2002ApJ...578..114K

Query : 2002ApJ...578..114K

2002ApJ...578..114K - Astrophys. J., 578, 114-125 (2002/October-2)

A Chandra high resolution camera observation of X-ray point sources in M31.

KAARET P.

Abstract (from CDS):

We present results from a 47 ks observation of the Andromeda galaxy, M31, using the High Resolution Camera of the Chandra X-Ray Observatory. We detect 142 point sources spanning 3 orders of magnitude in luminosity, from LX=2x1035 to 2x1038 ergs.s–1 in the 0.1-10 keV band. The X-ray source location accuracy is better than 1" in the central regions of the galaxy. One source lies within 1".3 of SN 1885 but does not coincide with the UV absorption feature identified as the supernova remnant. However, there is an optical transient, which is likely an optical nova, at the location of the X-ray source. There is a weak source, LX∼4x1036 ergs.cm2.s–1, coincident with the nucleus of M31 and 14 sources coincident with globular clusters. Our observation has very high efficiency down to luminosities of 1.5x1036 ergs.s–1 for sources within 5' of the nucleus. Comparing with a ROSAT observation made 11 yr earlier, we find that 0.46±0.26 of the sources with LX>5x1036 ergs .s–1 are variable. We find no evidence for X-ray pulsars in this region, indicating that the population is likely dominated by low-mass X-ray binaries. The source density radial profile follows a power-law distribution with an exponent of 1.25±0.10 and is inconsistent with the optical surface brightness profile. The X-ray point-source luminosity function is well fitted by a differential broken power law with a break at a luminosity of (4.5+1.1–2.2)x1037 ergs.s–1. The luminosity function is consistent with a model of an aging population of X-ray binaries.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Individual: Messier Number: M31 - Galaxies: Individual: NGC Number: NGC 224 - Galaxies: Spiral - X-Rays: Binaries - X-Rays: Galaxies - X-Rays: General

VizieR on-line data: <Available at CDS (J/ApJ/578/114): table1.dat table2.dat>

Nomenclature: Table 1: [K2002] JHHMMSS.ss+DDMMSS.s N=143.

CDS comments: T.1: sources are also CXOM31 JHHMMSS.s+DDMMSS sources.

