Two-dimensional histogram of SExtractor stellarity index (top left panel), half-light radius (top right panel), spread model (bottom left panel), and μ_max (bottom right panel) as a function of the Kron magnitudes for sources in the R-band image. The vertical dashed line in all panels is the magnitude limit we adopted for saturated objects. The points are colour-coded according to their number counts as reported in the vertical colour bars.