Open Access
Table 1.
Overview of the selection criteria used to identify lensed quasar candidates.
| Step | Selection | Candidates |
|---|---|---|
| 1 | Parent samples from Section 2.1 | 86 792 741 |
| 2 | Sources with a neighbor within 2″ | 7 193 353 |
| or available spectroscopic data | ||
| 3 | S/N (g, r, i, z, y) > 5 | 6 568 040 |
| 4 | Detection in X-ray, IR, or radio | 1 929 190 |
| 5 | i-band Kron radius >  |
710 966 |
| 6 | Network classification | 18 300 |
| 7 | Astrometric information | 13 831 |
| • Astrometric excess noise < 10 mas | ||
| • Proper motion significance < 10σ | ||
| 8 | Grade A and B classifications from | 42 |
| the visual check detailed in Section 4.6 |
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