Table 3
Statistics of compact sources I.
| Galaxy | N XRS | N CXB | N GC |
|
N GC−X |
|
R | N r |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
|
|
||||||||
| M 31 | 386 | 194 | 121 | 1.00 | 26 | 1.00 | 2.0′′ | 0.2 |
| Cen A | 231 | 64 | 479 | 0.67 ± 0.03 | 47 | 0.55 ± 0.19 | 2.0′′ | 1.2 |
| M 81 | 220 | 79 | 77 | 0.77 ± 0.09 | 8 | 0.84 ± 0.48 | 3.0′′ | 0.8 |
| Maffei 1 | 38 | 1 | 20 | 1.00 | 4 | 1.00 | 1.0′′ | 0.3 |
| N3379 | 59 | 4 | 61 | 0.80 ± 0.10 | 9 | 0.74 ± 0.39 | 1.0′′ | 0.6 |
| N4697 | 117 | 17 | 441 | 0.85 ± 0.04 | 39 | 0.93 ± 0.31 | 0.8′′ | 1.1 |
| N4278 | 120 | 6 | 266 | 0.69 ± 0.04 | 40 | 0.86 ± 0.29 | 0.6′′ | 1.8 |
| MW | – | – | 150 | 1.00 | 12 | 1.00 | – | – |
|
|
||||||||
| Total | 1171 | 365 | 1615 | – | 185 | – | – | 6.7 |
Notes. Columns are: (1) – Galaxy name. (2) – Total number of resolved X-ray point sources in the study fields. (3) – Predicted number of CXB sources in the study fields above the corresponding sensitivity threshold. (4) – Number of optically identified GCs. (5) – Completeness fraction of GC lists and its 1σ uncertainty, estimated as described in Sect. 3.3. (6) – Number of LMXBs found in GCs. (7) – Completeness fraction and its uncertainty of GC lists with respect to GCs containing LMXBs (see Sect. 3.3). (8) – Search radius to match XRS to GC. (9) – Expected number of random coincidences of X-ray sources with GCs.
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