only the ones inside a mask containing the lensed image, with minimun background sky. The lens is a Singular Isothermal Ellipsoid (SIE, Kormann et al. 1994), described with five parameters: the Einstein radius $r_{\rm E}$, the position angle $\phi$ defined as the orientation of the semi-major axis measured counter-clockwise from West, the ellipticity defined as the ratio between the minor and major axis of the ellipsoid, the displacement of lens centroid $\Delta x_{\rm L}$ and $\Delta y_{\rm L}$ with respect to the HST image center. The lens parameter space is explored using [multinest]{} (Feroz et al. 2009).

Lens modeling results are reported in Tab. \[table:parameters\]. Both data sets lead to the same set of parameters, which are similar to other results showed in literature (Bussmann et al. 2013, Dye et al. 2014), proving the strenght and goodness of our model.

The results are showed in Fig. \[fig:lens\_modeling\_results\]. Properties such as magnification and sizes are computed perturbing 1000 times the lens model parameters around their best-fit values; the reported final values and errors are being the median and the 16th and 84th percentile of the distribution. For each iteration, magnifications are evaluated as $\mu=F^{\rm LP}_{3\sigma}/F^{\rm SP}_{3\sigma}$, $F^{\rm SP}_{3\sigma}$ being the total 