Examples of likelihood versus count-rate plots for three combinations of pointing exposures and background ratios from our soft band simulation set. Green symbols show detections with a real input counterpart while red points indicate spurious (false) detections. All sources within 5 arcmin from the pointing center are shown here. Left: 540 pointings with T_exp = 10 ks, background ratio  = 1; Middle: 540 pointings with T_exp = 10 ks, background ratio  = 4; Right: 540 pointings with T_exp = 40 ks, background ratio  = 1. The horizontal line corresponds to ML  = 15, the threshold above which detected sources are included in the catalog. The separation between false and real detections is relatively independent of the pointing quality.