Cumulative projected total mass profiles for the PIEMD (solid black), SPEMD (solid blue), PIEMD+BGG (dashed black), and SPEMD+BGG (dashed blue) models with ±1σ uncertainties (differently hatched shaded areas). The curves on top, labeled with M_T, are relative to the total mass, and they are divided into the halo component (M_halo, left panel) and the galaxy member component (M_gal, right panel), identified by the same linestyle. For comparison, we leave M_gal and M_halo as faint lines in the left and right panels, respectively. The vertical lines close to the x axis locate the distances from the lens galaxy center of the different multiple images, color-coded following Fig. 1. The black arrow at R = 9.32 kpc shows the effective radius of the BGG.