2003ApJ...596.1177E

Query : 2003ApJ...596.1177E

2003ApJ...596.1177E - Astrophys. J., 596, 1177-1196 (2003/October-3)

An extensive census of Hubble Space Telescope counterparts to Chandra X-ray sources in the globular cluster 47 Tucanae. I. Astrometry and photometry.

EDMONDS P.D., GILLILAND R.L., HEINKE C.O. and GRINDLAY J.E.

Abstract (from CDS):

We report in this study of 47 Tucanae the largest number of optical identifications of X-ray sources yet obtained in a single globular cluster. Using deep Chandra ACIS-I imaging and extensive Hubble Space Telescope studies with Wide Field Planetary Camera 2 (WFPC2; including a 120 orbit program giving superb V and I images), we have detected optical counterparts to at least 22 cataclysmic variables (CVs) and 29 chromospherically active binaries (BY Dra and RS CVn systems) in 47 Tuc. These identifications are all based on tight astrometric matches between X-ray sources and objects with unusual (non-main-sequence [non-MS]) optical colors and/or optical variability. Several other CVs and active binaries have likely been found, but these have marginal significance because of larger offsets between the X-ray and optical positions, or colors and variability that are not statistically convincing. These less secure optical identifications are not subsequently discussed in detail. In the U versus U-V color-magnitude diagram (CMD), where the U band corresponds to either F336W or F300W, the CVs all show evidence for blue colors compared with the MS, but most of them fall close to the main sequence in the V versus V-I CMD, showing that the secondary stars dominate the optical light. The X-ray-detected active binaries have magnitude offsets above the MS (in both the U versus U-V or V versus V-I CMDs) that are indistinguishable from those of the much larger sample of optical variables (eclipsing and contact binaries and BY Dra variables) detected in the recent WFPC2 studies of Albrow et al. We also present the results of a new, deeper search for optical companions to millisecond pulsars (MSPs). One possible optical companion to an MSP (47 Tuc T) was found, adding to the two optical companions already known. Finally, we study several blue stars with periodic variability from Albrow et al. that show little or no evidence for X-ray emission. The optical colors of these objects differ from those of 47 Tuc (and field) CVs. An accompanying paper will present time series results for these optical identifications and will discuss X-ray-to-optical flux ratios, spatial distributions, and an overall interpretation of the results.

Abstract Copyright: ∼

Journal keyword(s): Stars: Binaries: General - Galaxy: Globular Clusters: Individual: Name: 47 Tucanae - Stars: Novae, Cataclysmic Variables - Stars: Chromospheres - Techniques: Photometric - X-Rays: Binaries

Nomenclature: Tables 1, 4: [GHE2001] WNNN N=16 added among (Nos W115-W184). Fig.7: Cl* NGC 104 EGH RN (Nos R1-R2).

