Upper panel: projected mass–density map for the reference model. The color scale is set between 0 and 0.006 in units of 10¹² M_⊙/kpc². Bottom panel: projected cumulative mass profiles of PSZ1-G311 as a function of the projected distance from the BCG (R). In magenta we show the median value and the 1-σ confidence levels for the total mass profile. In green we show the median value and the 1-σ confidence levels for the subhalo component mass profile. The positions of the multiple images are marked with vertical black segments. The fractional contribution of the cluster member galaxies mass to the total cumulative mass is shown in blue.