Peaks of the light distribution (red contours), mass map (white contours, corresponding to a density equal to 5 and 7    ×    10¹⁰   M_⊙ arcsec^-2) and X-ray surface brightness map (cyan contours). The magenta cross shows the barycentre of the Einstein ring as estimated by Meneghetti et al. (2011). The locations and positional uncertainties (1σ) of the four large-scale mass components are indicated by the yellow ellipses.