2000A&A...358..910V


Query : 2000A&A...358..910V

2000A&A...358..910V - Astronomy and Astrophysics, volume 358, 910-922 (2000/6-3)

Multiple and variable X-ray sources in the globular clusters ω Cen, NGC 6397, NGC 6752, and Liller 1.

VERBUNT F. and JOHNSTON H.M.

Abstract (from CDS):

We detect stars from the Hipparcos and Tycho Catalogues in the field of view of observations with the ROSAT HRI of three globular clusters. We use the positions of these stars to reduce the systematic error in the positions of X-ray sources in the clusters to ∼2'' for ω Cen and NGC 6752, and 1'' for NGC 6397. We detect three X-ray sources in the core of ω Cen, and four in the core of NGC 6752; the data for the center of NGC 6397 may be fitted with five or six sources. Outside the cores, but within the half-mass radius of the clusters, we detect two sources in ω Cen, one in NGC 6397 and two in NGC 6752; these may or may not be cluster members. A ROSAT HRI observation of Liller1 does not detect a low-luminosity source, at a limit below a detection with ASCA. We discuss the nature of the low-luminosity X-ray sources in globular clusters in the light of these new results.

Abstract Copyright:

Journal keyword(s): Galaxy: globular clusters: individual: ω Cen, NGC 6397, NGC 6752, Liller 1 - X-rays: stars

Nomenclature: Table 2: [JVH94] NGC 5139 NNa (Nos 9a-9b, 18-21) added. Table 3: [JVH94] NGC 6397 NNa (Nos 4a-4e, 11-19) added. Table 6: [JVH94] NGC 6752 NNa (Nos 7a-7b, 13-22) added.

