Cumulative distributions of the positional offset between the true and recovered peak of the SZ signal. These are based on Monte Carlo simulations using the (u, v) sampling of the data visibilities, assuming a noise consistent with the observed one and using a Arnaud et al. (2010) pressure model with a total mass of 6 × 10¹³M_⊙. The grey band (dashed vertical line) shows the offset between the positions of the SZ and X-ray peaks (respectively, BCG).