2006A&A...445..155W

Query : 2006A&A...445..155W

2006A&A...445..155W - Astronomy and Astrophysics, volume 445155-165 (2006/1-1)

XMM-Newton X-ray and optical observations of the globular clusters M 55 and NGC 3201.

WEBB N.A., WHEATLEY P.J. and BARRET D.

Abstract (from CDS):

We have observed two low concentration Galactic globular clusters with the X-ray observatory XMM-Newton. We detect 47 faint X-ray sources in the direction of M 55 and 62 in the field of view of NGC 3201. Using the statistical Log N - Log S relationship of extragalactic sources derived from XMM-Newton Lockman Hole observations, to estimate the background source population, we estimate that very few of the sources (1.5±1.0) in the field of view of M 55 actually belong to the cluster. These sources are located in the centre of the cluster as we expect if the cluster has undergone mass segregation. NGC 3201 has approximately 15 related sources, which are centrally located but are not constrained to lie within the half mass radius. The sources belonging to this cluster can lie up to 5 core radii from the centre of the cluster which could imply that this cluster has been perturbed. Using X-ray (and optical, in the case of M 55) colours, spectral and timing analysis (where possible) and comparing these observations to previous X-ray observations, we find evidence for sources in each cluster that could be cataclysmic variables, active binaries, millisecond pulsars and possible evidence for a quiescent low mass X-ray binary with a neutron star primary, even though we do not expect any such objects in either of the clusters, due to their low central concentrations. The majority of the other sources are background sources, such as AGN.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: globular clusters: individual: M 55, NGC 3201 - X-rays: general - stars: binaries: general - stars: variables: general

VizieR on-line data: <Available at CDS (J/A+A/445/155): table2.dat table3.dat>

Nomenclature: Table 2: [WWS2006] M 55 NN (Nos 1-47). Table 3: [WWS2006] NGC 3201 NN (Nos 1-62).