Simbad objects: 71

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Number of rows : 71
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 RX J0021.8-7221 CV* 00 24 04.263 -72 04 57.97 18.868   19.772   19.316 ~ 59 0
2 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3722 0
3 Cl* NGC 104 MAM M54898 CV* 00 24 06.013 -72 04 56.20 19.383   20.411   19.273 ~ 32 0
4 HD 17925 RS* 02 52 32.1281856011 -12 46 10.968056223 7.48 6.91 6.05 5.34 4.89 K1V 486 0
5 2MASS J13255214-4719085 Y*? 13 25 52.1440450344 -47 19 08.487218676 16.877 16.295 14.764   12.296 ~ 11 0
6 [GBW2003] 10 X 13 26 11.4 -47 37 11           ~ 3 0
7 2E 3049 X 13 26 19.796 -47 29 10.51   26.8   25.3   ~ 20 0
8 2XMM J132625.1-473227 AG? 13 26 25.14 -47 32 27.4           ~ 7 0
9 HD 116789 * 13 26 46.3304474544 -47 19 46.052982804   8.52 8.43     A0V 14 0
10 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 3231 0
11 [RBB2002b] 18 X 13 26 48.651 -47 27 44.82   22.3   21.3   ~ 5 0
12 2E 1323.8-4713 X 13 26 48.656 -47 27 44.88           ~ 8 0
13 [GBW2003] 9 X 13 26 48.731 -47 31 25.28   22.2   21.7   ~ 6 0
14 [CCG2000] Star A CV* 13 26 52.135 -47 29 35.63   21.6   20.9   ~ 11 0
15 [JVH94] NGC 5139 9 X 13 26 52.8 -47 29 10           ~ 4 0
16 [CCG2000] Star B CV* 13 26 53.513 -47 29 00.38   21.1   20.0   ~ 11 0
17 Cl* NGC 5139 SAW V208 EB* 13 27 10.524 -47 26 07.40 17.635 17.532 17.285 17.094 16.720 ~ 8 0
18 [GBW2003] 18 X 13 27 21.200 -47 23 23.73           ~ 4 0
19 NGC 5139 6221 Y*? 13 27 27.6571684512 -47 19 07.636014300 17.018 16.220 14.654 14.46 11.968 ~ 12 0
20 2XMM J132729.2-472554 AG? 13 27 29.30 -47 25 54.1           ~ 6 0
21 1RXS J132917.6-472316 Ro* 13 29 18.5921032728 -47 22 50.488736340   13.523 12.468 11.925 10.840 ~ 7 0
22 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1872 0
23 HD 317888 * 17 33 05.0168794056 -33 23 28.451047776 10.81 10.99 10.28 10.06   OB+ 14 0
24 HD 317889 * 17 33 06.7990635120 -33 24 10.787809824   10.98 9.72     K5 12 0
25 [ADK96] J173319-3323 X 17 33 24.2 -33 23 07           ~ 2 0
26 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 230 0
27 NAME Rapid Burster LXB 17 33 24.61 -33 23 19.8           ~ 393 2
28 [JVH94] NGC 6397 15 X 17 39 16.54 -53 43 11.3           ~ 1 0
29 [JVH94] NGC 6397 17 X 17 39 32.92 -53 46 48.7           ~ 1 0
30 2MASS J17400148-5342271 X 17 40 01.48 -53 42 27.2           ~ 1 0
31 [JVH94] NGC 6397 8 X 17 40 10.9 -53 50 34           ~ 2 0
32 [JVH94] NGC 6397 19 X 17 40 14.53 -53 50 31.7           ~ 1 0
33 [JVH94] NGC 6397 18 X 17 40 30.81 -53 47 51.4           ~ 1 0
34 CGKB D QSO 17 40 32.9 -53 43 30           ~ 4 0
35 CGKB B LXB 17 40 41.468 -53 40 04.43           ~ 23 0
36 CGKB C X 17 40 41.5 -53 40 07           ~ 4 0
37 [JVH94] NGC 6397 4d X 17 40 41.56 -53 40 27.7           ~ 1 0
38 Cl* NGC 6397 SAW V12 CV* 17 40 41.597 -53 40 19.30   18.51 17.95 17.88   ~ 22 0
39 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1876 1
40 Cl* NGC 6397 SAW V34 CV* 17 40 42.306 -53 40 28.70   20.02   18.87   ~ 24 0
41 [JVH94] NGC 6397 4a X 17 40 42.47 -53 40 28.6           ~ 1 0
42 V* V1139 Ara CV* 17 40 42.651 -53 40 19.30   19.10   18.52   ~ 21 0
43 [CGC98] NF 3 CV* 17 40 42.722 -53 40 27.53   20.04 19.35 20.21   ~ 16 0
44 Cl* NGC 6397 SAW V13 EB* 17 40 48.978 -53 39 48.62   20.14 19.43 19.14   ~ 10 0
45 2MASS J17405107-5333482 X 17 40 51.0827899440 -53 33 48.326377860           ~ 1 0
46 CGKB E * 17 41 24.1420698360 -53 46 18.579074340           ~ 2 0
47 HD 160177 ** 17 41 27.6346045560 -53 48 10.771523892   10.20 9.36     K1IV/V 29 0
48 CGKB G G 17 41 34.3 -53 31 54           ~ 4 0
49 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 715 0
50 [JVH94] NGC 6752 13 X 19 09 59.88 -59 54 50.6           ~ 1 0
51 [JVH94] NGC 6752 4 X 19 10 04.0 -59 55 28           ~ 3 0
52 [JVH94] NGC 6752 15 X 19 10 04.25 -60 02 54.3           ~ 1 0
53 USNO-A2.0 0225-29896802 * 19 10 04.51 -60 03 18.4           ~ 1 0
54 [JVH94] NGC 6752 20 X 19 10 12.07 -60 06 06.6           ~ 1 0
55 [JVH94] NGC 6752 18 X 19 10 32.92 -60 03 59.8           ~ 1 0
56 [G93] NGC 6752 A AGN 19 10 40.375 -59 58 41.47   21.76   20.97   ~ 11 0
57 [JVH94] NGC 6752 7 X 19 10 51.1 -59 58 51           ~ 2 1
58 Cl* NGC 6752 SAW V27 CV* 19 10 51.138 -59 59 11.92           ~ 13 0
59 [JVH94] NGC 6752 7a X 19 10 51.43 -59 58 56.6           ~ 1 0
60 [JVH94] NGC 6752 22 CV* 19 10 51.505 -59 59 27.10   24.07   23.87   ~ 9 0
61 Cl* NGC 6752 BRS 2 CV* 19 10 51.511 -59 58 56.85           ~ 17 0
62 Cl* NGC 6752 SAW V25 CV* 19 10 51.586 -59 59 01.73   21.09   20.10   ~ 17 0
63 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1894 0
64 [JVH94] NGC 6752 21 X 19 10 52.51 -59 59 01.9           ~ 1 0
65 [G93] NGC 6752 D CV* 19 10 56.005 -59 59 37.33           ~ 11 0
66 HD 178085 PM* 19 10 57.8503449960 -60 16 19.925911668   8.90 8.347   7.660 G1V 48 0
67 [JVH94] NGC 6752 17 X 19 11 20.33 -60 03 18.5           ~ 1 0
68 CD-60 7128 * 19 11 41.6980853232 -60 05 09.214608300   10.56 10.11     ~ 6 0
69 [JVH94] NGC 6752 3 X 19 13 27.1 -59 48 05           ~ 2 0
70 [G93] NGC 6752 C X ~ ~           ~ 2 1
71 [G93] NGC 6752 B X ~ ~           ~ 3 1

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2022.05.24-01:54:58

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