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Table 1
Number of initial hot sds, WDs, CVs, and OB targets used for defining the procedure in Sect. 3, including the number of objects with available data in galex, 2mass and SuperCOSMOS.
| Hot sds | WDs | CVs | OBs | |
|
|
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| Initial nums. in cats. | 2430 | 9277 | 1578 | 9123 |
| 2mass | 1985 (82%) | 680 (7%) | 956 (61%) | 7504 (82%) |
| galex | 1578 (65%) | 5798 (62%) | 460 (29%) | 42 (0.46%) |
| SuperCOSMOS | 2243 (92%) | 8636 (93%) | 1145 (73%) | 5049 (55%) |
| 2mass+galex | 1246 (51%) | 445 (5%) | 292 (18%) | 40 (0.44%) |
| 2mass+galex+SuperC. | 1162 (48%) | 421 (4%) | 274 (17%) | 33 (0.36%) |
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