2007ApJS..173...70G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST06:39:00

2007ApJS..173...70G - Astrophys. J., Suppl. Ser., 173, 70-84 (2007/November-0)

The X-ray binary population in M 33. II. X-ray spectra and variability.

GRIMM H.-J., McDOWELL J., ZEZAS A., KIM D.-W. and FABBIANO G.

Abstract (from CDS):

In this paper we investigate the X-ray spectra and X-ray spectral variability of compact X-ray sources for 3 Chandra observations of the Local Group galaxy M33. The observations are centered on the nucleus and the star-forming region NGC 604. In the observations, 261 sources have been detected. For a total of 43 sources the number of net counts is above 100, sufficient for a more detailed spectral fitting. Of these sources, 25 have been observed in more than one observation, allowing the study of spectral variability on timescales of ∼months. A quarter of the sources are found to be variable between observations. However, except for two foreground sources, no source is variable within any observation above the 99% confidence level. Only six sources show significant spectral variability between observations. A comparison of NH values with H I observations shows that X-ray absorption values are consistent with Galactic X-ray binaries and most sources in M33 are intrinsically absorbed. The pattern of variability and the spectral parameters of these sources are consistent with the M33 X-ray source population being dominated by X-ray binaries: Two-thirds of the 43 bright sources have spectral and timing properties consistent with X-ray binaries; we also find two candidates for supersoft sources and two candidates for quasi-soft sources.

Abstract Copyright:

Journal keyword(s): Galaxies: Individual: Messier Number: M33 - Galaxies: Local Group - X-Rays: Binaries

