2012ApJ...756..147M


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.01CEST12:02:14

2012ApJ...756..147M - Astrophys. J., 756, 147 (2012/September-2)

X-ray binaries in the ultrahigh encounter rate globular cluster NGC 6388.

MAXWELL J.E., LUGGER P.M., COHN H.N., HEINKE C.O., GRINDLAY J.E., BUDAC S.A., DRUKIER G.A. and BAILYN C.D.

Abstract (from CDS):

We report the results of a joint Chandra Hubble Space Telescope study of the X-ray binary (XRB) population in the massive, high-density globular cluster NGC 6388. NGC 6388 has one of the highest predicted XRB production rates of any Galactic cluster. We detected a large population of 61 Chandra sources within the half-mass radius with LX> 5x1030 erg/s. From the X-ray colors, luminosities, (lack of) variability, and spectral fitting, we identify five as likely quiescent low-mass X-ray binaries. Due to the extremely crowded nature of the core of NGC 6388, finding optical identifications to Chandra sources is challenging. We have identified four blue, optically variable counterparts to spectrally hard X-ray sources, evidence that these are bright cataclysmic variables (CVs). One showed variability of 2 mag in V, indicative of a dwarf nova eruption. One other likely CV is identified by its X-ray spectrum (partial covering with high NH) and strong variability, making five likely CVs identified in this cluster. The relatively bright optical magnitudes of these sources put them in the same class as CV1 in M15 and the brightest CVs in 47 Tuc.

Abstract Copyright:

Journal keyword(s): globular clusters: individual: NGC 6388 - novae, cataclysmic variables - X-rays: binaries

Nomenclature: Table 4, col(1): [MLC2012] CX NN (Nos 1-61) = Table 4, col(2): CXOGlb JHHMMSS.s+DDMMSS N=61.

