas? XBONGs to date have redshifts too high or S/N too low for reliable classification or detailed study. For a small carefully-vetted sample of local XBONGs from the SDSS and ROSAT All Sky Survey, we propose to use Chandra X-ray fluxes, morphologies, and spectra to test all 5 hypotheses.

R.A. Dec. Target Name Det. Grating Exp.Time
08:14:56.30+38:27:02.30SDSS J081456.30+382702.3ACIS-SNONE8.2
08:54:51.30+30:53:20.60SDSS J085451.27+305320.6ACIS-SNONE10.5
10:58:41.50+41:08:24.60SDSS J105841.53+410824.6ACIS-SNONE8.1
12:00:46.30+48:34:37.60SDSS J120046.28+483437.6ACIS-SNONE14.2
13:08:02.10+55:38:50.60SDSS J130802.04+553850.7ACIS-SNONE13.9
14:52:00.50+44:31:21.30SDSS J145200.52+443121.2ACIS-SNONE9.6
20:47:44.80-06:18:46.70SDSS J204744.81-061846.7ACIS-SNONE11.7
21:24:03.00+11:47:50.40SDSS J212402.97+114750.3ACIS-SNONE14.2

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700740

Title: Investigating the Nuclear Activity of Barred and Unbarred Spiral Galaxies

PI Name: Leigh Jenkins

We propose to complete Chandra observations of a well-defined, well-matched sample of 32 nearby (d<70 Mpc) barred and unbarred spiral galaxies. Twelve galaxies are currently unobserved, and we request a total of 180ks of ACIS-S observations (15ks each) to complete this unique survey. The aim of this X-ray study is to search for low-luminosity AGN activity (down to 5e39 erg/s) that optical observations may have been unable to detect. In conjunction with uniform multiwavelength bar and nuclear morphology classifications, this will allow us to determine what effect the presence/absence of a bar/nuclear feature has on the detection and strength of the X-ray nuclei. This is the first X-ray study of its kind, and has great potential to shed light on the long-standing questions of AGN fueling.

R.A. Dec. Target Name Det. Grating Exp.Time
09:50:22.20+72:16:44.40NGC 2985ACIS-SNONE15
12:00:23.60-01:05:59.30NGC 4030ACIS-SNONE15
14:37:53.40-00:23:55.40NGC 5691ACIS-SNONE15
06:08:02.10-21:44:48.00NGC 2179ACIS-SNONE15
04:23:27.00+75:17:45.50NGC 1530ACIS-SNONE15
13:16:58.30-16:38:05.00NGC 5054ACIS-SNONE15
21:41:19.90-63:54:28.90NGC 7096ACIS-SNONE15
04:41:36.50-01:48:33.60NGC 1638ACIS-SNONE15
10:10:10.00-12:26:00.90NGC 3145ACIS-SNONE15
13:04:14.30-10:20:22.70NGC 4939ACIS-SNONE15
14:24:07.70+34:51:32.10NGC 5614ACIS-SNONE15
02:01:06.50-06:48:57.10NGC 788ACIS-SNONE15

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700813

Title: Determining the Nature of the Faintest Hard X-ray Selected AGN with Chandra

PI Name: Shanil Virani

We propose to complete the X-ray spectral characterization of our 3-Ms Ultra-Deep INTEGRAL Survey with Chandra observations of 5 faint AGN. Combining the Chandra and INTEGRAL spectra will allow us to fit for the absorbing column density and the intensity of the Compton reflection component, both fundamental parameters in understanding the AGN population. Deriving a correct census of heavily obscured AGN is the last piece of the puzzle, hampered by strong bias against detection in the 0.1-10 keV band. We have supporting multi-wavelength observations for all sources, critical to measure other source parameters like bolometric luminosity, re-radiated emission, black hole mass, etc.

R.A. Dec. Target Name Det. Grating Exp.Time
01:52:01.70-05:30:13.00UISJ01517-0533ACIS-SNONE10
01:40:20.60-07:54:54.00UISJ01400-0757ACIS-SNONE10
03:00:04.30-10:49:29.00UISJ02599-1046ACIS-SNONE10
02:08:43.60-07:49:49.00UISJ02088-0750ACIS-SNONE10

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700815

Title: Chandra ToO Observations of Flaring Fermi Blazars

We propose for two 25 ks ToO observations of blazars (or any other high latitude sources) undergoing an exceptional flare in the Fermi gamma-ray band. We intend to use Chandra only if observations with other facilities such as Suzaku or Swift are not sufficiently sensitive, or cannot reach the source because of the Solar angle or scheduling constraints. 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
Fermi-triggered ToO No. 1ACIS-SNONE25
Fermi-triggered ToO No. 2ACIS-SNONE25

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700840

Title: Spent synchrotron lobes in giant radio galaxies: how much energy do they store?

PI Name: Katherine Blundell

We wish to make deep observations of giant radio galaxies having known X-ray emission extended along their radio axes, associated with the oldest part of the synchrotron lobes that straddle their respective active galactic nuclei. We wish to establish the spatial extent of these inverse Compton scattered CMB photons that give the observed X-rays since this emission traces the presence of particles with Lorentz Factor ~ 1000. This is an extremely important clue in establishing the so-called "low-energy cutoff", the Lorentz factor at which the particle energy distribution turns over at low energies: determining this is crucial for quantifying the amount of energy that these lobes store and can deposit in the IGM

R.A. Dec. Target Name Det. Grating Exp.Time
21:07:14.80+23:31:45.004C23.56ACIS-SNONE100

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700858

Title: Jet-ISM Interactions in a Restarting Radio Galaxy 4C 29.30

PI Name: Aneta Siemiginowska

We propose to study interactions between radio plasma and ISM with a deep 300ksec Chandra ACIS-S observation of a low redshift radio galaxy, 4C 29.30 where the complexity of such interactions is uniquely displayed allowing a direct mapping of the initial stage of the radio source growth. The high resolution Chandra image will match the resolution of optical and radio structures observed in this source. The X-ray morphology will provide the critical information needed for studying physical conditions and understanding the impact of the evolving radio source onto the host galaxy environment. Our target presents a great laboratory to study the physical mechanisms of AGN feedback, and so provide strong constraints on models of galaxy evolution.

