Star/galaxy separation. Diagram of the SExtractor CLASS_STAR (top-left panel), HALF_FLUX_RADIUS_58 (top-right panel), and SPREAD_MODEL (bottom-left panel), as a function of Kron magnitude for sources detected in the r band (black points), with the loci of saturated stars colored in orange. The gray-shaded area corresponds to the area beyond the completeness limit of the r band. In the bottom-right panel we plot the SExtractor MU_MAX parameter as a function of the Kron magnitude for sources detected in the r band, color-coded according to their classification: galaxies in blue, saturated stars in orange, unsaturated stars in red.