Table 2.
Relative astrometry and flux ratios of our newly discovered gravitationally lensed quasar candidates (GRAL113100–441959 and GRAL122629–454209), and of a rediscovered system (GRAL203802–400815), from Gaia DR2 alone.
| Image | GRAL113100–441959 |
GRAL122629–454209 |
GRAL203802–400815 |
||||||
|---|---|---|---|---|---|---|---|---|---|
| Δαcos(δ) (″) | Δδ (″) | G-band flux ratio | Δαcos(δ) (″) | Δδ (″) | G-band flux ratio | Δαcos(δ) (″) | Δδ (″) | G-band flux ratio | |
| A | 0.000(2) | 0.000(1) | 1.000(17) | 0.000(1) | 0.000(1) | 1.000(6) | 0.000(1) | 0.000(1) | 1.000(9) |
| B | 0.345(1) | −0.325(1) | 0.947(10) | −3.066(1) | −1.705(1) | 0.688(3) | 1.515(1) | −0.029(1) | 0.963(5) |
| C | −1.282(1) | −0.425(1) | 0.475(6) | 0.065(1) | −5.453(1) | 0.659(3) | −0.793(1) | 1.676(1) | 0.763(4) |
| D | −0.343(1) | −1.511(1) | 0.402(5) | 4.986(2) | −2.092(2) | 0.434(4) | 1.379(2) | 2.057(2) | 0.550(8) |
Notes. The astrometric errors are typically smaller than ~1 mas for all sources. The larger flux ratio errors in the A and B images of the GRAL113100–441959 candidate might originate from their smaller separation (~0.4″), which is at the limit of the effective resolution of Gaia DR2.
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