Open Access
Table A.1.
Number of X-ray training sample sources (from 4XMM and CSC2) having secure counterparts in each of the three optical/IR catalogues considered here. The numbers in brackets are for the highest quality sub-sample.
| O/IR Catalogue | N4XMM | NCSC2 | |
|---|---|---|---|
| LS10 | 39636 (32900) | 5888 (5643) | |
| Gaia EDR3 | 27219 (26129) | 3477 (3379) | |
| CatWISE2020 | 44218 (40399) | 6204 (5707) |
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