Simbad objects: 124

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Number of rows : 124
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 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 [WWS2006] NGC 3201 54 X 10 16 33.37 -46 26 30.5           ~ 1 0
3 [WWS2006] NGC 3201 5 X 10 16 37.66 -46 29 24.7           ~ 1 0
4 UCAC4 218-049126 * 10 16 41.8231005562 -46 26 29.282268891   13.155 11.948 11.622   ~ 3 0
5 [WWS2006] NGC 3201 70 X 10 16 42.89 -46 24 37.2           ~ 1 0
6 [WWS2006] NGC 3201 2 X 10 16 47.23 -46 14 49.2           ~ 1 0
7 [WWS2006] NGC 3201 10 X 10 16 47.76 -46 15 16.5           ~ 1 0
8 [WWS2006] NGC 3201 31 X 10 16 50.58 -46 28 35.9           ~ 1 0
9 [WWS2006] NGC 3201 50 X 10 16 51.55 -46 32 13.1           ~ 1 0
10 [WWS2006] NGC 3201 1 X 10 16 59.90 -46 36 38.9           ~ 1 0
11 [WWS2006] NGC 3201 53 X 10 17 00.35 -46 36 42.8           ~ 1 0
12 2MASS J10170036-4622371 X 10 17 00.36 -46 22 37.2           ~ 1 0
13 [WWS2006] NGC 3201 25 X 10 17 02.85 -46 24 03.9           ~ 2 0
14 2MASS J10170294-4613283 SB* 10 17 02.9317627800 -46 13 28.294900896   12.49 10.97     ~ 6 0
15 [WWS2006] NGC 3201 29 X 10 17 03.64 -46 27 15.5           ~ 1 0
16 [WWS2006] NGC 3201 16 X 10 17 04.28 -46 18 50.9           ~ 3 0
17 [WWS2006] NGC 3201 11 X 10 17 05.97 -46 15 36.1           ~ 1 0
18 [WWS2006] NGC 3201 59 X 10 17 08.71 -46 29 47.3           ~ 2 0
19 [WWS2006] NGC 3201 51 X 10 17 12.40 -46 35 54.5           ~ 1 0
20 [WWS2006] NGC 3201 17 X 10 17 13.26 -46 19 25.6           ~ 1 0
21 [WWS2006] NGC 3201 23 X 10 17 15.63 -46 22 54.1           ~ 3 0
22 NGC 3201 1202 RR* 10 17 17.6584921282 -46 25 06.188903854   15.34 14.59     ~ 16 0
23 2MASS J10172232-4631340 X 10 17 22.33 -46 31 34.1           ~ 2 0
24 [WWS2006] NGC 3201 43 X 10 17 22.86 -46 19 23.5           ~ 1 0
25 CD-45 5933 * 10 17 23.3137768968 -46 12 17.957447460   11.4 11.0     ~ 2 0
26 [WWS2006] NGC 3201 12 X 10 17 28.11 -46 16 03.5           ~ 1 0
27 [WWS2006] NGC 3201 46 X 10 17 29.42 -46 26 45.0           ~ 2 0
28 [WWS2006] NGC 3201 21 X 10 17 31.72 -46 21 15.7           ~ 1 0
29 [WWS2006] NGC 3201 66 X 10 17 32.07 -46 18 10.6           ~ 1 0
30 [WWS2006] NGC 3201 33 X 10 17 32.20 -46 31 57.6           ~ 2 0
31 [WWS2006] NGC 3201 64 X 10 17 32.48 -46 17 29.5           ~ 1 0
32 [WWS2006] NGC 3201 19 X 10 17 33.26 -46 20 03.5           ~ 1 0
33 [WWS2006] NGC 3201 44 X 10 17 35.68 -46 21 11.3           ~ 1 0
34 [WWS2006] NGC 3201 18 X 10 17 35.76 -46 19 39.8           ~ 1 0
35 [WWS2006] NGC 3201 26 X 10 17 36.00 -46 24 19.5           ~ 3 0
36 Cl* NGC 3201 CWFD 3-215 * 10 17 36.15 -46 24 22.2   14.74 13.53     ~ 3 0
37 Cl* NGC 3201 CWFD 3-216 * 10 17 36.25 -46 24 18.3   14.26 12.90     ~ 3 0
38 NGC 3201 GlC 10 17 36.82 -46 24 44.9           ~ 1001 0
39 [WWS2006] NGC 3201 14 X 10 17 37.70 -46 17 29.7           ~ 1 0
