Left: detection number counts as a function of S/N of the individual algorithms. The S/N value in the union catalogue is that of the MMF3 detections when available, followed by that of PwS followed by MMF1 (see Sect. 2.4). See text for discussion on the lower S/N values of PwS compared to the MMF-based algorithms. Right: fraction of common detection over counts from the union catalogue. Sources with S/N> 8.5 are detected by all methods.