Simbad objects: 148

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Number of rows : 148
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 2E 130 X 00 41 50.336 +41 13 37.16           ~ 9 0
2 2XMM J004151.5+411438 AG? 00 41 51.582 +41 14 38.29           ~ 9 1
3 CXOM31 J004207.5+411025 X 00 42 07.500 +41 10 25.63           ~ 5 0
4 RX J0042.1+4118 XB? 00 42 07.697 +41 18 15.17           ~ 15 0
5 RX J0042.1+4104 X 00 42 07.91 +41 04 37.0           ~ 10 0
6 RX J004209.3+412040 X 00 42 09.030 +41 20 48.42           ~ 11 0
7 [M93b] 140 GlC 00 42 09.49 +41 17 45.6 20.017 18.621 17.069 16.064   ~ 25 0
8 2MASS J00421028+4115102 s?r 00 42 10.2966322464 +41 15 10.349555256 22.318 21.114 19.313 18.622 17.505 ~ 13 0
9 CXOM31 J004210.9+411248 X 00 42 10.917 +41 12 48.05           ~ 8 0
10 CXOM31 J004211.7+411048 * 00 42 11.711 +41 10 48.70           ~ 10 0
11 CXOM31 J004211.9+411649 X 00 42 11.944 +41 16 48.49           ~ 7 0
12 Bol 78 GlC 00 42 12.1550530152 +41 17 58.812456840 20.138 19.220 17.817 16.911 16.174 ~ 43 0
13 RX J004212.3+411819 XB? 00 42 13.10 +41 18 35.5           ~ 16 0
14 CXOM31 J004215.0+411234 XB? 00 42 15.089 +41 12 34.23           ~ 10 0
15 CXOM31 J004215.2+411801 X 00 42 15.216 +41 18 02.25           ~ 7 0
16 RX J0042.2+4120 X 00 42 15.428 +41 20 32.27           ~ 12 0
17 RX J004215.9+411717 XB? 00 42 15.649 +41 17 21.11           ~ 15 0
18 Bol 82 GlC 00 42 15.8394998856 +41 01 14.308375260 18.082 16.972 15.465 14.497 13.630 ~ 79 0
19 [HPH2013] 40 XB? 00 42 16.997 +41 15 08.54           ~ 11 0
20 RX J004217.2+411226 XB? 00 42 18.319 +41 12 23.53           ~ 12 0
21 Bol 86 GlC 00 42 18.6515838696 +41 14 01.999584816 15.985 15.899 15.131 14.661 13.920 ~ 76 0
22 CXOM31 J004220.5+412640 AG? 00 42 20.34 +41 26 40.5           ~ 11 0
23 C84 23 X 00 42 21.460 +41 16 01.32           ~ 10 0
24 2MASS J00422155+4114197 s?r 00 42 21.5572037424 +41 14 19.721183064 20.615 19.819 18.688 18.109 17.715 ~ 10 0
25 C84 25 X 00 42 22.394 +41 13 33.99           ~ 12 0
26 RX J004222.8+411536 XB* 00 42 22.919 +41 15 35.14           ~ 22 0
27 C84 27 XB? 00 42 23.152 +41 14 07.49           ~ 11 0
28 RX J004224.0+411346 XB? 00 42 25.112 +41 13 40.40           ~ 13 0
29 Bol 96 GlC 00 42 26.080 +41 19 14.79 18.796 17.863 16.635 15.857 15.188 ~ 67 0
30 RX J0042.4+4125 X 00 42 26.152 +41 25 52.74           ~ 14 0
31 CXOM31 J004228.2+411000 XB? 00 42 28.167 +41 09 59.84           ~ 12 0
32 RX J004228.5+411219 X 00 42 28.268 +41 12 22.76           ~ 16 0
33 2E 144 XB? 00 42 28.867 +41 04 34.98           ~ 14 0
34 [K2002] J004229.11+412857.0 X 00 42 29.11 +41 28 57.0           ~ 3 0
35 CXOM31 J004230.9+411910 X 00 42 30.943 +41 19 10.32           ~ 6 0
36 RX J004231.4+411618 X 00 42 31.123 +41 16 21.74           ~ 17 0
37 Bol 107 GlC 00 42 31.2490262592 +41 19 38.842862160 17.00 16.725 15.764 15.171 14.681 ~ 72 0
38 RX J0042.5+4113 X 00 42 32.057 +41 13 14.24           ~ 10 0
39 [HPH2013] 78 X 00 42 32.726 +41 13 10.77           ~ 7 0
40 CXOM31 J004233.8+411620 XB? 00 42 33.865 +41 16 19.28           ~ 10 0
41 CXOM31 J004234.1+412149 X 00 42 34.147 +41 21 50.23           ~ 6 0
42 RX J004235.5+411947 XB? 00 42 35.199 +41 20 06.09           ~ 11 0
43 CXOM31 J004236.6+411350 V* 00 42 36.6003379776 +41 13 50.257476012   21.4 19.9 18.72 16.8 ~ 12 0
44 RX J004241+41155 LXB 00 42 38.59 +41 16 03.2           ~ 22 1
45 CXOM31 J004239.5+411428 X 00 42 39.529 +41 14 28.52           ~ 9 0
46 [BGM2013] BHC 9 X 00 42 39.57 +41 16 14.5           ~ 10 0
47 CXOM31 J004239.6+411700 X 00 42 39.65 +41 17 00.8           ~ 3 0
48 CXOM31 J004239.9+411547 PN 00 42 39.74 +41 15 49.2     20.76     ~ 17 0
