Both sides of this plot show rms image values as a function of radius from the source position. Values calculated from clean-component images appear in the left panel; those on the right come from residual images. The radial distribution of rms values in the dirty image (solid line) is included in both panels for purposes of comparison. The dashed lines represent the Högbom-cleaned data, whereas the dotted lines are from the Sault-Wieringa cleaning.