Simbad objects: 84

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Number of rows : 84

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M33SNR 5 SNR 01 32 53.57 +30 38 15.2 18.60 19.19 19.33     ~ 25 0
2 [MPH2006] 76 * 01 32 53.5856003480 +30 33 06.140969779   21.13 19.62     ~ 14 0
3 RX J0133.1+3048 X 01 33 08.34 +30 48 03.7           ~ 8 0
4 [HS80] B100 WR* 01 33 15.169 +30 53 19.64 17.60 18.28 18.45     ~ 32 1
5 CXOU J013315.5+304448 X 01 33 15.584 +30 44 48.28           ~ 2 0
6 2MASS J01332174+3038588 G 01 33 21.74 +30 38 58.8           ~ 9 1
7 XMMU J013322.0+303922 X 01 33 21.96 +30 39 23.0           ~ 5 0
8 [MPH2006] 121 X 01 33 23.95 +30 48 20.6           ~ 6 0
9 2E 406 X 01 33 24.42 +30 44 02.6           ~ 20 0
10 [MPH2006] 128 * 01 33 27.7673131627 +30 46 47.463616267   17.71 16.72     ~ 8 0
11 [MPH2006] 135 X 01 33 28.74 +30 43 22.5           ~ 6 0
12 SNR B013040+30269 SNR 01 33 29.03 +30 42 17.0           ~ 33 0
13 ChASeM33 J013329.29+304537.4 X 01 33 29.29 +30 45 37.5           ~ 13 0
14 RX J0133.4+3045 X 01 33 29.30 +30 45 08.6           ~ 10 0
15 [LBW2010] 37 SNR 01 33 29.45 +30 49 10.6           ~ 23 0
16 SNR B013042+30182 SNR 01 33 31.24 +30 33 33.4 18.78 20.65 20.25     ~ 45 0
17 [MPH2006] 146 X 01 33 32.90 +30 49 16.6           ~ 6 0
18 NAME M33 X-7 HXB 01 33 34.13 +30 32 11.3 17.50 18.80 18.70     O 127 2
19 [PMH2004] 172 X 01 33 34.13 +30 37 15.1           ~ 5 0
20 [MPH2006] 153 X 01 33 35.45 +30 37 29.6           ~ 6 0
21 SNR B013047+30211 SNR 01 33 35.92 +30 36 27.5           ~ 42 0
22 [MPH2006] 155 X 01 33 36.42 +30 37 43.0           ~ 7 0
23 [MPH2006] 158 HII 01 33 37.5258322535 +30 47 18.791856898           ~ 11 1
24 [MPH2006] 160 X 01 33 39.22 +30 40 50.3           ~ 6 0
25 [MPH2006] 163 X 01 33 40.10 +30 43 23.6           ~ 6 0
26 IFM-B 787 * 01 33 41.5073227269 +30 41 36.441208251   19.2 19.00     ~ 6 0
27 [SB95] 14 PM* 01 33 41.8780857563 +30 38 49.075130441           M5 12 1
28 [MPH2006] 171 X 01 33 42.54 +30 42 53.8           ~ 7 0
29 TYC 2293-637-1 * 01 33 43.3886526229 +30 46 30.807739542   11.77 11.37     G5 12 0
30 CXOU J013344.2+304026 X 01 33 44.245 +30 40 26.16           ~ 2 0
31 CXOU J013346.2+303807 X 01 33 46.252 +30 38 07.18           ~ 2 0
32 RX J0133.7+3037 X 01 33 46.56 +30 37 49.0           ~ 9 0
33 [GDK99] 100 X 01 33 50.5296224573 +30 38 22.082833769           ~ 8 0
34 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5134 1
35 ChASeM33 204 X 01 33 53.71 +30 36 05.8           ~ 4 0
36 SNR B013106+30178 SNR 01 33 54.88 +30 33 10.6           ~ 43 0
37 RX J0133.9+3037 X 01 33 56.7682909224 +30 37 29.823857626           ~ 8 0
38 RX J0133.9+3050 X 01 33 58.86 +30 50 04.2           ~ 8 0
39 RX J0134.0+3031 X 01 34 01.13 +30 31 36.8           ~ 8 0
40 [MPH2006] 199 X 01 34 01.9290390973 +30 30 06.683855213           ~ 7 0
41 XMMU J013409.9+303221 X 01 34 09.925 +30 32 19.92           ~ 7 0
42 [MPH2006] 208 X 01 34 09.93 +30 50 45.5           ~ 6 0
43 [MPH2006] 209 X 01 34 10.47 +30 53 47.1           ~ 6 0
44 [MPH2006] 210 X 01 34 10.51 +30 39 46.4           ~ 7 0
45 SNR B013121+30271 SNR 01 34 10.67 +30 42 23.6           ~ 39 0
46 [MPH2006] 219 X 01 34 16.77 +30 51 01.8           ~ 6 0
47 [PMH2004] 265 X 01 34 19.32 +30 49 42.6           ~ 5 0
48 [MPH2006] 229 X 01 34 21.09 +30 49 32.3           ~ 6 0
49 CXOU J013424.6+304428 X 01 34 24.628 +30 44 28.85           ~ 2 0
50 ChASeM33 J013425.33+304159.7 X 01 34 25.34 +30 41 59.2           ~ 7 0
51 CXOU J013425.5+305514 X 01 34 25.501 +30 55 14.88           ~ 2 0
52 [MPH2006] 238 X 01 34 25.74 +30 28 17.8           ~ 7 0
53 [MPH2006] 243 X 01 34 26.72 +30 48 13.1           ~ 6 0
54 [MPH2006] 244 X 01 34 26.98 +30 43 13.2           ~ 6 0
55 XMMU J013429.0+304216 X 01 34 29.10 +30 42 13.2           ~ 5 0
56 [MPH2006] 249 X 01 34 29.75 +30 50 26.5           ~ 7 0
57 [MPH2006] 251 X 01 34 32.02 +30 34 54.2           ~ 6 0
58 NGC 604 HII 01 34 32.1 +30 47 01           ~ 544 0
59 2MASS J01343216+3051591 G 01 34 32.1628559319 +30 51 59.290271833           ~ 8 1
60 [PMH2004] 296 X 01 34 32.56 +30 34 36.7           ~ 5 0
61 [PMH2004] 295 X 01 34 32.62 +30 50 35.8           ~ 5 0
62 CXOU J013433.7+304701 X 01 34 33.763 +30 47 01.92           ~ 3 0
63 ChASeM33 J013435.06+304439.3 Rad 01 34 35.04 +30 44 39.2           ~ 7 0
64 [MPH2006] 258 X 01 34 35.1629099635 +30 56 46.821783607           ~ 7 0
65 CXOU J013436.3+305500 X 01 34 36.3 +30 55 00           ~ 8 0
66 [MPH2006] 260 X 01 34 36.42 +30 47 14.1           ~ 7 0
67 [MPH2006] 265 X 01 34 38.74 +30 45 39.4           ~ 7 0
68 2E 424 X 01 34 38.8399692802 +30 55 04.656150337           ~ 12 0
69 [MPH2006] 267 X 01 34 39.7571535438 +30 51 42.550223328           ~ 7 0
70 [MPH2006] 276 X 01 34 44.637 +30 55 35.46           ~ 7 0
71 [NM2011] J013445.02+304928.0 QSO 01 34 44.9926756132 +30 49 27.982078031 19.283 20.321 20.110 19.812 19.227 ~ 10 0
72 ChASeM33 366 X 01 34 46.78 +30 44 49.8           ~ 4 0
73 [MPH2006] 283 X 01 34 49.05 +30 44 47.1           ~ 6 0
74 [MPH2006] 286 X 01 34 51.13 +30 43 57.1           ~ 6 0
75 [SSA2010] 2292 G 01 34 51.95 +30 46 16.4           ~ 9 1
76 [HP2001] 163 X 01 34 53.225 +30 57 18.28           ~ 6 0
77 [MJ98] A4 * 01 35 01.0447753163 +30 43 47.797737040           ~ 8 0
78 NGC 4038 GiP 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1274 1
79 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1555 0
80 NGC 4039 GiP 12 01 53.8 -18 53 06   11.08   9.77   ~ 1130 1
81 NGC 4697 GiG 12 48 35.8992791100 -05 48 02.497675635   10.97   9.83   ~ 803 0
82 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2544 2
83 V* MM Ser LXB 18 39 57.56 +05 02 09.6   19.2 19.2     ~ 319 0
84 NAME Local Group GrG ~ ~           ~ 6970 0

    Equat.    Gal    SGal    Ecl

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2020.07.05-06:39:00

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