Residual maps. The first and second column display residual maps computed with the Bayesian weights. The third column displays the residual map for the multi-scale CLEAN model image with wsclean weighting. All colour bars have the unit Jy and are defined to be symmetric around zero with maximum five times the median of the absolute values of each image individually. The sign of the residual maps is determined by the r.h.s. of Eq. (31).