Mock lensed kinematic data of the source galaxy of RX J1131−1231 obtained using an isothermal mass profile (left panel), reconstructed kinematic map from our best-fit MFL model (central panel), and normalised residuals (right panel). The pixel resolution of the kinematic map is 0.1″. The masked black region is the region in the image plane which has no correspondence on the source plane. The yellow cross marks the lens centroid position. If we compare to the data, we see that our model predicted source’s v_rms is slightly underestimated.