Simbad objects: 137

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Number of rows : 137
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 CXOGlb J002350.6-720541 X 00 23 50.806 -72 05 41.51           ~ 3 0
2 CXOGlb J002351.9-720429 X 00 23 51.996 -72 04 29.31           ~ 3 0
3 CXOGlb J002353.4-720511 X 00 23 53.548 -72 05 11.20           ~ 3 0
4 CXOGlb J002354.5-720607 X 00 23 54.587 -72 06 07.84           ~ 3 0
5 CXOGlb J002357.6-720542 X 00 23 57.687 -72 05 42.98           ~ 3 0
6 CXOGlb J002357.6-720502 XB* 00 23 57.699 -72 05 01.93           ~ 4 0
7 CXOGlb J002357.8-720452 X 00 23 57.884 -72 04 52.76           ~ 3 0
8 CXOGlb J002358.8-720509 X 00 23 58.988 -72 05 09.70           ~ 3 0
9 CXOGlb J002359.3-720438 CV* 00 23 59.404 -72 04 38.46           ~ 6 0
10 CXOGlb J002359.3-720448 X 00 23 59.434 -72 04 47.79           ~ 4 0
11 CXOGlb J002359.9-720504 X 00 23 59.877 -72 05 04.65           ~ 3 0
12 CXOGlb J002359.9-720531 X 00 23 59.974 -72 05 31.93           ~ 3 0
13 CXOGlb J002359.9-720513 X 00 24 00.043 -72 05 12.85           ~ 3 0
14 CXOGlb J002400.3-720546 X 00 24 00.424 -72 05 46.55           ~ 3 0
15 CXOGlb J002400.9-720453 LXB 00 24 00.968 -72 04 53.18     21.7     ~ 59 0
16 2MASS J00240102-7205542 XB* 00 24 01.03 -72 05 54.3           ~ 4 0
17 CXOGlb J002401.3-720445 X 00 24 01.364 -72 04 45.63           ~ 3 0
18 CXOGlb J002401.4-720441 CV* 00 24 01.434 -72 04 41.72           ~ 8 0
19 CXOGlb J002401.7-720512 X 00 24 01.775 -72 05 12.30           ~ 4 0
20 CXOGlb J002402.1-720542 CV* 00 24 02.141 -72 05 41.94           ~ 15 0
21 CXOGlb J002402.1-720450 CV* 00 24 02.226 -72 04 50.63           ~ 8 0
22 [GHE2001] W99 X 00 24 02.37 -72 05 50.7           ~ 3 0
23 CXOGlb J002402.5-720444 X 00 24 02.522 -72 04 44.24           ~ 4 0
24 CXOGlb J002402.5-720511 CV* 00 24 02.533 -72 05 11.25           ~ 9 0
25 CXOGlb J002402.6-720538 X 00 24 02.597 -72 05 38.41           ~ 4 0
26 CXOGlb J002402.6-720441 X 00 24 02.658 -72 04 41.47           ~ 5 0
27 CXOGlb J002402.8-720449 CV* 00 24 02.806 -72 04 49.04           ~ 10 0
28 CXOGlb J002403.1-720447 CV* 00 24 03.083 -72 04 47.28           ~ 8 0
29 Cl* NGC 104 EGG V9 * 00 24 03.336 -72 04 26.12           ~ 5 0
30 Cl* NGC 104 EGG V8 EB* 00 24 03.464 -72 05 05.20 19.195   18.383   17.541 ~ 11 0
31 CXOGlb J002403.4-720451 LXB 00 24 03.494 -72 04 51.94           ~ 62 1
32 CXOGlb J002403.6-720522 X 00 24 03.516 -72 05 22.54           ~ 4 0
33 CXOGlb J002403.5-720441 X 00 24 03.565 -72 04 41.50           ~ 3 0
34 CXOGlb J002403.6-720459 CV* 00 24 03.703 -72 04 59.03           ~ 8 0
35 CXOGlb J002403.7-720423 CV* 00 24 03.776 -72 04 22.96           ~ 9 0
36 CXOGlb J002403.7-720516 X 00 24 03.784 -72 05 16.90           ~ 2 0
37 CXOGlb J002403.8-720621 CV* 00 24 03.835 -72 06 21.61           ~ 7 0
38 PSR J0024-72F Psr 00 24 03.907 -72 04 42.47           ~ 54 1
39 CXOGlb J002404.1-720420 X 00 24 04.191 -72 04 20.11           ~ 2 0
40 RX J0021.8-7221 LXB 00 24 04.263 -72 04 57.97 18.868   19.772   19.316 ~ 78 0
41 CXOGlb J002404.2-720443 XB* 00 24 04.276 -72 04 43.52           ~ 4 0
42 Cl* NGC 104 EGG V19 EB* 00 24 04.345 -72 05 01.35 21.956   20.137   18.938 ~ 6 0
43 Cl* NGC 104 AGBWF 4-16 * 00 24 04.61 -72 06 06.0 24.07   24.07   23.152 ~ 3 0
44 CXOGlb J002404.6-720434 X 00 24 04.634 -72 04 34.38           ~ 3 0
45 PSR J0023-72O Psr 00 24 04.637 -72 04 53.71           ~ 66 1
46 CXOGlb J002404.8-720446 XB* 00 24 04.902 -72 04 46.19           ~ 4 0