49 CXOM31 J004240.2+411845 XB? 00 42 40.199 +41 18 45.38           ~ 9 0
50 RX J0042.6+4113 X 00 42 40.644 +41 13 27.30           ~ 12 0
51 Bol 123 GlC 00 42 40.66 +41 10 33.4 18.632 18.231 17.321 16.738 16.116 ~ 47 0
52 Bol 124 GlC 00 42 41.43 +41 15 23.9 16.153 15.589 14.73 14.060 13.74 ~ 66 0
53 CXOM31 J004241.6+412106 X 00 42 41.644 +41 21 06.02           ~ 7 1
54 [HPH2013] 130 XB? 00 42 42.10 +41 15 33.7           ~ 6 0
55 RX J004241.6+411440 X 00 42 42.327 +41 14 45.54           ~ 12 0
56 CXOM31 J004242.1+411218 X 00 42 42.43 +41 12 19.2           ~ 9 0
57 CXOM31 J004242.4+411553 PN 00 42 42.464 +41 15 53.82           ~ 10 0
58 [HPH2013] 137 X 00 42 42.515 +41 16 59.59           ~ 9 0
59 CXOM31 J004242.7+411503 X 00 42 42.73 +41 15 04.1           ~ 3 0
60 RX J0042.7+4115 X 00 42 42.985 +41 15 43.26           ~ 13 1
61 V* S And No* 00 42 43.12368 +41 16 03.2124           ~ 183 2
62 [K2002] J004243.18+411640.4 SR? 00 42 43.192 +41 16 40.31           ~ 9 0
63 CXOM31 J004243.3+411319 X 00 42 43.303 +41 13 19.48           ~ 8 0
64 CXOM31 J004243.7+411632 XB? 00 42 43.739 +41 16 32.60           ~ 8 0
65 [HPH2013] 156 XB? 00 42 43.856 +41 16 04.05           ~ 7 0
66 [K2002] J004243.80+411629.2 X 00 42 43.883 +41 16 29.97           ~ 4 0
67 2MASS J00424414+4117549 No* 00 42 44.144 +41 17 54.90       16.8   ~ 22 0
68 CXOM31 J004244.3+411605 PN 00 42 44.23 +41 16 03.7           ~ 7 0
69 [KGP2002] r1-22 X 00 42 44.283 +41 16 14.25           ~ 4 0
70 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12635 1
71 [K2002] J004244.35+411608.9 X 00 42 44.351 +41 16 08.90           ~ 8 0
72 [O2006] QSS 8 X 00 42 44.365 +41 16 07.65           ~ 8 0
73 CXOM31 J004244.3+411158 XB? 00 42 44.404 +41 11 57.90           ~ 6 0
74 CXOM31 J004244.6+411618 X 00 42 44.667 +41 16 18.28           ~ 8 0
75 RX J004244.7+411136 HXB 00 42 44.844 +41 11 37.76           ~ 15 0
76 CXOM31 J004244.8+411739 V* 00 42 44.853 +41 17 40.98           ~ 7 0
77 RX J0042.7+4114 XB? 00 42 45.092 +41 14 07.13           ~ 11 0
78 [BGM2013] BHC 13 X 00 42 45.109 +41 16 21.90           ~ 7 0
79 CXOM31 J004245.0+411523 PN 00 42 45.15 +41 15 23.6     21.04     ~ 15 0
80 [HPH2013] 182 XB? 00 42 45.226 +41 16 11.31           ~ 4 0
81 [HPH2013] 183 XB? 00 42 45.586 +41 16 08.79           ~ 4 0
82 [HPH2013] 188 X 00 42 45.95 +41 15 46.9           ~ 7 0
83 [HPH2013] 186 XB? 00 42 45.996 +41 16 19.77           ~ 6 0
84 2MASS J00424684+4116146 AG? 00 42 46.84 +41 16 14.7           ~ 11 0
85 CXOM31 J004246.8+412118 X 00 42 46.912 +41 21 19.65           ~ 6 1
86 2MASS J00424699+4116280 PN 00 42 47.00 +41 16 28.1     21.18     ~ 19 0
87 [FRS2006] WeCAPP V08501 X 00 42 47.16 +41 14 13.4           ~ 3 0
88 CXOM31 J004247.2+411158 XB? 00 42 47.35 +41 11 57.9           ~ 7 0
89 M31N 2000-08a No* 00 42 47.45 +41 15 07.7       18.6   ~ 12 0
90 CXOM31 J004247.8+411533 X 00 42 47.891 +41 15 33.04           ~ 11 0
91 CXOM31 J004247.0+411550 XB? 00 42 48.014 +41 15 48.53           ~ 9 0
92 RX J004248.7+412522 HXB 00 42 48.501 +41 25 23.10           ~ 17 0
93 CXOM31 J004248.5+411521 X 00 42 48.528 +41 15 21.31           ~ 13 0
94 [KGP2002] r1-16 X 00 42 48.715 +41 16 24.64           ~ 6 0
95 [HPH2013] 208 XB? 00 42 49.141 +41 17 42.25           ~ 6 0
96 CXOM31 J004249.2+411816 XB? 00 42 49.233 +41 18 16.26           ~ 11 0
97 CXOM31 J004251.2+411639 X 00 42 51.30 +41 16 39.6           ~ 4 0
98 CXOM31 J004251.6+411303 X 00 42 51.633 +41 13 02.65           ~ 6 0
99 Bol 135 GlC 00 42 51.9745899672 +41 31 08.204480040 17.117 16.866 15.953 15.358 14.820 ~ 70 0
100 [KGP2002] r2-50 X 00 42 52.281 +41 17 35.02           ~ 4 0
101 RX J004253.0+411533 X 00 42 52.528 +41 15 40.20           ~ 29 0
