Table 1
Eight known WSLQs and their basic properties.
| No. | System | zs | z1 | sepmax (arcsec) |
N | CatNorth imgs |
Discoverable | Brightest Image (mag) |
Notes / Refs |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SDSS J1004+4112 | 1.734 | 0.68 | 14.62 | 5 | 2 | Yes | 19.73 | Inada et al. (2003, 2005) |
| 2 | SDSS J1029+2623 | 2.197 | 0.596 | 22.5 | 3 | 2 | Yes | 18.85 | Inada et al. (2006), Oguri et al. (2008) |
| 3 | SDSS J1326+4806 | 2.08 | 0.396 | 21.06 | 2 | 2 | Yes | 20.23 | Shu et al. (2019) |
| 4 | GraL J165105.3–041725 | 1.451 | 0.591 | 10.1 | 4 | 2 | Yes | 19.6** | Stern et al. (2021) |
| 5 | SDSS J2222+2745 | 2.805 | 0.49 | 15.1 | 6 | 0 | No | 20.65 | Dahle et al. (2013) |
| 6 | SDSS J0909+4449 | 2.788 | 0.9* | 13.86 | 3 | 0 | No | 21.58 | Shu et al. (2018) |
| 7 | COOL J0542–2125 | 1.84 | 0.61 | 25.9 | 3 | 1 | No | 20.68 | Only brightest image in DESI DR9 matched; Martinez et al. (2023) |
| 8 | COOL J0335–1927 | 3.27 | 0.4178 | 23.3 | 3 | 0 | No | 21.37 | Napier et al. (2023) |
Notes. ‘sepmax’ is the largest image separation within the system. ‘N’ is the intrinsic image multiplicity. ‘CatNorth imgs’ is the number of counterpart images found in CatNorth. ‘Discoverable’ denotes whether the system is discoverable within CatNorth (i.e. has ≥2 counterpart images); *denotes photometric redshift. The column Brightest Image refers to the g magnitude of the brightest image within the systems; the data is from DESI Legacy Imaging Surveys DR9, except that the **denotes the g magnitude data from Pan-STARRS1.
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