Table 1.
Input lens mass parameters for RX J1131−1231 obtained by fitting both the quasar image positions as point sources as well as the full Einstein ring as an extended source (Yıldırım et al. 2020).
 |
 |
qspemd | θspemd |
 |
 |
γspemd | γext, ∞ | ϕext |
|---|---|---|---|---|---|---|---|---|
| [″] | [″] | [radians] | [″] | [″] | [radians] | |||
| 4.41 | 3.99 | 0.81 | 3.67 | 3.74 | 10−4 | 0.47 | 0.19 | 1.60 |
Notes. The lens mass distribution is constituted by a power law profile (SPEMD) plus an external shear, whose parameters are, respectively, the centroid position 
, 
, the axis ratio qspemd, the position angle θspemd, the Einstein radius for source at redshift infinity 
, the core radius 
and the slope γspemd for the power law, the external shear strength for source at redshift infinity γext, ∞ and its orientation ϕext.
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