R.A. Dec. Target Name Det. Grating Exp.Time
08:40:02.40+29:49:02.604c+29.30ACIS-SNONE300

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700880

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. We proposed snapshot survey (6~ks exposure each) of 10 polar BALQSOs during Cycle~10 and only 3 BALQSOs were approved. Two of these three BALQSOs have been recently observed with Chandra and the results clear show that they are extremely luminous with no intrinsic absorption. Thus, we propose snapshot survey (6~ks exposure each) of rest 7 polar BALQSOs.

R.A. Dec. Target Name Det. Grating Exp.Time
08:18:39.00+31:31:00.10SDSS J081839.00+313100.1ACIS-SNONE6
09:33:48.40+31:33:35.20SDSS J093348.37+313335.2ACIS-SNONE6
11:34:45.80+43:18:58.00SDSS J113445.83+431858.0ACIS-SNONE6
13:46:52.70+39:24:11.80SDSS J134652.72+392411.8ACIS-SNONE6
14:26:10.50+44:11:24.00SDSS J142610.59+441124.0ACIS-SNONE6
16:55:43.20+39:45:19.90SDSS J165543.24+394519.9ACIS-SNONE6

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 11700896

Title: After the Fall: Fading AGN in Post-starburst Galaxies

PI Name: Christy Tremonti

We propose joint Chandra and HST observations of an extraordinary sample of 12 massive post-starburst galaxies at z=0.4-0.8 that are in the short-lived evolution phase a few 100 Myr after the peak of merger-driven star formation and AGN activity. We will use the data to measure X-ray luminosities, black hole masses, and accretion rates; and with the accurate "clocks" provided by post-starburst stellar populations, we will directly test theoretical models that predict a power-law decay in the AGN light curve. We will also test whether star formation and black hole accretion shut down in lock-step, quantify whether the black holes transition to radiatively inefficient accretion states, and constrain the observational signatures of black hole mergers.

R.A. Dec. Target Name Det. Grating Exp.Time
11:04:37.50+59:46:39.60SDSS J110437.46+594639.6ACIS-SNONE8.52
13:59:21.00+51:37:38.90SDSS J135920.99+513738.9ACIS-SNONE8.27
08:26:38.40+43:05:29.50SDSS J082638.41+430529.5ACIS-SNONE9.98
15:06:36.30+54:02:20.90J150636.30+540220.9ACIS-SNONE10.87
16:13:32.50+28:34:14.80SDSS J161332.53+283414.8ACIS-SNONE5
21:40:00.50+12:09:14.60SDSS J214000.49+120914.6ACIS-SNONE11.33
09:44:17.90+09:30:19.40SDSS J094417.85+093019.4ACIS-SNONE6.44
17:13:00.40+28:17:08.20SDSS J171300.39+281708.2ACIS-SNONE5.76
16:34:46.50+46:19:46.70SDSS J163446.49+461946.7ACIS-SNONE5
15:06:03.70+61:31:48.10SDSS J150603.68+613148.1ACIS-SNONE13.39
15:58:11.20+39:57:20.80SDSS J155811.24+395720.8ACIS-SNONE6.17
21:18:24.10+00:17:29.40SDSS J211824.06+001729.4ACIS-SNONE5.69

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800028

Title: Chandra Observations of SZ-selected Galaxy Clusters Detected by the South Pole Telescope

PI Name: Gordon Garmire

We propose a 180 ks program to observe 7 cluster candidates from the South Pole Telescope cluster survey. These clusters have been identified via the Sunayev-Zel'dovich effect (SZ) as S/N>5.5 candidates using the South Pole Telescope. This is part of a combined GO/GTO (in conjunction with the HRC team) program to establish an unbiased, SZ-flux limited sample of ~100 clusters to be observed with Chandra. Chandra observations of clusters detected by the SPT survey will provide an accurate measurement of the high mass end of the mass function, where the sensitivity to the underlying cosmology is largest.

R.A. Dec. Target Name Det. Grating Exp.Time
23:37:25.20-59:42:28.80SPT-CL2337-5942ACIS-INONE20
05:59:41.30-52:49:08.40SPT-CL0600-5249ACIS-INONE20
23:31:50.20-50:51:50.40SPT-CL2332-5052ACIS-INONE20
00:00:59.30-57:48:28.80SPT-CL0001-5749ACIS-INONE20
23:59:40.60-50:09:39.60SPT-CL0000-5010ACIS-INONE20
05:46:36.00-53:45:21.60SPT-CL0547-5345ACIS-INONE60

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800049

Title: X-ray view of a unique relic radio mini-halo in a poor cluster of galaxies

PI Name: Peter Predehl

MRC 0116+111 (z = 0.132) is a poor cluster of galaxies containing one of the most luminous known radio mini-halos. It differs from all other known mini-halos: it shows a double-lobe like diffuse structure surrounding a cD galaxy, but no signs of current AGN activity. Its morphology and integrated radio spectral index indicate that the relic electrons have been re-accelerated. X-ray data of this unusual system are completely lacking. This system presents the best opportunity to study the dynamical evolution of radio jet inated plasma bubbles in the cluster gas when the central AGN becomes inactive. The proposed observation will allow us to detect the system down to a luminosity of 8e40 erg/s. Non-detection will put a lower limit of B = 6.75 uG on the volume averaged magnetic field.

