Accepted Cycle 3 Large Projects

Proposal Number	Subject Category	PI Name	Type	Time (Ks)	Title
03400837	BH AND NS BINARIES	Grindlay	LP	296	COMPLETE COMPACT OBJECT AND BINARY SURVEY OF 47TUC
03500538	SN, SNR AND ISOLATED NS	Kulkarni	LP	250	A CHANDRA SURVEY FOR COMPACT OBJECTS IN SUPERNOVA REMNANTS
03600940	NORMAL GALAXIES	Baganoff	LP	518.5	MONITORING THE EXTREME X-RAY FLARING OF SAGITTARIUS A* AND A DEEP SURVEY OF THE CENTRAL 40 PC OF THE GALAXY
03700413	ACTIVE GALAXIES AND QUASARS	Fabbiano	LP	375	AN IN-DEPTH STUDY OF THE X-RAY SOURCE POPULATION AND HOT ISM OF THE ANTENNAE GALAXIES
03700438	ACTIVE GALAXIES AND QUASARS	Kaastra	LP	520	RESOLVING THE WARM ABSORBER IN NGC 5548
03800272	CLUSTERS OF GALAXIES	Ebeling	LP	527	MACS: THE X-RAY PROPERTIES OF THE MOST MASSIVE GALAXY CLUSTERS AT Z>0.3
03900164	EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS	Brandt	LP	1000.5	THE CHANDRA SURVEY OF THE HUBBLE DEEP FIELD NORTH AREA: A PUBLIC RESOURCE FOR THE PRESENT AND FUTURE OF X-RAY ASTRONOMY

Subject Category: BH AND NS BINARIES

Proposal Number: 03400837

Title: COMPLETE COMPACT OBJECT AND BINARY SURVEY OF 47TUC

PI Name: Johnathan Grindlay

Our cycle 1 observation of 47Tuc has shown its promise as the ultimate laboratory for study of the production and evolution of compact binaries and compact objects in globular clusters. We propose a deep (4 x 75ksec) ACIS-S observation to measure the complete populations of millisecond pulsars (MSPs) and cataclysmic variables (CVs) by their variability and spectra and to constrain the main sequence binary population. Coordinated HST (ACS) data would provide unique identifications of CVs and many MSPs and allow the full population of quiescent low mass x-ray binaries to be distinguished from CVs. This dataset would provide fundamental constraints for the origins of neutron stars, millisecond pulsars, magnetic white dwarfs and compact binaries in globular clusters.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
00:24:05.80	-72:04:51.20	47 TUCANAE	ACIS-S	NONE	300

Subject Category: SN, SNR AND ISOLATED NS

Proposal Number: 03500538

Title: A CHANDRA SURVEY FOR COMPACT OBJECTS IN SUPERNOVA REMNANTS

PI Name: Shrinivas Kulkarni

It has become increasingly clear that the natal properties of young neutron stars exhibit a rich diversity --- dramatically illustrated by the enigmatic central object in Cas A and hinted at by early 3D modeling of core-collapse. We propose a survey of an objectively constructed sample of nearby SNRs which, when combined with archival data and our vigorous multi-wavelength observation program, will give us a reliable view of the true variety of neutron stars. The ensuing statistics and studies of the central objects will advance our understanding of core-collapse and have bearing on related topics (supernova energetics, natal kicks, etc). We believe that this comprehensive effort, a census of such objects within 5 kpc, will be one of the enduring legacies of the Chandra mission.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
01:28:32.00	+63:06:34.00	G127.1+0.5	ACIS-I	NONE	20
14:42:50.00	-62:28:20.00	G315.4-2.3	ACIS-I	NONE	10
19:38:24.00	+17:17:32.00	G053.6-2.2	ACIS-I	NONE	35
23:59:17.00	+62:26:53.00	G116.9+0.2	ACIS-I	NONE	50
19:33:20.00	+18:58:44.00	G054.4-0.3	ACIS-I	NONE	25
20:52:14.00	+55:20:30.00	G093.3+6.9	ACIS-I	NONE	15
13:50:30.00	-62:06:13.00	G309.8+0.0	ACIS-I	NONE	40
20:53:22.00	+42:27:18.00	G084.2-0.8	ACIS-I	NONE	25
05:26:49.00	+42:57:19.00	G166.0+4.2	ACIS-I	NONE	30

