Detection fractions and completeness as a function of flux. Left: result from 20 Monte-Carlo simulations, in which 1000 point sources with varying fluxes were inserted into the residual image, followed by a source extraction. The horizontal axis denotes the input (peak) flux. The solid line is the average detection fraction, and the dotted lines denote the 1σ uncertainty. Middle: result from scaling the peak flux and total flux density of a subset of high S/N sources with varying sizes down to the detection limit, and applying the 5σ_L detection criteria. The dashed line is the detection fraction as a function of peak flux, the solid line is the detection fraction as a function of total flux density, and the dotted line is the dashed line shifted in flux by 15 percent to approximately match the solid line. Right: estimated completeness of the extracted source catalog as a function of (total) flux limit.