R.A. Dec. Target Name Det. Grating Exp.Time
01:19:01.40+11:23:25.00MRC 0116+111ACIS-SNONE18.5

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800052

Title: Chandra observations of low-z galaxy groups

PI Name: Steve Murray

We propose to observe two objects which will complete a sample of galaxy groups by Sun et al. Chandra data will be used to measure the temperature and metallicity profiles to r=r500, and to derive mass and entropy profiles.

R.A. Dec. Target Name Det. Grating Exp.Time
21:37:51.20-42:51:08.00cl2137−4251ACIS-SNONE25
04:22:28.80-50:09:01.00cl0422−5009ACIS-SNONE15

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800055

Title: CHandra Extended Cluster Cosmology Sample (CHECCS)

PI Name: Steve Murray

We propose to extend the available Chandra observations of well defined galaxy cluster samples for cosmological studies towards higher redshift. The CHandra Extended Cluster Cosmology Sample (CHECCS) comprises the highest flux objects at z>0.8 serendipitously selected from 20 sq. deg. of deep and clean XMM-Newton archival data. The CHECCS follow-up observations will allow a systematic study of galaxy cluster structure and scaling relations at the highest accessible redshifts for Chandra and will provide an increased redshift leverage for cosmological model constraints.

R.A. Dec. Target Name Det. Grating Exp.Time
02:36:05.10-52:25:10.00XMMUJ0236-5225ACIS-INONE40
01:52:41.30-13:38:54.30XMMUJ0152-1338ACIS-INONE40

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800058

Title: A Chandra Study of a Complete Sample of SZE Selected Galaxy Clusters

PI Name: Steve Murray

We propose an investigation of a complete sample of clusters selected through their Sunyaev-Zeldovich signature. These clusters, detected using the South Pole Telescope from an area of several hundred square degrees, represent the first clusters detected from an SZ survey to be observed in X-rays. The Chandra observations will provide cluster mass estimates through the mass proxies including gas temperature, gas mass, and Yx.

R.A. Dec. Target Name Det. Grating Exp.Time
23:41:11.80-51:19:51.60SPT2341-5120ACIS-INONE20
23:42:45.10-54:11:20.40SPT2343-5411ACIS-INONE20
05:51:35.30-57:09:21.60SPT0552-5709ACIS-INONE20
23:43:00.70-55:21:46.80SPT2343-5522ACIS-INONE20
05:09:19.90-53:42:07.20SPT0509-5342ACIS-INONE20
05:33:35.50-50:05:24.00SPT0534-5005ACIS-INONE20
05:28:02.60-52:59:52.80SPT0528-5300ACIS-INONE30

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800074

Title: Chandra Observations of the Merging Clusters A98 and A1750

PI Name: Steve Murray

We propose ACIS observations for two X-ray bright merging clusters with the primary goal being to understand changes in the gas density, temperature, pressure, and entropy distribution of the ICM brought about through major mergers. The two clusters A98 and A1750 are in an early stage of subcluster interaction. For each cluster, we will generate maps of the gas density, temperature, entropy and pressure. We will search for surface brightness edges due to shocks or cold fronts'' and measure their Mach numbers. We will determine the extent of gas mixing. We will compare these results to the ICM properties in relaxed clusters to determine the impact of mergers on the cluster gas.

R.A. Dec. Target Name Det. Grating Exp.Time
00:46:29.30+20:28:05.00A98sACIS-SNONE20
00:46:24.80+20:37:17.00A98nACIS-SNONE20
13:31:08.30-01:40:58.80A1750nACIS-INONE20
13:30:50.30-01:52:28.00A1750sACIS-INONE20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800084

Title: Investigating AGN feedback in cool cores detected in H\alpha

PI Name: Myriam Gitti

Chandra has changed our understanding of the cool cores of galaxy clusters from a relatively simple place where gas is cooling and flowing towards the center to a very dynamic place where heating from the central AGN and cooling, as inferred from active star formation, molecular gas and H\alpha nebulosity, find an uneasy balance. With the aim to get a comprehensive picture of the AGN feedback mechanism, we propose to investigate the X-ray/radio interaction in a compilation of targets selected among the brightest X-ray clusters and the most luminous emitters in H\alpha, which is a promising diagnostic of cool gas in cluster cores. We request joint Chandra and VLA observations of four objects for a total exposure of 287ks and 28h, respectively (44ks and 3h for the top-priority target).

R.A. Dec. Target Name Det. Grating Exp.Time
17:44:14.40+32:59:24.00Zw 1742.1+3306ACIS-SNONE44

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800090

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 7 very X-ray luminous clusters at 0.3
R.A. Dec. Target Name Det. Grating Exp.Time
07:12:20.40+59:32:21.00MACSJ0712.3+5931ACIS-INONE26
21:35:12.10-01:02:56.00MACSJ2135.2-0102ACIS-INONE27
01:50:21.30-10:05:30.00MACSJ0150.3-1005ACIS-INONE27
09:40:53.70+07:44:25.00MACSJ0940.9+0744ACIS-INONE28

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800102

Title: Extending the Deep Image of the Perseus Cluster: The Outer Bubbles, Filaments and Ripples

PI Name: Andrew Fabian

Our existing 900ks image of the core of the Perseus cluster has revealed a wealth of detail on the bubbles, shocks and ripples caused by the action of the central AGN on the surrounding ICM. Most of the advances are directly due to the high surface brightness of the Perseus cluster (higher than any other cluster) and to the high spatial resolution of Chandra. This resolution is degraded significantly 4 arcmin or more off-axis, meaning that the region studied at the highest resolution is quite small. Here we propose three further exposures totalling 700ks to extend the highest resolution region, covering areas to the N and S of the nucleus where the current data suggest the presence of further intriguing and important structures due to the AGN activity.