40 [WWS2006] NGC 3201 68 X 10 17 37.72 -46 23 36.3           ~ 1 0
41 Cl* NGC 3201 CWFD 3-248 RG* 10 17 38.4554407512 -46 23 40.817942772   15.743 14.704     ~ 9 0
42 [WWS2006] NGC 3201 58 X 10 17 39.60 -46 22 03.7           ~ 2 0
43 [WWS2006] NGC 3201 45 X 10 17 41.08 -46 21 22.5           ~ 2 0
44 [WWS2006] NGC 3201 40 X 10 17 41.92 -46 39 22.6           ~ 1 0
45 [WWS2006] NGC 3201 72 X 10 17 45.66 -46 30 35.9           ~ 1 0
46 [WWS2006] NGC 3201 55 X 10 17 46.74 -46 16 20.6           ~ 1 0
47 [WWS2006] NGC 3201 30 X 10 17 46.85 -46 28 15.0           ~ 2 0
48 [WWS2006] NGC 3201 7 X 10 17 50.21 -46 11 56.0           ~ 1 0
49 [WWS2006] NGC 3201 34 X 10 17 50.25 -46 31 57.6           ~ 1 0
50 [WWS2006] NGC 3201 22 X 10 17 50.54 -46 21 32.9           ~ 3 0
51 Cl* NGC 3201 CWFD 3-351 * 10 17 50.8338457296 -46 18 07.324783416   15.67 14.93     ~ 3 0
52 [WWS2006] NGC 3201 63 X 10 17 51.18 -46 17 03.3           ~ 1 0
53 2MASS J10175626-4633118 * 10 17 56.2639900680 -46 33 11.764881936           ~ 2 0
54 [WWS2006] NGC 3201 24 X 10 17 58.33 -46 23 17.0           ~ 1 0
55 [WWS2006] NGC 3201 37 X 10 17 58.81 -46 35 11.5           ~ 1 0
56 [WWS2006] NGC 3201 36 X 10 18 01.57 -46 33 15.4           ~ 1 0
57 [WWS2006] NGC 3201 52 X 10 18 02.11 -46 36 22.7           ~ 1 0
58 [WWS2006] NGC 3201 57 X 10 18 02.61 -46 20 54.9           ~ 1 0
59 [WWS2006] NGC 3201 42 X 10 18 04.76 -46 23 40.8           ~ 1 0
60 [WWS2006] NGC 3201 15 X 10 18 09.13 -46 18 32.6           ~ 1 0
61 [WWS2006] NGC 3201 41 * 10 18 10.8585561696 -46 14 07.537090632           ~ 1 0
62 [WWS2006] NGC 3201 32 X 10 18 12.08 -46 28 36.5           ~ 1 0
63 [WWS2006] NGC 3201 9 X 10 18 13.00 -46 14 47.2           ~ 2 0
64 [WWS2006] NGC 3201 65 X 10 18 19.01 -46 17 55.5           ~ 1 0
65 [WWS2006] NGC 3201 6 * 10 18 25.4238735888 -46 35 29.158373760           ~ 1 0
66 [WWS2006] NGC 3201 27 X 10 18 27.54 -46 26 03.5           ~ 1 0
67 HD 89493 * 10 18 37.6274 -46 16 52.992   9.23 8.87     F5V 10 0
68 [WWS2006] NGC 3201 62 X 10 18 43.83 -46 15 57.4           ~ 1 0
69 [WWS2006] NGC 3201 20 X 10 18 52.44 -46 21 05.5           ~ 1 0
70 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
71 M 80 GlC 16 17 02.41 -22 58 33.9           ~ 780 0
72 SAX J1808.4-3658 LXB 18 08 27.58 -36 58 43.9           ~ 1051 0
73 [WWS2006] M 55 25 X 19 39 05.34 -30 52 41.2           ~ 2 0
74 [WWS2006] M 55 31 X 19 39 05.63 -31 00 25.5           ~ 2 0
75 [WWS2006] M 55 44 X 19 39 14.01 -30 58 49.2           ~ 1 0
76 [WWS2006] M 55 18 X 19 39 16.28 -31 02 11.1           ~ 1 0
77 [WWS2006] M 55 48 X 19 39 16.66 -31 05 41.1           ~ 1 0
78 [WWS2006] M 55 27 X 19 39 19.35 -30 46 59.7           ~ 1 0
79 [WWS2006] M 55 23 X 19 39 20.68 -31 05 33.8           ~ 1 0
80 2MASS J19392639-3052399 X 19 39 26.40 -30 52 39.9           ~ 1 0
81 [WWS2006] M 55 46 X 19 39 31.25 -31 02 39.4           ~ 1 0
