GOODS–Herschel detection limits (from Table 1) and total IR luminosities of the Herschel sources as a function of redshift (filled dots: spectroscopic, open dots: photometric). The right axis is the SFR derived from SFR[M_⊙ yr^-1] = 1.72 × 10^-10  ×  [L_⊙] (Kennicutt 1998a). These limits were computed assuming the local library of template SEDs of CE01. For comparison, the Spitzer MIPS-24 μm detection limit is represented as well as the knee of the total IR luminosity function, as derived by Magnelli et al. (2009, 2010).