R.A. Dec. Target Name Det. Grating Exp.Time
03:19:44.20+41:25:18.00Perseus cluster, Abell 426ACIS-INONE300
03:19:39.50+41:36:01.41Perseus cluster, Abell 426ACIS-INONE200

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800193

Title: Testing AGN feedback with AWM7

PI Name: Jeremy Sanders

We aim to test the theory that AGN are responsible for the prevention of significant gas cooling in the cores of galaxy clusters. AWM7 is the only cluster in the bright cluster sample of Dunn & Fabian (2006, 2008) with a short central cooling time no evidence of significant AGN feedback. The cluster is the 5th brightest in the sky from the HIFLUGCS ROSAT cluster sample. By doubling the signal to noise ratio of the existing Chandra observation and with a joint VLA observation, we propose to search for evidence of old or recent AGN feedback in this cluster. We will look for signs of AGN activity by looking for cavities, weak shocks or extended radio emission.

R.A. Dec. Target Name Det. Grating Exp.Time
02:54:27.50+41:34:45.00AWM7ACIS-INONE130

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800194

Title: Testing the Universality of the Gas Mass Fraction in Clusters of Galaxies

PI Name: Laurence David

The independence of the gas mass fraction in clusters of galaxies as a function of redshift is a key assumption in some precision cosmological studies. However, there is very little empirical evidence at the present time to support this claim. A recent study found that the gas mass fraction in a sample of optical selected clusters at intermediate redshifts (0.6 < z < 1.1) is substantially lower than that determined from nearby X-ray selected clusters. We propose a deep Chandra observation of the RCS 2318+0034 cluster, which has a reported gas mass fraction of 1.5%, compared to the average for X-ray selected nearby clusters of about 13%, to more accurately determine the gas mass fraction in this cluster.

R.A. Dec. Target Name Det. Grating Exp.Time
23:18:31.00+00:34:00.40RCS 2318+0034ACIS-INONE150

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800242

Title: MACSJ0358.8-2955: much more distant and exciting than we thought

PI Name: Harald Ebeling

We propose a short observation of MACSJ0358.8-2955, an extremely X-ray luminous cluster at z=0.434 (previously believed to be at z=0.17), to obtain first constraints on the spatial distribution of the gaseous intra-cluster medium in the cluster core. HST/ACS observations show the system to be highly disturbed as evinced by a string of giant elliptical galaxies and multiple gravitational arc systems delineating a very elongated critical line. At Lx=1.8e45 erg/s this system is not only the by far most X-ray luminous cluster known at any redshift that has yet to be observed by Chandra, it is also a prime candidate for a detailed study of cluster dynamics and the segregation of dark and luminous matter. The short observation proposed here will establish whether an in-depth study is warranted.

R.A. Dec. Target Name Det. Grating Exp.Time
03:58:53.00-29:55:35.00MACSJ0358.8-2955ACIS-INONE10

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800319

Title: Massive Galaxy Clusters at High Redshift from the Spitzer SpARCS Survey

PI Name: Erica Ellingson

We propose ACIS-S observations of a sample of four high redshift galaxy clusters with 0.87 < z < 1.34 discovered by the 42 square degree Spitzer Adaptation of the Red Sequence Survey (SpARCS). This survey is currently the largest optical/IR survey for high redshift clusters, and includes significant multi-wavelength follow-up. Extensive Gemini spectroscopic observations have confirmed that all of our targets are rich, massive clusters with velocity dispersions ranging from 650-1000 km/sec. Our Chandra observations are designed to detect the extended intra-cluster medium in the cluster cores, provide rough constraints on core gas densities, and probe the AGN population in these fields.

R.A. Dec. Target Name Det. Grating Exp.Time
16:16:41.00+55:45:26.00EN1-349ACIS-SNONE65
00:35:50.00-43:12:24.00ES1-351ACIS-SNONE65
16:13:14.00+56:49:29.00EN1-240ACIS-SNONE30

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800323

Title: Cosmology with a complete sample of 0.15
PI Name: Massimiliano Bonamente

We propose to re-observe 12 clusters from a complete sample of 35 luminous clusters in the redshift range 0.15
R.A. Dec. Target Name Det. Grating Exp.Time
07:32:17.80+31:37:33.70Abell 586ACIS-INONE10
11:57:22.50+33:39:18.10Abell 1423ACIS-INONE26
13:06:49.70+46:32:59.00Abell 1682ACIS-INONE21
15:39:38.30+34:24:21.00Abell 2111ACIS-INONE21
12:33:52.80+09:49:48.00ZwCl 5247ACIS-INONE21
23:37:39.70+00:17:36.90Abell 2631ACIS-INONE17
04:37:09.80+00:43:37.00RX J0437.1+0043ACIS-INONE32
23:11:26.90+03:35:18.60Abell 2552ACIS-INONE22

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800341

Title: The X-ray Luminous Cluster underlying the z=1.04 blazar PKS 1229-02: Does it have a cool core?

