PSF surface-brightness profiles versus the radius r for a 0 mag point source. Individual PSFs are drawn with coloured lines and symbols as indicated in the figure. PSF_K71, PSF_V,0m, PSF_i,0m, PSF_i,3m, PSF_MBH, and PSF are shown in this figure as references. The light grey region indicates the PSF core, and the white region the aureole, as defined in Paper I. The extrapolated part of PSF_A99 is shown with a dotted line.