82 [WWS2006] M 55 36 X 19 39 34.83 -31 09 37.5           ~ 1 0
83 [WWS2006] M 55 15 X 19 39 36.78 -30 58 56.9           ~ 1 0
84 [WWS2006] M 55 7 X 19 39 38.14 -30 54 04.6           ~ 1 0
85 [WWS2006] M 55 43 X 19 39 38.26 -30 57 08.2           ~ 1 0
86 [WWS2006] M 55 16 X 19 39 40.44 -31 01 31.5           ~ 1 0
87 [WWS2006] M 55 9 X 19 39 41.92 -30 55 45.9           ~ 3 0
88 [WWS2006] M 55 35 X 19 39 42.75 -31 10 57.8           ~ 1 0
89 [WWS2006] M 55 3 X 19 39 44.00 -30 50 43.0           ~ 1 0
90 [WWS2006] M 55 14 X 19 39 45.77 -30 57 40.1           ~ 4 0
91 [WWS2006] M 55 19 X 19 39 46.46 -31 02 26.9           ~ 2 0
92 [WWS2006] M 55 40 X 19 39 46.74 -30 48 42.2           ~ 1 0
93 [WWS2006] M 55 28 X 19 39 48.21 -30 48 17.4           ~ 1 0
94 [WWS2006] M 55 33 X 19 39 49.26 -31 09 16.3           ~ 1 0
95 Cl* NGC 6809 KPT B1 Q? 19 39 49.81 -30 53 19.6     20.40     ~ 3 0
96 [WWS2006] M 55 39 X 19 39 49.82 -30 53 21.6           ~ 1 0
97 [WWS2006] M 55 5 X 19 39 50.40 -30 50 47.2           ~ 1 0
98 [WWS2006] M 55 17 X 19 39 55.69 -31 02 05.0           ~ 7 0
99 [WWS2006] M 55 41 X 19 39 55.79 -30 52 39.1           ~ 1 0
100 [WWS2006] M 55 21 * 19 39 57.0001371480 -31 03 08.116309872           ~ 2 0
101 [WWS2006] M 55 42 X 19 39 57.64 -30 56 13.8           ~ 4 0
102 M 55 GlC 19 39 59.71 -30 57 53.1     6.49     ~ 913 0
103 [WWS2006] M 55 20 X 19 40 03.36 -31 02 41.6           ~ 3 0
104 [WWS2006] M 55 12 X 19 40 04.75 -30 56 46.8           ~ 3 0
105 Cl* NGC 6809 KPT 1 CV* 19 40 08.40 -30 58 48.8   23.2 22     ~ 10 2
106 [WWS2006] M 55 13 X 19 40 08.96 -30 56 57.3           ~ 3 0
107 2MASS J19401345-3059453 X 19 40 13.45 -30 59 45.3           ~ 3 0
108 [WWS2006] M 55 37 X 19 40 13.80 -30 46 56.3           ~ 1 0
109 [WWS2006] M 55 4 X 19 40 14.76 -31 11 27.7           ~ 1 0
110 [WWS2006] M 55 26 * 19 40 19.7939912040 -31 02 26.904563412           ~ 1 0
111 [WWS2006] M 55 47 X 19 40 23.55 -31 04 52.9           ~ 1 0
112 [WWS2006] M 55 8 X 19 40 26.43 -30 54 17.0           ~ 1 0
113 [WWS2006] M 55 1 X 19 40 29.04 -31 09 54.4           ~ 1 0
114 [WWS2006] M 55 34 X 19 40 29.88 -31 09 50.3           ~ 1 0
115 [WWS2006] M 55 24 X 19 40 31.87 -31 07 46.0           ~ 1 0
116 [WWS2006] M 55 49 X 19 40 31.960 -31 06 04.79           ~ 2 0
117 [WWS2006] M 55 32 X 19 40 39.67 -31 08 15.0           ~ 1 0
118 [WWS2006] M 55 22 X 19 40 41.98 -31 03 58.3           ~ 2 0
119 [WWS2006] M 55 11 X 19 40 42.35 -30 56 30.1           ~ 3 0
120 [JVH96] NGC 6809 11 X 19 40 44.4 -30 58 53           ~ 3 0
121 [WWS2006] M 55 38 X 19 40 44.85 -30 51 21.4           ~ 1 0
122 [WWS2006] M 55 10 X 19 40 50.85 -30 55 54.3           ~ 2 0
123 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 854 3
124 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1

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