PI Name: Andrew Fabian

We propose a 100ks observation of the radio-loud quasar PKS 1229-02 at z=1.043 in order to study the surrounding diffuse X-ray emission revealed in an 18 ks archival Chandra image. The size and spectrum of the diffuse emission coupled with high Faraday rotation in the radio band strongly point to it being an X-ray luminous cool core cluster of galaxies. Such clusters are rarely found at high redshift, possibly because the central black hole is very active. The proposed data will give valuable information on the origin of the cool core phenomenon, which is central to radio mode AGN feedback.

R.A. Dec. Target Name Det. Grating Exp.Time
12:31:60.00-02:24:05.30PKS 1229-02ACIS-SNONE100

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800350

Title: Completing the cycle of cooling, star formation and AGN heating in Brightest Cluster Galaxies

PI Name: Helen Russell

Recent studies have shown that the energy input from AGN feedback, when averaged over the cluster lifetime, is capable of balancing cooling losses from the cluster gas. Spitzer observations have revealed that 30-50% of BCGs in cool core clusters exhibit star formation suggesting that current AGN heating may not be sufficiently strong to prevent cooling. We propose here to observe objects with low rates of star formation to investigate the transition into a cooling phase and the physical mechanism which triggers the formation of stars in BCGs. Combining X-ray-derived gas cooling times and estimates of AGN 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
23:36:42.40+23:55:06.00Abell 2627ACIS-SNONE45
14:32:37.90+31:38:49.00Abell 1930ACIS-SNONE35
09:24:05.30+14:10:22.00Abell 795ACIS-SNONE30
00:43:52.10+24:24:22.00ZwCl 235ACIS-SNONE20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800376

Title: Chandra Study of the very X-ray Luminous Distant Galaxy Cluster XMMUJ1230+1339 at z = 0.975

PI Name: Hans Boehringer

We propose a deep CHANDRA observation of one of the two most prominent X-ray luminous clusters at redshift around unity, XMMU J1230+1339 (Lx ~ 3 10e44 erg/s in 0.5 to 2.0 keV). The cluster found in our serendipitous XMM-Newton survey is also optically astonishingly rich. The main objective of the observation is to secure precise values of the global cluster parameters which can also be used as mass proxies: X-ray luminosity, temperature, gas mass and the Yx parameter. These properties and a good mass estimate are important for our detailed study of high z cluster galaxy populations, to establish scaling relations of clusters at this redshift, and to contribute to the compilation of a small sample of well characterized clusters at z > 0.8 for cosmological studies.

R.A. Dec. Target Name Det. Grating Exp.Time
12:30:16.90+13:39:04.00XMMUJ1230+1339ACIS-SNONE75

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800387

Title: Heating group gas via the supersonic inflation of radio lobes: a deep Chandra observation of 3C 449

PI Name: Ralph Kraft

We propose a 120 ks Chandra/ACIS-S observation of the hot gas around the canonical FRI radio galaxy 3C 449, which is embedded in a 1.5 keV group. An existing short archival observation shows evidence for a strong shock (Mach number 1.5-2.0) around the inner radio lobes. This is supported by the presence of an entropy spike in the gas (Sun et al. 2009). We will confirm the presence of this shock with the proposed observation, and measure the total energy, age, and time averaged power of the outburst. Confirmation of the presence of this strong shock would be the first such example in a group, and conclusively demonstrate that shock heating plays an important role in the thermodynamic evolution of the group gas.

R.A. Dec. Target Name Det. Grating Exp.Time
22:31:20.90+39:21:48.003C 449ACIS-SNONE120

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800471

Title: Chandra Observations of a Complete Sample of SZE Selected Galaxy Clusters

PI Name: Joseph Mohr

We propose to obtain X-ray observations of a complete sample of 16 SZE selected galaxy clusters from the South Pole Telescope (SPT) survey. The SZE selection produces an approximately mass limited sample (at all redshifts) over the existing 200 deg^2 SPT survey. The Chandra observations provide X-ray mass estimates and morphologies, allowing (1) an initial calibration of the SZE flux-mass relation and (2) early tests of cosmology and the evolution of structure. Our 346ks request leverages 625ks of GTO time in AO10/11; these X-ray data are crucial to developing an understanding of the new window on the universe that SPT has opened and in laying the foundation for future studies using the full SPT survey (~1400deg^2 by 2010).

R.A. Dec. Target Name Det. Grating Exp.Time
23:31:50.20-50:51:50.40SPT-CL 2332-5052ACIS-INONE5.9
05:46:36.00-53:45:21.60SPT-CL 0547-5345ACIS-INONE23.9
00:00:59.30-57:48:28.80SPT-CL 0001-5749ACIS-INONE7.3
23:42:45.10-54:11:20.40SPT-CL 2343-5411ACIS-INONE64.1
23:59:40.60-50:09:39.60SPT-CL 0000-5010ACIS-INONE22.7
05:51:35.30-57:09:21.60SPT-CL 0552-5709ACIS-INONE16.5
23:43:00.70-55:21:46.80SPT-CL 2343-5522ACIS-INONE75
05:09:19.90-53:42:07.20SPT-CL 0509-5342ACIS-INONE5.9
23:55:49.70-50:56:09.60SPT-CL 2356-5056ACIS-INONE11.5
05:28:02.60-52:59:52.80SPT-CL 0528-5300ACIS-INONE38.5
05:33:35.50-50:05:24.00SPT-CL 0534-5005ACIS-INONE75

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800515

Title: Powerful Radio Sources in the Centers of Nearby Clusters

PI Name: Lukasz Stawarz

We propose joint Chandra/XMM observations of two powerful FRII radio galaxies at the centers of the two nearby Abell clusters 1836 and 578. The relevance of the proposed research comes from the fact that, on one hand, heating of clusters by AGN requires large jet powers (appropriate for FRII galaxies), while on the other hand, the majority of the currently studied cases of cD-hosted radio-loud AGN are in fact low-power FR I sources. As the two targets are the only FR II radio galaxies known at the centers of local (z<0.25) Abell clusters, the proposed observations will enable us for investigating the role of powerful jets in cluster heating, by constraining the source energetics and resolving various X-ray features within and outside the radio structures embedded in the clusters.

