Planck differential number counts (total, dusty and synchrotron) at 6 frequencies between 100 and 857 GHz, normalized to the Euclidean, for each zone (filled circles): deep (red), medium (green) and shallow (blue). Diamonds are from Planck HFI (Planck Collaboration 2011d), triangles from Herschel SPIRE (Oliver et al. 2010; Clements et al. 2010) and BLAST Bethermin et al. (2010b). The bump at 4 Jy at 545 GHz (and at 10 Jy at 857 GHz) in the medium zone is discussed in Sect. B.3.