Completeness levels (i.e., percentage of detection) as a function of the “true” integrated flux of the synthetic sources injected into the maps $\left(F_{\text{INT}}^{\text{inj}}\right)$ for the three different groups of targets selected based on their rms noise, as introduced in Sect. 2.3: Group 1 (left panel), 2 (middle panel), and 3 (right panel), respectively. The two dashed red lines in each panel identify the estimated completeness flux, $F_{\text{INT}}^{\text{compl}}$, which is reported in red.