R.A. Dec. Target Name Det. Grating Exp.Time
07:24:54.10+66:59:10.40Abell 0578ACIS-SNONE40
14:01:41.90-11:36:25.10Abell 1836ACIS-INONE60

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800517

Title: Strong shocks, cavities and AGN heating in galaxy groups

PI Name: Ming Sun

Outbursts of SMBHs have significant impact on structure formation and evolution. Their imprint on ICM (e.g., shocks, cavities, elevated entropy) provides an historical chronicle of the SMBH activity. However, AGN heating has not been well studied in groups (especially for groups hosting strong radio AGN), although it should affect the group gas much more than the cluster gas. We propose deep observations of two groups with strong radio AGN. Both have promising candidates of strong shocks from the existing short observations, which also reveals a cavity with little radio emission. The results may yield the first strong shock detection in groups and also fill the unexplored regime of the L_{radio} - L_{jet power} plane for groups. Joint VLA observations for one groups are also requested.

R.A. Dec. Target Name Det. Grating Exp.Time
03:27:53.60+02:33:41.003C88ACIS-SNONE109

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800539

Title: Black Hole Masses and the Merger of High Velocity Dispersion Galaxy NGC6861 with NGC6868 in the AS0851 Galaxy Group

PI Name: Marie Machacek

We propose to probe the connection between the shape of the high mass end of the black hole scaling relations and galaxy interactions, AGN feedback, and black hole growth using ACIS-I X-ray observations of the merger of high velocity dispersion galaxy NGC6861 with NGC6868 in the AS0851 galaxy group. We will measure the temperature rise in the inner 300 pc of NGC6861 to investigate the mass of its central black hole and test the black hole mass - velocity dispersion correlation. We will measure temperatures and densities across cold fronts, shocks, tails and cavities to constrain the orbital parameters, dynamical forces and AGN feedback in the merger of NGC681 with NGC6868 to resolve the order of magnitude discrepancy between the black hole scaling relations for NGC6861.

R.A. Dec. Target Name Det. Grating Exp.Time
20:07:19.50-48:22:13.00NGC6861ACIS-INONE100
20:09:54.10-48:22:46.00NGC6868ACIS-INONE75

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800560

Title: MACS1354+77: A new bullet' cluster?

PI Name: Dan Maoz

The "bullet cluster", consisting of two galaxy clusters shortly after collision, has been an invaluable laboratory for physics on many scales: cosmological structure formation, merger evolution, dark matter physics, and shock hydrodynamics. Additional such systems, with different parameters (time post-collision, component mass ratios, collision and shock velocities, line-of-sight orientations) are needed. We have found a new candidate system of this kind at z=0.4, with multiple strong-lensing features that permit accurate modeling of the two, roughly equal, mass distributions. A brief exploratory Chandra observation will reveal if this object is another bullet-type case. Based on previous examples of merging clusters, this initial experiment will already enable a wealth of science.

R.A. Dec. Target Name Det. Grating Exp.Time
13:54:30.60+77:15:20.90MACSJ1354.6+7715ACIS-INONE33

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800640

Title: The Chandra View of the Largest Quasar Lens SDSS J1029+2623

PI Name: Masamune Oguri

We propose to observe SDSS J1029+2623, a rare lens system that consists of three z=2.197 quasar images and a massive lensing cluster at z=0.6. The maximum image separation of 22.5 arcsec makes it the largest lens among the 100 known lensed quasars. We will use 60 ksec ACIS-S observation to study this strong-lens selected cluster, by comparing its X-ray properties with independent strong and weak lensing constraints. The Chandra observation will also be useful to understand the anomalous flux ratios of the quasar images observed in optical. In particular, the X-ray spectrum of the faintest quasar image should be crucial to distinguish whether the anomaly is caused by microlensing or dust extinction.

R.A. Dec. Target Name Det. Grating Exp.Time
10:29:13.30+26:23:32.80SDSS J1029+2623ACIS-SNONE60

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800671

Title: Chandra Observations of Two Unusual Lensing Groups of Galaxies

PI Name: Jimmy Irwin

We propose Chandra observations of two unusual strong gravitational lenses found by the CASSOWARY gravitational lens survey. Both lenses appear to be high mass concentration groups/galaxies with extreme properties. The Cheshire Cat Lens is caused by what could be to be merging fossil groups at a redshift of 0.43. The implied projected mass within the 62 kpc Einstein Ring encloses a staggering 5e13 solar masses. The Cosmic Horseshoe Lens has a nearly perfectly circular Einstein Ring centered on a z=0.44 giant elliptical galaxy which could conceivably be one of the most massive galaxies in the Universe. Our observations will determine the temperature, density, and masses of these systems to reveal the nature of the objects responsible for these most unusual strong lenses.

