2008ApJ...677.1157C

Query : 2008ApJ...677.1157C

2008ApJ...677.1157C - Astrophys. J., 677, 1157-1167 (2008/April-3)

Connecting gamma-ray bursts and galaxies: the probability of chance coincidence.

COBB B.E. and BAILYN C.D.

Abstract (from CDS):

Studies of gamma-ray burst (GRB) host galaxies are crucial to understanding GRBs. However, since they are identified by the superposition in the plane of the sky of a GRB afterglow and a galaxy, there is always a possibility that an association represents a chance alignment, rather than a physical connection. We examine a uniform sample of 72 GRB fields to explore the probability of chance superpositions. There is typically a ∼1% chance that an optical afterglow will coincide with a galaxy by chance. While spurious host galaxy detections will, therefore, be rare, the possibility must be considered when examining individual GRB/host galaxy examples. It is also tempting to use the large and uniform collection of X-ray afterglow positions to search for GRB-associated galaxies. However, we find that approximately half of the 14 superpositions in our sample are likely to occur by chance, so in the case of GRBs localized only by an X-ray afterglow, even statistical studies are suspect.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Bursts

Simbad objects: 74

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Number of rows : 74
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 GRB 060912A gB 00 21 08.11 +20 58 18.9           ~ 116 1
2 GRB 050922B gB 00 23 13.400 -05 36 17.80           ~ 79 0
3 GRB 060708 gB 00 31 13.850 -33 45 32.40 19.07 19.79 17.37     ~ 109 0
4 GRB 060719 gB 01 13 43.380 -48 22 55.09           ~ 107 0
5 GRB 051021A gB 01 56 36.370 +09 04 03.27           ~ 45 0
6 GRB 061007 gB 03 05 19.510 -50 30 02.50 14.28 14.40 12.95     ~ 315 1
7 GRB 070318 gB 03 13 56.830 -42 56 46.30 18.27 16.23 15.49     ~ 170 0
8 GRB 050318 gB 03 18 51.000 -46 23 43.61 18.10 18.68 17.58     ~ 189 0
9 GRB 050822 gB 03 24 27.240 -46 01 59.20     20.82     ~ 115 0
10 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 2282 1
11 GRB 060115 gB 03 36 08.400 +17 20 43.00           ~ 179 0
12 GRB 060904B gB 03 52 50.520 -00 43 30.61 18.27 19.14 18.37     ~ 208 0
13 GRB 050827 gB 04 17 09.610 +18 12 01.21 20.79         ~ 36 0
14 GRB 060313 G 04 26 28.4020 -10 50 39.901 20.55 21.03 19.66     ~ 156 0
15 GRB 060211B gB 05 00 17.110 +14 56 57.30           ~ 41 0
16 GRB 050915A gB 05 26 44.804 -28 00 59.27           ~ 88 0
17 GRB 060116 gB 05 38 46.170 -05 26 15.08           ~ 86 0
18 GRB 051117B gB 05 40 43.260 -19 16 26.10           ~ 77 0
19 GRB 050826 gB 05 51 01.590 -02 38 35.40           ~ 136 0
20 GRB 060729 gB 06 21 31.850 -62 22 12.69           ~ 303 0
21 GRB 061004 gB 06 31 10.710 -45 54 28.71           ~ 51 0
22 GRB 061202 gB 07 02 06.190 -74 41 54.91           ~ 83 0
23 GRB 051006 gB 07 23 13.520 +09 30 24.48           ~ 74 0
24 GRB 061006 G 07 24 07.8080 -79 11 55.188           ~ 214 0
25 GRB 060213 gB 09 26 24.140 -09 06 57.40           ~ 19 0
26 GRB 050502B gB 09 30 10.024 +16 59 48.07           ~ 169 0
