Left: completness of our algorithm at high latitudes (b > 20°) as a function of S₁₀ flux. Blue line marks the S90 flux in our analysis, while black dashed line marks the corresponding value from (Di Mauro et al. 2018). Right: the gray histogram represents the numbers of AGNs and PSRs from the 4FGL catalog, as a function of the S₁ source flux. Red dots represent the source numbers from our F0 test catalog. Black dots represent sources that are recovered from F0 by our algorithm, accounting for true and false positives (TP+FP). Blue dots represent only TP. Notice that we got rid of FP by using the classification algorithm (see Sect. 4). Vertical lines are drawn to guide the eye and represent proxies for detection thresholds in our analysis (blue) and 4FGL (black, dashed).