R.A. Dec. Target Name Det. Grating Exp.Time
10:38:47.90+48:49:17.90Cheshire Cat LensACIS-SNONE70

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800700

Title: The Strongest Cool Core Cluster in the REXCESS X-ray Cluster Sample

PI Name: Megan Donahue

We propose to obtain high-resolution imaging of the most extreme cool core cluster in the REXCESS sample: RXJ2014.8-2430. REXCESS is a representative z~0.1 sample of 31 clusters spanning a wide range in luminosity, mass, and temperature. It was designed to avoid bias in X-ray morphology or central surface brightness. Nearly a million seconds of XMM time has been invested to measure the X-ray properties of these clusters, and they have extensive ground-based radio and optical observations. The unique radio, UV, and optical emission-line properties of RXJ2014 among the REXCESS clusters makes it the highest-priority REXCESS target for Chandra. Because of its high central brightness, a relatively short exposure will allow the study any AGN bubbles, shocks, and multi-phase gas in its core.

R.A. Dec. Target Name Det. Grating Exp.Time
20:14:51.70-24:30:22.90RXJ2014.8-2430ACIS-SNONE20

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800709

Title: Study of the interaction between the puzzling AGN and the hot gas in the cooling core of Sersic 159-03

PI Name: Norbert Werner

We propose a deep (100 ks) observation of the nearby, X-ray bright, cooling core cluster Sersic 159-03 (A S1101) which shows a broad multi-temperature structure indicating a strong interaction between the hot gas and the active galactic nucleus (AGN). Recent GMRT observations indicate the possible presence of two pairs of orthogonal radio jets. These features may be caused by a sudden change of the spin axis of the supermassive black hole or, alternatively, two different radio loud AGN may reside in the nucleus of the cD galaxy, possibly forming a gravitationally bound binary. Chandra will allow us to study in detail the interaction between the radio jets and the hot plasma, the energetics of the feedback, and discriminate on the twin AGN model for the core of the cD galaxy.

R.A. Dec. Target Name Det. Grating Exp.Time
23:13:58.50-42:43:39.00Sersic 159-03 (A S1101)ACIS-INONE100

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800792

Title: Anatomy of a merger: the curious case of MACS J0417.5-1154

PI Name: Anja von der Linden

MACS J0417.5-1154 is a remarkable merger of a very massive cluster and a smaller subcluster. A previous 11 ksec Chandra exposure shows the hot gas distribution to appear distinctly comet-like: the peak is centered on the cD galaxy of the main cluster; the tail, however, extends several hundred kpc and encompasses a pair of giant ellipticals. Optical imaging reveals a bridge of intra-cluster light between the three galaxies, strengthening the hypothesis that this is a merger system with a low impact parameter, seen after pericentric passage. The proposed 80 ksec Chandra observation will allow us to map the detailed thermodynamic state of the system, to study how the merging process affects the cluster cores, and investigate the origin and state of the stripped gas in the tail.

R.A. Dec. Target Name Det. Grating Exp.Time
04:17:34.30-11:54:26.60J0417.5-1154ACIS-INONE80

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 11800852

Title: The X-Ray, SZ, and Optical Scaling Relations of Massive Galaxy Clusters

PI Name: Eli Rykoff

A multi-wavelength approach to cluster cosmology is necessary to overcome systematic uncertainties in the relation between cluster mass and observable mass tracers. We propose short observations of 12 of the 25 richest optical clusters in the redshift range 0.2
R.A. Dec. Target Name Det. Grating Exp.Time
11:36:13.00+40:02:35.80A1319ACIS-SNONE10
12:33:53.00+15:11:40.70SDSS J1233+1511ACIS-INONE13
12:01:16.80+23:06:32.70SDSS J1201+2306ACIS-SNONE7
12:49:32.40+49:53:43.80A1622ACIS-INONE13
14:44:31.80+31:13:36.00A1961ACIS-SNONE7
01:04:55.40+00:03:36.30SDSS J0104+0003ACIS-INONE15
12:29:02.50+47:37:20.50A1550ACIS-SNONE7
09:28:04.50+20:31:45.20A801ACIS-SNONE7
09:22:07.70+03:45:58.80SDSS J0922+0345ACIS-INONE10
23:41:17.00-09:01:11.80A2645ACIS-SNONE5
11:23:58.80+21:28:49.70A1246ACIS-INONE5
13:27:01.00+02:12:19.50RXC J1327+0211ACIS-INONE7

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11900125

Title: A survey of dark gamma-ray burst hosts

PI Name: Andrew Levan

A fraction of gamma-ray bursts (GRBs) are dark in the optical, often suggesting suppression relative to the X-ray flux. These bursts may originate in highly obscured environments, different from those of the optically bright GRBs. We propose to continue our earlier program by conducting a set of modest ToO observations of these GRBs. Chandra observations will provide precise burst positions (~0.5") and, unlike Swift-XRT observations will enable the unambiguous location of the host galaxy. Subsequent HST imaging will provide broadband magnitudes, colours and morphologies. Our early results suggest that dark bursts hosts can be markedly different from those of the bright population, and motivates the need to gather a larger sample to accurately constrain their properties.

R.A. Dec. Target Name Det. Grating Exp.Time
Dark-GRB1ACIS-SNONE15
Dark-GRB2ACIS-SNONE15
Dark-GRB3ACIS-SNONE15

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11900514

Title: COMBH: Chandra Observations of M-sigma Black Holes

PI Name: Kayhan Gultekin

Galaxies with dynamically-measured central BH masses allow us to understand BH accretion, jets, and interactions between BHs and host galaxies with a clarity not possible in random surveys. By measuring true Eddington fractions, we can calculate the energy in radiation vs mechanical jet energy and the efficacy of BHs in heating nuclear regions and affecting star formation. Remarkably, 1/3 of SMBHs making up the M-sigma relation have been poorly observed or totally unobserved with Chandra. We propose a survey of 15 M-sigma galaxies to complete the sample of reliable M-sigma SMBHs. For each galaxy we propose to obtain 30-60 ks exposures and an hour-long VLA observation. This survey will test and extend the fundamental plane of BH activity and facilitate studies of the origin of M-sigma.

