Upper panel: completeness as a function of the continuum nonprimary-beam-corrected flux density (G_pb S_inj) achieved for point sources in various pointings. Middle panel: similar figure after having divided the nonprimary-beam-corrected flux by the noise at the center of each pointing (σ_center). Various colors (blue, green, yellow, and red) corresponds to various injected source sizes (FWHM = 0, 0.333, 0.666, and 1 arcsec, respectively). The solid lines indicate the mean trend of the various pointings, while the dashed lines indicate the 1-σ envelop. Lower panel: same plot after normalizing the injected flux by 1/σ_center and by the source area (Ω_source/Ω_beam). These results are discussed in Sect. 3.8.