Surface brightness reconstruction of source S0 at redshift z = 1.4869 from the best-fit model Esr2-MP_test (L). Two nearby group members are included in the modeling, while other objects within the gray regions are masked out. We show the observed HST F160W image over a field of view of 36″ × 22″ (top left), the best-fit model of the main arc, BGG and group members (top right), the normalized residual (bottom left) in the range −7σ to 7σ, and the source-plane reconstruction of S0 over a field of 2.1″ × 2.1″ (bottom right). The arc is well fitted and does not show significant residuals in the image plane. S0 has a clear spiral shape in the source plane. It is well reconstructed in all our lens models, with an intrinsic morphology consistent with our reference model Esr2-MP_test (L).