R.A. Dec. Target Name Det. Grating Exp.Time
03:19:41.10-19:24:40.90NGC1300ACIS-SNONE30
09:13:43.00+76:28:31.20NGC 2748ACIS-SNONE30
09:12:24.40+35:01:39.10NGC2778ACIS-SNONE30
12:20:17.80+75:22:15.20NGC4291ACIS-SNONE30
12:51:48.00-10:27:17.00NGC4742ACIS-SNONE30
13:19:31.70-12:39:25.10NGC5077ACIS-SNONE30
14:21:03.70+03:16:15.60NGC5576ACIS-SNONE30
10:48:16.90+12:37:45.40NGC3384ACIS-SNONE30
12:30:57.70+12:16:13.30NGC4486AACIS-SNONE30
12:28:60.00+13:58:42.80NGC4459ACIS-SNONE30
12:39:55.90+10:10:33.90NGC4596ACIS-SNONE30
23:00:59.90+30:08:41.60NGC7457ACIS-SNONE30

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11900760

Title: Identifying Unidentified Fermi-LAT Objects (UFOs) at High-Latitude

PI Name: Chi (Teddy) Cheung

We propose a Chandra study of 8 high Galactic latitude gamma-ray sources in the Fermi-LAT bright source list. These sources are currently unidentified, i.e., they are not clearly associated with established classes of gamma-ray emitters like blazars and pulsars. The proposed observations will determine the basic properties (fluxes, positions, hardness ratio/spectra) of all X-ray sources down to a 0.3-10 keV flux limit of 1.5e-14 erg/cm2/s within the Fermi-LAT localization circles. This will enable further follow-up at other wavelengths, with the ultimate goal to reveal the nature of these enigmatic gamma-ray sources.

R.A. Dec. Target Name Det. Grating Exp.Time
16:53:40.80-01:59:49.20J1653.4-0200ACIS-INONE20
22:14:42.00+30:02:45.60J2214.8+3002ACIS-INONE20
22:41:53.80-52:37:04.80J2241.7-5239ACIS-INONE20
13:11:49.70-34:28:37.20J1311.9-3419ACIS-INONE20
23:39:37.20-05:33:18.00J2339.8-0530ACIS-INONE20

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11910040

Title: GTO ChIcAGO: Chandra Identification of ASCA Galactic Objects

PI Name: Steve Murray

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
14:57:33.00-59:01:18.00AX J145732-5901ACIS-SNONE10
15:10:06.00-58:24:54.00AX J151005-5824ACIS-SNONE10
16:59:05.70-42:07:27.20AX J165901-4208ACIS-SNONE10
18:24:38.10-13:10:47.00AX J182435-1311ACIS-SNONE10
18:33:56.40-08:22:18.60AX J183356-0822ACIS-SNONE10

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11910605

Title: X-Ray Counterparts to Radio Transients

PI Name: Geoffrey Bower

The radio transient sky is poorly known. We have recently conducted the most sensitive survey for radio transients (RTs) that has discovered 10 RTs, which have a duration of less than one week, a flaring amplitude of greater than 100, and no identification in deep radio and optical images. These RTs have no clear association with known phenomena. Possible X-ray counterparts to the RTs include isolated neutron stars, active stars, and optically-obscured AGN. An origin with any of these source classes requires a new understanding of event rates and luminosity functions. We propose Chandra ACIS-I observations of this field. Discovery of X-ray counterparts will have a significant impact on our understanding of the processes at work and possibly identify a new source class.

R.A. Dec. Target Name Det. Grating Exp.Time
15:02:20.50+78:16:14.90CAMPBEACIS-INONE50

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11910648

Title: Probing Galactic Feedback with X-ray Binaries

PI Name: Taotao Fang

Recent X-ray observations of the Galactic X-ray binaries revealed a number of narrow absorption lines produced by metals in the hot gas; however, it is unclear whether this hot gas is intrinsic to the source, or in the hot interstellar medium, and the answer to this question has fundamental implication in probing Galactic feedback processes. We propose one ToO observation to study X-ray bright sources spatially close to these X-ray binaries. We expect that the hot gas would produce similar absorption if it is ISM in origin. Due to the different intrinsic properties and environment of these X-ray binaries, our observations will offer a clean test of the nature of the hot gas.

R.A. Dec. Target Name Det. Grating Exp.Time
18:35:44.10-32:59:29.00XB 1832-330ACIS-SLETG100
17:08:54.40-32:18:57.504U 1705-32ACIS-SLETG100

Subject Category: GALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 11910849

Title: Sgr B2 ten year later: on the nature of the hard X-rays from the CMZ

PI Name: Regis Terrier

The origin of the GC molecular clouds 6.4 keV emission has long been a matter of controversy: irradiation by cosmic ray electrons or by X-rays emitted by a flaring source. An interesting candidate in the latter case is a possible 300 yr old flare of Sgr A* of 6 order of magnitude above its current quiescent level. Using 6 years of monitoring of the GC we show a lightcurve of Sgr B2 revealing a significant decrease of the hard X-ray flux with a 20-year timescale, favoring the second scenario. We propose a deep Chandra exposure of Sgr B2 to search for the morphological changes in the cloud emission compared with a similar exposure taken in March 2000. This variations pattern is a key element to finally settle the controversy and understand the actual origin of the likely irradiating source.

R.A. Dec. Target Name Det. Grating Exp.Time
17:47:24.30-28:24:37.10Sgr B2ACIS-INONE100