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Table 2.
CLQ sample selection cuts.
| Selection | Total | Changed class |
|---|---|---|
| SDSS objects | 1 053 144 | ... |
| GALAXY or QSO | 954 447 | ... |
| 0.1 < z < 0.4 | 439 110 | ... |
| Repeatedly observed objects | 24 782 | 184 |
| Selected by algorithm | 941 | 38 |
| CLQs (new) | 6 (4) | 3 (1) |
Notes. The sample was reduced to a manually manageable size with a series of cuts from top to bottom. The column marked ‘Changed class’ indicates objects that changed object classification between GALAXY and QSO, or vice verse, in the same way as the sample selection by Ruan et al. (2016).
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