Table 6
UV, optical and infrared magnitudes of possible associations to XRT-detected sources.
| uvw2 | u | b | v | ||||
| # | Name | Catalogue | Offset (′′) | B | V | R | I |
| J | H | K | |||||
|
|
|||||||
| 2 | AX J1504.6–5824 | UVOT | 3.9 | ... | ... | 19.3 ± 0.1 | 17.8 ± 0.1 |
| NOMAD/USNO-B1 | 3.7 | 18.46 | 17.22 | 16.41/16.87 | 15.62 | ||
| 2MASS | 3.9 | 13.72 | 13.14 | 12.77 | ... | ||
| 11 | AX J1717.2–3718 | 2MASS | 2.2 | 17.62 | 15.70 | 13.52 | ... |
| 13 | AX J1720.8–3710+ | UVOT | 4.0 | 15.02 ± 0.02 | ... | ... | ... |
| NOMAD/USNO-B1 | 3.9 | 12.14/11.97 | 11.81 | 11.64/11.62 | 11.47 | ||
| 2MASS | 3.8 | 9.90 | 9.55 | 9.44 | ... | ||
| 16 | AX J1738.4–2902+ | UVOT | 0.2 | 14.82 ± 0.01 | ... | ... | ... |
| NOMAD/USNO-B1 | 0.2 | 12.21/11.67 | 11.20 | 10.70/10.64 | 10.22 | ||
| 2MASS | 0.4 | 9.39 | 8.92 | 8.82 | ... | ||
| 17 | AX J1739.5–2730 | NOMAD/USNO-B1 | 3.3 | 19.43 | ... | 17.34/17.98 | ... |
| 19 | AX J1742.6–2901+ | UVOT | 2.8 | ... | 18.55 ± 0.06 | ... | ... |
| NOMAD/USNO-B1 | 2.4 | 17.96/16.93 | 14.25 | 12.66/12.54 | 10.28 | ||
| 2MASS | 2.5 | 8.11 | 7.27 | 6.73 | ... | ||
| 29 | AX J1846.0–0231 | 2MASS | 3.7 | 14.52 | 12.84 | 12.20 | ... |
| 30 | AX J1846.1–0239 | 2MASS | 0.8 | 14.96 | 12.84 | 10.44 | ... |
| 2MASS | 3.6 | 13.45 | 10.94 | 10.63 | ... | ||
| NOMAD/USNO-B1 | 4.1 | 21.01/20.00 | ... | 18.98/18.15 | 17.26 | ||
| 2MASS | 3.9 | 15.27 | 14.42 | 12.53 | ... | ||
Notes. We searched for possible counterparts within the 90% XRT error radii. The fourth column represents the offset between the centres of the possible counterparts and the XRT positions. Quoted UV/optical magnitudes were taken either from Swift/UVOT data (uvw2, u,b,v), the Naval Observatory Merged Astrometric Dataset (NOMAD; Zacharias et al. 2004, V-band) or the USNO-B1.0 catalogue (Monet et al. 2003, BRI), while the infrared magnitudes come from the 2MASS all-sky catalogue of point sources (Cutri et al. 2003, JHK). All catalogue magnitudes are given without errors and rounded to two decimal places. Sources marked by a plus-symbol may be associated with ROSAT objects (see text and Table 7) and the position of one of these is also consistent with a radio source (AX J1742.6–2901; see text).
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