102 RX J0042.8+4118 XB? 00 42 52.528 +41 18 54.75           ~ 14 0
103 [KGP2002] r2-38 X 00 42 52.621 +41 13 28.72           ~ 4 0
104 [K2002] J004253.49+412549.9 X 00 42 53.49 +41 25 49.9           ~ 2 0
105 RX J004253.9+411553 X 00 42 54.937 +41 16 03.46           ~ 15 0
106 [K2002] J004255.18+411836.4 X 00 42 55.186 +41 18 36.33           ~ 2 0
107 CXOM31 J004255.3+412045 No* 00 42 55.20 +41 20 46.0   17.5       ~ 16 0
108 CXOM31 J004255.3+412558 X 00 42 55.394 +41 25 56.60           ~ 12 1
109 Bol 138 GlC 00 42 55.6094085216 +41 18 35.071533612 18.668 17.917 16.917 16.321 15.782 ~ 42 0
110 2E 152 X 00 42 57.932 +41 11 04.59           ~ 16 0
111 CXOM31 J004258.3+411529 XB? 00 42 58.335 +41 15 29.46           ~ 11 0
112 2MASS J00425938+4116461 No* 00 42 59.383 +41 16 46.14           ~ 15 0
113 CXOM31 J004259.5+411242 X 00 42 59.558 +41 12 42.26           ~ 6 0
114 Bol 143 GlC 00 42 59.6426520720 +41 19 19.253372304 17.800 17.075 16.087 15.486 14.94 ~ 82 0
115 Bol 144 GlC 00 42 59.8584082992 +41 16 05.750106096 18.47 17.691 16.727 16.153 15.74 ~ 61 0
116 RX J0043.0+4113 X 00 43 01.119 +41 13 51.69           ~ 8 0
117 CXOM31 J004301.2+412017 GlC 00 43 01.2 +41 20 17           ~ 3 0
118 Bol D91 GlC 00 43 01.4352697272 +41 30 17.383048452     15.44     ~ 46 0
119 RX J004301.8+413015 XB* 00 43 01.46 +41 30 17.0           ~ 13 0
120 Bol 146 GlC 00 43 02.921 +41 15 22.51 18.34 17.851 16.930 16.348 15.870 ~ 57 1
121 CXOM31 J004303.0+412042 PN 00 43 03.090 +41 20 40.01     22.73     ~ 13 0
122 [BGM2013] BHC 27 XB* 00 43 03.241 +41 15 28.00           ~ 10 1
123 Bol 147 GlC 00 43 03.3010962456 +41 21 21.675453660 17.188 16.563 15.594 15.003 14.73 ~ 70 0
124 CXOM31 J004303.1+411015 Pu* 00 43 03.3526576920 +41 10 17.180014152   16.299 15.38 14.778 14.4 ~ 15 0
125 Bol 148 GlC 00 43 03.8563107048 +41 18 04.761860328 16.80 16.623 15.799 15.284 14.869 ~ 81 0
126 CXOM31 J004304.2+411601 XB? 00 43 04.24 +41 16 01.6   19.1       ~ 11 0
127 CXOM31 J004305.6+411702 XB? 00 43 05.66 +41 17 02.7           ~ 16 0
128 NAME Nova RJC99 Jul-98 No* 00 43 06.96 +41 18 09.9           ~ 17 1
129 Bol 150 GlC 00 43 07.51 +41 20 19.8 18.275 17.644 16.665 16.059 15.508 ~ 44 0
130 RX J0043.1+4112 XB* 00 43 08.687 +41 12 48.30           ~ 17 0
131 2MASS J00430986+4119006 Gl? 00 43 09.8481275808 +41 19 00.778534248 19.586 18.829 17.723 17.045 16.452 ~ 35 0
132 Bol 153 GlC 00 43 10.6182973728 +41 14 51.289897920 17.726 17.117 16.148 15.553 14.98 ~ 70 0
133 C84 99 X 00 43 11.391 +41 18 09.76           ~ 10 0
134 CXOM31 J004313.1+411814 X 00 43 13.250 +41 18 13.96           ~ 6 0
135 CXOM31 J004314.3+410721 LXB 00 43 14.38 +41 07 21.4           ~ 3 0
136 Bol 158 GlC 00 43 14.3953843272 +41 07 21.141017796 15.900 15.560 14.65 14.150 13.550 ~ 117 1
137 RX J0043.2+4118 XB? 00 43 16.165 +41 18 41.73           ~ 10 0
138 [PFF2005] WeCAPP-N2001-08 No* 00 43 18.62 +41 09 49.1       18.7   ~ 8 0
139 RX J004318.6+412024 CV* 00 43 18.851 +41 20 18.52           ~ 24 0
140 NAME M31PSS CV* 00 43 19.59 +41 17 56.9           ~ 25 0
141 2E 157 XB? 00 43 20.9549140080 +41 17 51.901455012     21.23     ~ 21 0
142 CXOM31 J004324.9+411728 X 00 43 24.957 +41 17 28.33           ~ 7 0
143 BA 1-23 SNR 00 43 27.871 +41 18 29.83           ~ 35 0
144 2E 158 X 00 43 29.21 +41 07 48.6           ~ 14 0
145 RX J0043.5+4110 X 00 43 32.460 +41 10 41.66           ~ 12 0
146 RX J0043.5+4113 X 00 43 34.410 +41 13 23.72           ~ 17 0
147 Bol 185 GlC 00 43 37.2819255864 +41 14 43.514072700 16.910 16.475 15.543 14.982 14.47 ~ 75 0
148 [K2002] J004353.62+411654.0 Gl? 00 43 53.62 +41 16 54.0           ~ 3 0

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