Normalized histograms of the differences between the PCCS2 (in blue) and the PCCS2E (in pink) position estimates and those from BeeP. The PCCS2E distribution shows a significantly more extended tail. The two small bumps in the distribution are at 172 (1 pixel) and 343 (2 pixels). The PCCS2 histogram has a less extended tail compatible with smoother homogeneous backgrounds. The peak of both distributions is at about 065, the average position-error estimate for the 857 GHz channel in Eq. (7) and Table 8 of Planck Collaboration XXVI (2016).