47 Cl* NGC 104 SAW V39 * 00 24 04.913 -72 04 55.36 17.678   17.391   16.45 ~ 39 0
48 CXOGlb J002404.9-720506 CV* 00 24 04.956 -72 05 06.08           ~ 7 0
49 CXOGlb J002404.9-720451 X 00 24 05.007 -72 04 51.27   14.16 12.96     ~ 21 0
50 CXOGlb J002405.1-720502 XB? 00 24 05.056 -72 05 02.77           ~ 7 0
51 CXOGlb J002405.1-720604 XB* 00 24 05.156 -72 06 04.46           ~ 3 0
52 CXOGlb J002405.2-720446 CV* 00 24 05.216 -72 04 46.59     22.3     ~ 12 0
53 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
54 CXOGlb J002405.3-720421 CV* 00 24 05.364 -72 04 21.53           ~ 8 0
55 CXOGlb J002405.3-720511 X 00 24 05.379 -72 05 11.12           ~ 4 0
56 CXOGlb J002405.6-720504 CV* 00 24 05.662 -72 05 04.51           ~ 8 1
57 [GHE2001] W32 CV* 00 24 05.7472103520 -72 04 49.401989364   14.253 12.777   11.930 ~ 9 0
58 CXOGlb J002406.0-720501 X 00 24 05.998 -72 05 01.37           ~ 6 0
59 CXOGlb J002406.0-720346 X 00 24 06.013 -72 03 46.23           ~ 2 0
60 Cl* NGC 104 MAM M54898 CV* 00 24 06.013 -72 04 56.20 19.383   20.411   19.273 ~ 33 0
61 PSR B0021-72W Psr 00 24 06.0580 -72 04 49.088           ~ 87 1
62 CXOGlb J002406.0-720449 Psr 00 24 06.064 -72 04 48.93     22.3     ~ 12 1
63 Cl* NGC 104 MAM M58539 EB* 00 24 06.2184 -72 04 52.168 17.9 17.76 17.71   17.81 ~ 9 0
64 Cl* NGC 104 EGG V52 CV* 00 24 06.26 -72 04 45.9 19.075   18.514   17.899 ~ 3 0
65 Cl* NGC 104 SBG V3 CV* 00 24 06.2943986812 -72 04 45.361338815   13.429 10.622   9.316 ~ 34 0
66 Cl* NGC 104 EGG V23 BY* 00 24 06.4 -72 04 53 17.578   16.985   16.194 ~ 9 0
67 Cl* NGC 104 AGBWF 2-17 BY* 00 24 06.436 -72 04 30.11 17.801   17.338   16.585 ~ 5 0
68 PSR J0024-72H Psr 00 24 06.686 -72 04 06.74           ~ 64 1
69 CXOGlb J002406.8-720512 XB* 00 24 06.869 -72 05 12.29           ~ 5 0
70 CXOGlb J002407.1-720545 CV* 00 24 07.141 -72 05 45.67           ~ 16 0
71 Cl* NGC 104 EGG V24 BY* 00 24 07.224 -72 04 57.39 17.952   17.363   16.599 ~ 6 0
72 CXOGlb J002407.2-720446 X 00 24 07.246 -72 04 46.44           ~ 2 0
73 CXOGlb J002407.3-720519 X 00 24 07.281 -72 05 19.58           ~ 5 0
74 CXOGlb J002407.3-720449 X 00 24 07.376 -72 04 49.41           ~ 8 0
75 CXOGlb J002407.7-720527 CV* 00 24 07.5339229272 -72 05 30.125030460   13.700 11.844   10.740 ~ 10 0
76 CXOGlb J002407.8-720441 XB* 00 24 07.804 -72 04 41.57           ~ 8 0
77 CXOGlb J002407.8-720524 XB* 00 24 07.832 -72 05 24.38           ~ 5 0
78 CXOGlb J002407.9-720454 CV* 00 24 07.924 -72 04 54.75           ~ 8 0
79 PSR J0024-72G Psr 00 24 07.943 -72 04 39.65           ~ 47 1
80 Cl* NGC 104 EGG V29 BY* 00 24 08.163 -72 05 13.23 23.342   21.136   19.734 ~ 6 0
81 CXOGlb J002408.2-720435 CV* 00 24 08.299 -72 04 35.68           ~ 7 0
82 GEN# +2.01040017 X 00 24 08.305 -72 04 31.43   15.24 14.26     ~ 7 0
83 Cl* NGC 104 EGG V27 BY* 00 24 08.496 -72 05 00.23 18.673   18.121   17.403 ~ 14 0
84 PSR B0021-72T Psr 00 24 08.54 -72 04 38.9           ~ 48 1
85 Cl* NGC 104 EGG V41 BY* 00 24 08.757 -72 05 07.56 18.492   17.625   16.921 ~ 5 0
86 PSR B0021-72N Psr 00 24 09.193 -72 04 28.83           ~ 40 1
87 CXOGlb J002409.2-720543 CV* 00 24 09.219 -72 05 43.87           ~ 5 0
88 Cl* NGC 104 EGG V17 EB* 00 24 09.514 -72 05 04.58 20.062   18.994   18.002 ~ 5 0
89 PSR J0023-72U Psr 00 24 09.8325 -72 03 59.667           ~ 64 2
90 CXOGlb J002410.0-720441 CV* 00 24 10.048 -72 04 41.20           ~ 9 0
91 CXOGlb J002410.2-720401 XB* 00 24 10.217 -72 04 01.51           ~ 3 0
92 Cl* NGC 104 EGG V48 * 00 24 10.484 -72 04 59.92 18.533   17.386   16.397 ~ 5 0