Subject Category: NORMAL GALAXIES

Proposal Number: 03600940

Title: MONITORING THE EXTREME X-RAY FLARING OF SAGITTARIUS A* AND A DEEP SURVEY OF THE CENTRAL 40 PC OF THE GALAXY

PI Name: Frederick Baganoff

In Cycle 1, we discovered the first clear evidence of X-ray emission from Sgr A*, the compact radio source associated with the massive black hole (MBH) at the dynamical center of the Milky Way. In Cycle 2, we made the first detection of rapid, large-amplitude X-ray variability of Sgr A*. To gather unprecedented information about the immediate environment of an MBH, we propose a 510-ks ACIS-I observation of Sgr A* to measure the quiescent-state emission spectrum and to characterize the timescales, duty cycle, energetics, and spectral evolution of the flares. Simultaneous monitoring with OVRO and VLBA are being proposed to search for correlated variations and lags predicted by theory to characterize the flaring state emission process. We will also obtain a deep survey in this rich field.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
17:45:40.00	-29:00:28.00	SGR A*	ACIS-I	NONE	510

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 03700413

Title: AN IN-DEPTH STUDY OF THE X-RAY SOURCE POPULATION AND HOT ISM OF THE ANTENNAE GALAXIES

PI Name: Giuseppina Fabbiano

We propose a deep 375~ks observation of the prototypical merger galaxies NGC~4038/39 (``The Antennae''), divided into 5 time segments. Together with the archival data, we will obtain a deep 450ks ACIS-S exposure and time monitoring over 3 yrs. The unique significance of the Antennae for our understanding of mergers and the extraordinary characteristics of the X-ray emission of this system, make this study essential for probing a wide range of fundamental questions on the properties and evolution of XRBs, the range of black hole masses implied by the rich ULX population, the properties of the multiphase ISM, and the evolution of galaxy mergers, that cannot be addressed by looking at more normal galaxies.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
12:01:53.70	-18:52:35.50	NGC 4038/NGC 4039	ACIS-S	NONE	375

Subject Category: ACTIVE GALAXIES AND QUASARS

Proposal Number: 03700438

Title: RESOLVING THE WARM ABSORBER IN NGC 5548

PI Name: Jelle Kaastra

We propose to map the ionization and velocity structure of the X-ray and UV absorbers in NGC 5548 with the LETGS and HETGS of Chandra and STIS/HST. NGC 5548 is an important target for this kind of study because 1) it shows multiple kinematic components in the UV characterized by a range in ionization parameter and effective column, 2) it shows evidence for multiple kinematic and ionization components in previous Chandra X-ray spectra, and 3) it has a low Galactic column, which permits coverage of spectral lines out to 80 Angstrom with the LETGS. These data yield the ionization parameter and column density of the absorption-line regions as a function of radial velocity, and constrain the elemental abundances and shape of the unobserved EUV continuum.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
14:17:59.60	+25:08:12.40	NGC 5548	HRC-S	LETG	350
14:17:59.60	+25:08:12.40	NGC 5548	ACIS-S	HETG	170

