The left and middle panels display the probability distributions of spurious sources (ID_Any<0; blue) and all sources (orange) for the 100 ks simulations as a function of off-axis angle (left) and relative background level (middle), respectively. The right panel displays the numbers of AGN (orange) and galaxy clusters (blue) detected as multiple sources in one field for the “PSF-fitting catalog 1” (empty) and the final catalog (filled), respectively. Only sources with an off-axis angle <26′ are plotted in the middle and right panels.