Histogram of (posterior) residuals weighted with σ(ξ^(σ)), i.e. both the thermal noise and the Bayesian weighting scheme. Blue and orange bars denote real and imaginary parts, respectively. The black dotted line displays a standard normal Gaussian distribution scaled to the number of data points. For multi-scale CLEAN the residuals for both the model and restored image are shown. Histogram counts outside the displayed range are shown in the left- and rightmost bin.