Wide-sep. lensed QSOs + dual-QSO cand. from CatNorth

Second, these identified groups undergo an automatic filtering process that assesses the intra-group similarity of photometric colours or spectral information when available. These two steps yield 14 760 quasar candidate groups, while retaining all discoverable previously known WSLQs. Third, a visual inspection, guided primarily by the projected geometry of the quasar images and plausible foreground objects, yields the final candidate sample, with a label indicating the candidates' quality.

We have identified a total of 333 new WSLQ candidates with separations ranging from 10 to 56.8 arcsec. By exploiting the available SDSS DR16/DESI DR1 spectroscopic data, we uncovered two novel WSLQ candidate systems, but 331 WSLQ candidates - 45 Grade A, 98 Grade B, and 188 Grade C systems - lack sufficient spectral information. In addition, a sample of 29 dual quasar candidates is presented as a by-product.

When feasible, we plan to secure follow-up spectroscopy and deeper imaging to confirm WSLQs from the above candidates and proceed with pertinent scientific investigations.