Table 7.
Number of contaminants estimated using different published log N − log S relations, in the ULX and HLX samples.
| Survey | Moretti+03 | Georgakakis+08 | Kim+07 | Identified |
|---|---|---|---|---|
| 2SXPS ULXs |  |
 |
 |
171 |
| 2SXPS HLXs |  |
 |
 |
25 |
| 4XMM ULXs |  |
 |
 |
541 |
| 4XMM HLXs |  |
 |
 |
121 |
| CSC2 ULXs |  |
 |
 |
482 |
| CSC2 HLXs |  |
 |
 |
64 |
Notes. Positive and negative errors correspond to the estimates at 10% and 90% of the exclusion radius (3(POSERR + 0.5)) distribution. The last column gives the number of candidates filtered out by our pipeline as background contaminants, or identified as HLX weak candidates.
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