CMB angular power spectrum D_ℓ residuals with respect to Planck theoretical best fit spectrum for three different SMICA configurations. In blue we show the leading configuration of this paper using cross-spectra of data splits, in red the one using cross- and auto-spectra as described in Sect. 5.4, and in green the results obtained including 857 GHz channel observations, as detailed in Sect. 5.3. Only one point every three bins is displayed. We show results for f_sky = 0.5 in the top panel and f_sky = 0.6 in the bottom panel. We note that the baseline analysis of this paper (red), i.e. the case which uses without the 857 GHz channel, has a smaller residual overall with respect to the other two cases.