Simbad objects: 76

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Number of rows : 76

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 NGC 104 GlC 00 24 05.359 -72 04 53.20   5.78 4.09     ~ 3534 0
2 NGC 5139 GlC 13 26 47.28 -47 28 46.1   6.12 5.33     ~ 2987 0
3 M 5 GlC 15 18 33.22 +02 04 51.7   7.34 5.95     ~ 1764 0
4 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 614 0
5 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1671 0
6 M 62 GlC 17 01 12.60 -30 06 44.5   8.55 7.39     ~ 508 0
7 NGC 6366 GlC 17 27 44.24 -05 04 47.5           ~ 258 0
8 CXOGlb J173613.9-444415 X 17 36 13.911 -44 44 15.08           ~ 1 0
9 CXOGlb J173614.7-444430 X 17 36 14.761 -44 44 31.38           ~ 1 0
10 CXOGlb J173615.7-444415 CV* 17 36 15.751 -44 44 15.02           ~ 1 0
11 CXOGlb J173616.0-444408 X 17 36 16.036 -44 44 08.14           ~ 1 0
12 CXOGlb J173616.0-444421 X 17 36 16.079 -44 44 21.33           ~ 1 0
13 CXOGlb J173616.2-444415 X 17 36 16.233 -44 44 15.43           ~ 1 0
14 CXOGlb J173616.5-444416 X 17 36 16.579 -44 44 16.52           ~ 1 0
15 CXOGlb J173616.5-444410 X 17 36 16.593 -44 44 10.63           ~ 1 0
16 CXOGlb J173616.6-444423 CV* 17 36 16.625 -44 44 23.43           ~ 2 0
17 CXOGlb J173616.6-444421 X 17 36 16.689 -44 44 21.94           ~ 1 0
18 CXOGlb J173616.7-444400 X 17 36 16.752 -44 44 00.39           ~ 1 0
19 CXOGlb J173616.8-444406 X 17 36 16.842 -44 44 06.59           ~ 1 0
20 [CKC2010] 16 X 17 36 16.872 -44 44 12.85           ~ 2 0
21 CXOGlb J173616.9-444409 LXB 17 36 16.941 -44 44 09.90           ~ 2 0
22 CXOGlb J173616.9-444419 X 17 36 16.950 -44 44 19.98           ~ 1 0
23 CXOGlb J173616.9-444411 X 17 36 16.969 -44 44 11.79           ~ 1 0
24 [CKC2010] 8 X 17 36 17.010 -44 44 03.06           ~ 2 0
25 CXOGlb J173617.0-444405 X 17 36 17.069 -44 44 05.94           ~ 1 0
26 CXOGlb J173617.0-444358 X 17 36 17.074 -44 43 58.25           ~ 1 0
27 CXOGlb J173617.0-444359 X 17 36 17.083 -44 43 59.86           ~ 1 0
28 CXOGlb J173617.0-444412 X 17 36 17.088 -44 44 12.57           ~ 1 0
29 CXOGlb J173617.0-444329 X 17 36 17.088 -44 43 29.88           ~ 1 0
30 CXOGlb J173617.0-444351 X 17 36 17.091 -44 43 51.02           ~ 1 0
31 CXOGlb J173617.1-444408 X 17 36 17.142 -44 44 08.70           ~ 1 0
32 CXOGlb J173617.1-444413 X 17 36 17.158 -44 44 13.07           ~ 1 0
33 CXOGlb J173617.1-444401 CV* 17 36 17.161 -44 44 01.92           ~ 2 0
34 CXOGlb J173617.1-444407 CV* 17 36 17.188 -44 44 07.61           ~ 4 0
35 CXOGlb J173617.2-444416 X 17 36 17.235 -44 44 16.86           ~ 1 0
36 CXOGlb J173617.2-444410 CV* 17 36 17.243 -44 44 10.38           ~ 2 0
37 CXOGlb J173617.2-444341 X 17 36 17.246 -44 43 41.74           ~ 1 0
38 CXOGlb J173617.2-444415 X 17 36 17.247 -44 44 15.09           ~ 1 0
39 CXOGlb J173617.3-444438 X 17 36 17.300 -44 44 38.00           ~ 1 0
40 [CKC2010] 7 X 17 36 17.312 -44 44 07.10           ~ 4 0
41 CXOGlb J173617.3-444421 X 17 36 17.323 -44 44 21.27           ~ 1 0
42 [CKC2010] 17 X 17 36 17.325 -44 43 57.21           ~ 2 0
43 CXOGlb J173617.3-444408 LXB 17 36 17.332 -44 44 08.36           ~ 4 0
44 [CKC2010] 13 X 17 36 17.346 -44 43 53.73           ~ 2 0
45 CXOGlb J173617.3-444359 X 17 36 17.363 -44 43 59.24           ~ 1 0
46 [CKC2010] 15 X 17 36 17.401 -44 44 03.19           ~ 2 0
47 IGR J17361-4441 gam 17 36 17.418 -44 44 05.98           ~ 24 0
48 CXOGlb J173617.4-444410 X 17 36 17.440 -44 44 10.17           ~ 1 0
49 NGC 6388 GlC 17 36 17.461 -44 44 08.34   7.40       ~ 798 1
50 CXOGlb J173617.5-444357 LXB 17 36 17.520 -44 43 57.13           ~ 1 0
51 CXOGlb J173617.5-444413 X 17 36 17.550 -44 44 13.88           ~ 1 0
52 CXOGlb J173617.5-444406 X 17 36 17.558 -44 44 06.64           ~ 1 0
53 CXOGlb J173617.5-444402 X 17 36 17.592 -44 44 02.16           ~ 1 0
54 CXOGlb J173617.6-444404 X 17 36 17.661 -44 44 04.89           ~ 1 0
55 CXOGlb J173617.6-444408 X 17 36 17.676 -44 44 08.84           ~ 1 0
56 CXOGlb J173617.6-444416 LXB 17 36 17.683 -44 44 16.78           ~ 2 0
57 CXOGlb J173617.8-444411 X 17 36 17.849 -44 44 11.14           ~ 1 0
58 CXOGlb J173617.8-444344 X 17 36 17.863 -44 43 44.67           ~ 1 0
59 CXOGlb J173618.0-444412 X 17 36 18.026 -44 44 12.70           ~ 1 0
60 [CKC2010] 14 X 17 36 18.053 -44 44 04.30           ~ 3 0
61 CXOGlb J173618.0-444332 X 17 36 18.099 -44 43 32.12           ~ 1 0
62 CXOGlb J173618.1-444419 X 17 36 18.152 -44 44 19.24           ~ 1 0
63 CXOGlb J173618.1-444359 LXB 17 36 18.184 -44 43 59.53           ~ 2 0
64 CXOGlb J173618.2-444403 X 17 36 18.210 -44 44 03.20           ~ 1 0
65 CXOGlb J173618.3-444434 X 17 36 18.308 -44 44 34.22           ~ 1 0
66 CXOGlb J173618.4-444408 X 17 36 18.465 -44 44 08.38           ~ 1 0
67 CXOGlb J173618.5-444412 X 17 36 18.521 -44 44 12.24           ~ 1 0
68 CXOGlb J173618.5-444415 X 17 36 18.555 -44 44 15.57           ~ 1 0
69 CXOGlb J173618.9-444358 X 17 36 18.959 -44 43 58.08           ~ 1 0
70 CXOGlb J173619.0-444341 X 17 36 19.002 -44 43 41.79           ~ 1 0
71 NGC 6397 GlC 17 40 42.09 -53 40 27.6   7.39 5.17     ~ 1792 1
72 M 28 GlC 18 24 32.89 -24 52 11.4           ~ 658 0
73 NGC 6752 GlC 19 10 52.11 -59 59 04.4   6.96 6.28     ~ 1802 0
74 M 15 GlC 21 29 58.33 +12 10 01.2   3       ~ 2895 0
75 M 30 GlC 21 40 22.12 -23 10 47.5     7.10     ~ 909 0
76 NAME Galactic Ridge ? ~ ~           ~ 424 1

    Equat.    Gal    SGal    Ecl

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2020.06.01-12:02:14

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