Counts at 160 μm, emissivities, and clustering power spectrum for three values of r_{L⋆,   lz}, the best fit, and the best fit  ± 2σ. Pink crosses are data: Béthermin et al. (2010) for the counts and Lagache et al. (2007) for the power spectrum. Top panel: differential number counts at 160 μm. 2nd panel: mean emissivities at 160 μm. 3rd panel: ratio of the modified emissivities compared to the best fit one at 160 μm. 4th panel: power spectra of the clustering at 160 μm. Bottom panel: ratio of the modified power spectra compared to the best fit one at 160 μm. A small change in r_{L⋆,   lz} leads to a 20% modification of the emissivities and on 15–35% on the C_ℓ.