27 GRB 061021 gB 09 40 36.120 -21 57 05.40 18.21 19.20 16.82     ~ 160 0
28 GRB 060108 gB 09 48 01.980 +31 55 08.59           ~ 107 0
29 GRB 061121 gB 09 48 54.570 -13 11 42.68 17.19 17.71 17.02     ~ 350 0
30 GRB 070306 gB 09 52 23.220 +10 28 55.20           ~ 222 1
31 GRB 061102 gB 09 53 37.840 -17 01 26.50           ~ 32 0
32 GRB 060602A gB 09 58 16.93 +00 18 12.8           ~ 49 0
33 GRB 061217 gB 10 41 39.320 -21 07 22.11           ~ 128 0
34 GRB 050219A gB 11 05 38.990 -40 41 03.00           ~ 97 0
35 GRB 050714B gB 11 18 47.610 -15 32 48.90           ~ 80 0
36 GRB 070224 gB 11 56 06.650 -13 19 48.80           ~ 60 0
37 GRB 050408 gB 12 02 17.320 +10 51 10.00           ~ 153 0
38 GRB 050412 gB 12 04 25.060 -01 12 03.60           ~ 85 0
39 GRB 050416 gB 12 33 54.600 +21 03 26.69     19.12     ~ 300 1
40 SDSS J123612.87+285858.8 BiC 12 36 12.8803407000 +28 58 58.780075656           ~ 328 1
41 GRB 050520 gB 12 50 05.770 +30 27 02.30           ~ 37 0
42 GRB 050726 gB 13 20 11.900 -32 03 51.89     17.58     ~ 70 0
43 GRB 050801 gB 13 36 35.000 -21 55 41.00 15.03 15.82 15.46     ~ 164 0
44 GRB 060204B gB 14 07 14.900 +27 40 36.40           ~ 93 0
45 GRB 050730 gB 14 08 17.090 -03 46 18.90   20.32 17.68     ~ 327 0
46 GRB 060801 G 14 12 01.2620 +16 58 55.970           ~ 172 0
47 GRB 050128 gB 14 38 17.750 -34 45 55.61           ~ 68 0
48 GRB 060805A gB 14 43 43.480 +12 35 11.40           ~ 65 0
49 GRB 060814 gB 14 45 21.480 +20 35 11.80           ~ 241 0
50 GRB 060714 gB 15 11 26.450 -06 33 58.30   20.21 18.54     ~ 209 0
51 GRB 060526 gB 15 31 18.360 +00 17 04.90   18.31 17.16     ~ 288 0
52 UGCS J162444.39-273226.8 G 16 24 44.38275 -27 32 26.8381     19.70     ~ 469 1
53 GRB 050401 gB 16 31 28.84 +02 11 14.5           ~ 348 0
54 GRB 060926 gB 17 35 43.660 +13 02 18.60     19.36     ~ 135 0
55 GRB 070330 gB 17 58 09.980 -63 47 34.80     18.87     ~ 48 0
56 GRB 050223 gB 18 05 32.200 -62 28 20.40           ~ 109 0
57 GRB 060919 gB 18 27 41.740 -51 00 52.41           ~ 41 0
58 SN 2005nc SN* 18 32 32.560 +26 20 22.34           SNIc: 400 1
59 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1928 2
60 GRB 070429A gB 19 50 48.900 -32 24 17.01           ~ 40 0
61 GRB 061025 gB 20 03 37.100 -48 14 37.00           ~ 21 0
62 GRB 050315 gB 20 25 54.100 -42 36 02.19           ~ 225 0
63 GRB 070508 gB 20 51 11.810 -78 23 04.88     19.62     ~ 144 0
64 GRB 070419B gB 21 02 49.820 -31 15 49.30   20.35       ~ 86 0
65 GRB 060614 G 21 23 32.140 -53 01 36.10           ~ 714 0
66 GRB 060927A gB 21 58 11.930 +05 21 50.32           ~ 215 0
67 GRB 051210 gB 22 00 40.930 -57 36 47.10           ~ 138 0
68 GRB 060505 gB 22 07 03.440 -27 48 51.89           ~ 286 1
69 GRB 061201 gB 22 08 32.060 -74 34 47.90           ~ 205 0
70 GRB 061110A gB 22 25 09.800 -02 15 30.70 21.43         ~ 134 0
71 GRB 060604 gB 22 28 55.010 -10 54 55.80 20.34 20.31       ~ 134 0
72 GRB 060923C gB 23 04 28.36 +03 55 28.4           ~ 57 0
73 GRB 050803 gB 23 22 37.910 +05 47 09.00           ~ 127 0
74 GRB 051001 gB 23 23 48.580 -31 31 25.70           ~ 80 0

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