Same as Fig. 2, except that the abscissa is zoomed in on, and the left panels show the u and y band diagrams, respectively. The two vertical lines in the bottom right panel show the separation boundary between unresolved and resolved sources (dashed at 0.016 mag: Rubin default value for single-band classification; solid at 0.04 mag: adopted here for the mean gri values and designed to ensure stellar completeness to faint magnitude limits).