93 Cl* NGC 104 AGBWF 4-6 BY* 00 24 10.5 -72 05 06 17.625   17.12   16.385 ~ 8 0
94 CXOGlb J002410.6-720529 XB* 00 24 10.598 -72 05 29.21           ~ 2 0
95 CXOGlb J002410.6-720516 CV* 00 24 10.642 -72 05 16.37           ~ 7 0
96 CXOGlb J002410.7-720425 CV* 00 24 10.763 -72 04 25.71           ~ 13 0
97 CXOGlb J002410.8-720415 X 00 24 10.861 -72 04 15.84           ~ 4 0
98 CXOGlb J002411.0-720620 CV* 00 24 11.090 -72 06 20.04           ~ 8 0
99 PSR J0024-7204E Psr 00 24 11.125 -72 05 20.14           ~ 66 1
100 CXOGlb J002411.6-720503 X 00 24 11.649 -72 05 03.69           ~ 5 0
101 CXOGlb J002411.8-720514 XB* 00 24 11.813 -72 05 14.56           ~ 4 0
102 CXOGlb J002411.8-720443 CV* 00 24 11.915 -72 04 43.84           ~ 6 0
103 Cl* NGC 104 AGBWF 4-2 XB* 00 24 12.017 -72 05 08.06 22.047   20.384   19.103 ~ 6 0
104 Cl* NGC 104 AGBWF 2-18 BY* 00 24 12.56 -72 04 23.6 19.184   18.312   17.376 ~ 6 0
105 CXOGlb J002412.6-720440 X 00 24 12.635 -72 04 40.94           ~ 5 0
106 CXOGlb J002413.4-720451 XB? 00 24 13.464 -72 04 51.13           ~ 4 0
107 CXOGlb J002413.4-720523 XB* 00 24 13.479 -72 05 23.30           ~ 4 0
108 PSR J0024-72D Psr 00 24 13.818 -72 04 43.83           ~ 62 1
109 Cl* NGC 104 AGBWF 3-7 EB* 00 24 14.2860 -72 04 54.745 19.531   19.597   19.657 ~ 3 0
110 Cl* NGC 104 AGBWF 4-5 EB* 00 24 14.6191 -72 05 40.371 18.765   18.643   18.512 ~ 3 0
111 Cl* NGC 104 AGBWF 2-30 * 00 24 14.8416 -72 03 44.793 19.671   21.295   20.895 ~ 4 0
112 Cl* NGC 104 AGBWF 2-8 EB* 00 24 15.1166 -72 03 36.569 19.402   21.277   21.557 ~ 3 0
113 NGC 104 3 * 00 24 15.163 -72 04 43.36 18.877   17.576   16.437 Me 10 0
114 Cl* NGC 104 AGBWF 2-3 EB* 00 24 15.678 -72 04 41.31 16.596   16.194   15.644 ~ 7 0
115 Cl* NGC 104 AGBWF 2-48 CV* 00 24 15.880 -72 04 36.38 21.243       19.02 Me 20 0
116 Cl* NGC 104 AGBWF 3-8 EB* 00 24 16.023 -72 04 51.56 23.685   20.832   19.63 ~ 5 0
117 [GHE2001] W1 EB* 00 24 16.969 -72 04 27.18 18.891   20.137   19.741 ~ 14 1
118 CXOGlb J002417.2-720446 X 00 24 17.228 -72 04 46.06           ~ 3 0
119 CXOGlb J002417.5-720357 X 00 24 17.532 -72 03 57.66           ~ 4 0
120 Cl* NGC 104 AGBWF 4-3 EB* 00 24 18.795 -72 06 02.74 20.046   19.147   18.216 ~ 3 0
121 Cl* NGC 104 AGBWF 3-1 EB* 00 24 19.374 -72 04 31.26 21.567   19.985   18.846 ~ 3 0
122 Cl* NGC 104 AGBWF 3-5 EB* 00 24 25.127 -72 05 07.29 17.426   17.04   16.414 ~ 4 0
123 Cl* NGC 104 AGBWF 3-6 EB* 00 24 25.4577 -72 04 38.204 23.429 22.90 22.929   22.232 ~ 3 0
124 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
125 NGC 2682 OpC 08 51 23.5 +11 48 54           ~ 2528 0
126 Cl* NGC 2682 SAND 1113 RS* 08 51 25.3043953560 +12 02 56.494997844 15.299 14.78 13.736     ~ 71 0
127 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
128 [CGC98] NF 1 * 17 40 40.659 -53 40 19.85   19.08   18.98   ~ 4 0
129 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
130 [CGC98] NF 3 CV* 17 40 42.722 -53 40 27.53   20.04 19.35 20.21   ~ 16 0
131 PSR J1740-5340 Psr 17 40 44.589 -53 40 40.90   17.43   16.25   ~ 157 2
132 Cl* NGC 6397 SAW V16 El* 17 40 44.615 -53 40 41.59   17.36 16.65     ~ 22 1
133 [GHE2001b] U11 CV* 17 40 45.781 -53 40 41.52   24.26   23.65   ~ 11 0
134 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
135 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
136 Cl* NGC 104 EGH R2 RR* ~ ~           ~ 2 0
137 Cl* NGC 104 EGH R1 RR* ~ ~           ~ 2 0

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