Subject Category: CLUSTERS OF GALAXIES

Proposal Number: 03800272

Title: MACS: THE X-RAY PROPERTIES OF THE MOST MASSIVE GALAXY CLUSTERS AT Z>0.3

PI Name: Harald Ebeling

We propose ACIS-I and HST observations of 30 distant and very X-ray luminous clusters (z>0.3, Lx>1e45) detected in the MAssive Cluster Survey (MACS). 22 of these 30 are new discoveries. Our targets are the high-z counterparts of the best-studied local systems and, combined with 4 others scheduled for observation, form a statistical sample >10 times larger than any previous one in this redshift and luminosity range. Chandra's unique capabilities will allow us to obtain spatially resolved gas temperature and density maps to constrain both the cosmological and physical parameters governing the evolution of the most massive clusters at z<0.5. The proposed observations are complemented by extensive groundbased follow-up studies of weak gravitational lensing, galaxy dynamics and the SZ effect.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
04:17:33.70	-11:54:12.00	MACSJ0417.5-1154	ACIS-I	NONE	12
02:42:35.90	-21:32:15.00	MACSJ0242.5-2132	ACIS-I	NONE	12
19:31:50.10	-26:34:36.50	MACSJ1931.8-2634	ACIS-I	NONE	14
23:11:35.20	+03:38:24.50	MACSJ2311.5+0338	ACIS-I	NONE	14
00:47:20.90	-08:10:30.50	MACSJ0047.3-0810	ACIS-I	NONE	14
11:31:53.70	-19:55:43.50	MACSJ1131.8-1955	ACIS-I	NONE	15
09:49:53.80	+17:08:03.00	MACSJ0949.8+1708	ACIS-I	NONE	15
11:15:53.30	+01:29:47.00	MACSJ1115.8+0129	ACIS-I	NONE	16
22:45:05.20	+26:37:58.00	MACSJ2245.0+2637	ACIS-I	NONE	17
14:27:40.60	-25:21:06.00	MACSJ1427.6-2521	ACIS-I	NONE	17
22:11:44.60	-03:49:47.00	MACSJ2211.7-0349	ACIS-I	NONE	18
22:29:44.50	-27:55:38.50	MACSJ2229.7-2755	ACIS-I	NONE	17
01:52:35.50	-28:52:47.00	MACSJ0152.5-2852	ACIS-I	NONE	18
05:20:42.40	-13:28:55.00	MACSJ0520.7-1328	ACIS-I	NONE	20
01:59:49.90	-08:49:49.00	MACSJ0159.8-0849	ACIS-I	NONE	18
17:31:40.10	+22:52:39.00	MACSJ1731.6+2252	ACIS-I	NONE	21
13:19:59.60	+70:03:34.50	MACSJ1319.9+7003	ACIS-I	NONE	20
02:57:42.00	-22:09:01.50	MACSJ0257.6-2209	ACIS-I	NONE	20
04:04:38.50	+11:09:21.00	MACSJ0404.6+1109	ACIS-I	NONE	24
22:28:34.40	+20:36:47.00	MACSJ2228.5+2036	ACIS-I	NONE	21
17:20:15.50	+35:36:22.00	MACSJ1720.2+3536	ACIS-I	NONE	21
05:47:02.20	-39:04:25.00	MACSJ0547.0-3904	ACIS-I	NONE	22
03:08:55.40	+26:45:39.00	MACSJ0308.9+2645	ACIS-I	NONE	25
04:29:36.00	-02:53:01.50	MACSJ0429.6-0253	ACIS-I	NONE	24
00:35:26.80	-20:15:37.50	MACSJ0035.4-2015	ACIS-I	NONE	22
00:11:43.00	-15:23:12.00	MACSJ0011.7-1523	ACIS-I	NONE	22
20:49:55.90	-32:17:10.50	MACSJ2049.9-3217	ACIS-I	NONE	24
12:06:13.00	-08:47:43.00	MACSJ1206.2-0847	ACIS-I	NONE	24

Subject Category: EXTRAGALACTIC DIFFUSE EMISSION AND SURVEYS

Proposal Number: 03900164

Title: THE CHANDRA SURVEY OF THE HUBBLE DEEP FIELD NORTH AREA: A PUBLIC RESOURCE FOR THE PRESENT AND FUTURE OF X-RAY ASTRONOMY

PI Name: William Brandt

We propose to extend the Chandra deep survey of the HDF-N and its vicinity. The ultimate goal is to obtain 5 Ms of coverage over the next 5 years; currently we have 1 Ms coverage. Here we propose two public 500 ks observations. This project will fulfill one of Chandra's central design goals and will be a long-lasting legacy of Chandra, laying the groundwork for the next generation of X-ray observatories. We should remain nearly photon limited for point-sources near the aim point. We will study obscured and high-redshift AGN, starbursts, normal galaxies, clusters, groups, and diffuse X-ray emission. The HDF-N field is the ideal region for multiwavelength follow-up studies due to the enormous database already in place. Our ACIS team expertise will be extensively utilized.

R.A.	Dec.	Target Name	Det.	Grating	Exp.Time
12:36:49.40	+62:12:58.00	HDF-N	ACIS-I	NONE	1000

The Chandra X-Ray Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA. Email: cxchelp@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2024. All rights reserved.