Table 2.
Properties of galaxies and statistics of their X-ray source populations.
| Name | Date | Cycle | # | Exposure |  |
Nsrc |  |
 |
M* | |
|---|---|---|---|---|---|---|---|---|---|---|
| (ks) | (1035 erg s−1) | (1010 M⊙) | ||||||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | |
| NGC 5236 (M 83) | 23/12/2010–28/12/2011 | 12 | 10 | 729.63 | 3.0 | 276 | 116 | 14 | 2.5 | |
| NGC 5194 (M 51) | 09/09/2012–10/10/2012 | 13 | 7 | 745.33 | 5.8 | 245 | 105 | 5 | 4.1 | |
| NGC 5457 (M 101) | 19/01/2004–01/01/2005 | 5 | 24 | 952.01 | 6.3 | 221 | 89 | 11 | 2.0 | |
| NGC 3031 (M 81) | 26/05/2005–06/07/2005 | 6 | 15 | 175.92 | 3.5 | 161 | 50 | 2 | 5.3 | |
| NGC 5128 (Cen A) | 22/03/2007–30/05/2007 | 8 | 6 | 561.72 | 11.7 | 286 | 88 | 2 | 3.6 | |
| NGC 3115 | 18/01/2012–06/04/2012 | 13 | 8 | 985.40 | 7.7 | 136 | 32 | 0 | 6.9 | |
| NGC 3379 | 23/01/2006–10/01/2007 | 7 | 4 | 305.53 | 20.1 | 87 | 30 | 1 | 5.8 | |
| NGC 4278 | 16/03/2006–20/04/2007 | 7 | 5 | 433.30 | 36.0 | 244 | 92 | 2 | 6.0 | |
| NGC 4697 | 26/12/2003–18/08/2004 | 5 | 4 | 153.70 | 34.7 | 102 | 38 | 2 | 6.0 |
Notes. (1) Galaxy name. (2) Time interval of observations. (3) Chandra cycle during which most of observations were made. (4) and (5) Total number of observations and their exposure time. Full information about archival data used in this work are available in Appendix A. (6) X-ray luminosity of faintest source detected in combined data. For computing this luminosity, an absorbed black-body model was used with temperature kT = 60 eV and absorption column density computed as described in Sect. 5.1. (7) Total number of detected sources (see Sect. 3.1). (8) Total number of sources classified as soft according to the method described in Sect. 4, and having ≥20 net counts. (9) Number of SSSs located to the left of the stable hydrogen burning boundary in Fig. 5 (see Sect. 6.1 and Table C.1). (10) Stellar mass within the spatial region used for source detection.
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