2002ApJS..142..239Z

Query : 2002ApJS..142..239Z

2002ApJS..142..239Z - Astrophys. J., Suppl. Ser., 142, 239-260 (2002/October-0)

Chandra observations of "The Antennae" galaxies (NGC 4038/4039). II. Detection and analysis of galaxian X-ray sources.

ZEZAS A., FABBIANO G., ROTS A.H. and MURRAY S.S.

Abstract (from CDS):

We report the detailed analysis of the X-ray properties of the discrete sources detected in a long (72 ks) Chandra ACIS-S observation of the Antennae galaxies. We detect 49 sources, down to a detection limit of ∼1038 ergs.s–1; 18 sources have LX>1039 ergs.s–1 (ultraluminous X-ray sources; ULXs). Six of the 49 sources have an extended component. Two sources show evidence for variability during this observation, and three sources exhibit long-term variability in timescales of a few years. The spectra of the discrete sources are diverse, suggesting different emission mechanisms, broadly correlated with the source luminosity: the most luminous sources exhibit harder emission, while the spectra of fainter sources appear softer. Spectra and variability suggest that the ULXs may be binary accretion sources; Supernova remnants or hot interstellar medium in the Chandra beam may be responsible for some of the softer sources.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Individual: NGC Number: NGC 4038/4039 - Galaxies: Interactions - Galaxies: Peculiar - X-Rays: Galaxies

Nomenclature: Table 1, col(1): [ZFR2002] NN (Nos 1-49), [ZFR2002] Nc (Nos 1c-3c) = Table 1, col(2): CXOAnt JHHMMSS.s+DDMMSS.s N=52.

Simbad objects: 55

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Number of rows : 55
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [ZFR2002] 1 HXB 12 01 48.47 -18 52 07.5           ~ 4 0
2 [ZFR2002] 2 HXB 12 01 48.83 -18 54 03.6           ~ 5 0
3 CXOU J120150.1-185424 HXB 12 01 50.19 -18 54 25.7           ~ 5 0
4 [ZFR2002] 4 HXB 12 01 50.38 -18 52 34.5           ~ 5 0
5 CXOAnt J120150.5-185215.8 X 12 01 50.47 -18 52 15.9           ~ 5 0
6 [ZFR2002] 6 HXB 12 01 50.51 -18 52 04.8           ~ 8 0
7 CXOAnt J120150.6-185220.3 X 12 01 50.64 -18 52 20.3           ~ 4 0
8 [ZFR2002] 8 HXB 12 01 50.97 -18 54 02.0           ~ 4 0
9 [ZFR2002] 9 HXB 12 01 51.01 -18 51 55.4           ~ 3 0
10 CXOAnt J120151.3-185146.6 X 12 01 51.27 -18 51 46.6           ~ 5 0
11 [ZFB2006] 27 HXB 12 01 51.3185981616 -18 52 24.892127760           ~ 24 1
12 [ZFR2002] 12 HXB 12 01 51.54 -18 53 51.2           ~ 4 0
13 [ZFR2002] 13 HXB 12 01 51.62 -18 52 31.9           ~ 14 0
14 [ZFR2002] 14 HXB 12 01 51.76 -18 53 48.4           ~ 4 0
15 [ZFR2002] 15 HXB 12 01 51.98 -18 52 26.5           ~ 5 0
16 [PCV2006] ULX 22 HXB 12 01 52.09 -18 51 33.6           ~ 20 1
17 CXOAnt J120152.1-185152.0 X 12 01 52.15 -18 51 52.0           ~ 3 0
18 [ZFR2002] 18 HXB 12 01 52.39 -18 52 06.8           ~ 7 0
19 [ZFR2002] 19 HXB 12 01 52.42 -18 53 14.2           ~ 8 0
20 [ZFR2002] 20 HXB 12 01 52.70 -18 51 30.0           ~ 10 0
21 [CHP2004] J120152.9-185251 X 12 01 52.87 -18 52 51.5           ~ 3 0
22 [ZFR2002] 22 HXB 12 01 52.89 -18 52 10.0           ~ 4 0
23 [ZFR2002] 23 HXB 12 01 52.90 -18 53 19.4           ~ 7 0
24 [CHP2004] J120153.0-185204 HXB 12 01 52.90 -18 52 03.2           ~ 13 0
25 [CHP2004] J120153.0-185210 HXB 12 01 53.00 -18 52 09.6           ~ 7 0
26 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
27 [ZFR2002] 26 HXB 12 01 53.13 -18 52 05.5           ~ 5 0
28 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
29 CXOAnt J120153.4-185154.8 X 12 01 53.44 -18 51 54.8           ~ 3 0
30 CXOAnt J120153.5-185233.3 X 12 01 53.46 -18 52 33.3           ~ 2 0
31 [SGT2004] J120153.50-185310.7 X 12 01 53.49 -18 53 11.1           ~ 10 0
32 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
33 CXOAnt J120153.6-185211.8 X 12 01 53.59 -18 52 11.8           ~ 1 0
34 [ZFR2002] 1c HXB 12 01 53.86 -18 53 16.3           ~ 2 0
35 [PCV2006] ULX 23 HXB 12 01 54.27 -18 52 01.9           ~ 9 1
36 [PCV2006] ULX 24 HXB 12 01 54.35 -18 52 10.3           ~ 9 1
37 CXOAnt J120154.5-185312.3 X 12 01 54.46 -18 53 12.3           ~ 1 0
38 [ZFR2002] 34 HXB 12 01 54.50 -18 53 03.7           ~ 10 0
39 [ZFR2002] 33 HXB 12 01 54.5110200864 -18 53 05.829182808           ~ 11 0
40 [ZFR2002] 35 HXB 12 01 54.77 -18 52 52.4           ~ 10 0
41 [ZFR2002] 36 HXB 12 01 54.80 -18 52 15.1           ~ 8 0
42 2MASS J12015494-1853057 HXB 12 01 54.94 -18 53 05.8           ~ 2 0
43 CXOAnt J120154.9-185315.1 Sy1 12 01 54.9784738176 -18 53 14.431945056           ~ 16 0
44 [ZFR2002] 38 HXB 12 01 55.14 -18 51 44.1           ~ 5 0
45 CXOAnt J120155.1-185247.5 HXB 12 01 55.18 -18 52 47.5           ~ 6 0
46 CXOAnt J120155.4-185250.5 X 12 01 55.38 -18 52 50.5           ~ 4 0
47 CXOAnt J120155.5-185235.9 HXB 12 01 55.48 -18 52 35.9           ~ 6 0
48 [PCV2006] ULX 26 HXB 12 01 55.60 -18 52 15.0           ~ 19 1
49 CXOU J120155.7-185231 HXB 12 01 55.71 -18 52 32.2           ~ 5 0
50 [PCV2006] ULX 27 HXB 12 01 56.43 -18 51 57.8           ~ 17 1
51 CXOAnt J120156.5-185228.5 X 12 01 56.47 -18 52 28.5           ~ 2 0
52 CXOAnt J120156.6-185200.9 HXB 12 01 56.64 -18 52 00.9           ~ 5 0
53 [ZFR2002] 47 HXB 12 01 56.73 -18 54 01.2           ~ 4 0
54 CXOAnt J120156.9-185202.3 X 12 01 56.99 -18 52 02.8           ~ 2 0
55 [PCV2006] ULX 28 HXB 12 01 58.22 -18 52 04.5           ~ 7 1

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