Power spectrum residual plots illustrating the accuracy of the foreground modelling. For each cross-spectrum, there are two sub-figures. The upper sub-figures show the residuals with respect to the Planck+WP best-fit solution (from Table 5). The lowers sub-figure show the residuals with respect to the Planck+WP+highL solution The upper panel in each sub-figure shows the residual between the measured power spectrum and the best-fit (lensed) CMB power spectrum. The lower panels show the residuals after further removing the best-fit foreground model. The lines in the upper panels show the various foreground components. Major foreground components are shown by the solid lines, colour coded as follows: total foreground spectrum (red); Poisson point sources (orange); clustered CIB (blue); thermal SZ (green); and Galactic dust (purple). Minor foreground components are shown by the dotted lines colour coded as follows: kinetic SZ (green); tSZ×CIB cross-correlation (purple). We also show residuals for the two spectra 100 × 143 and 100 × 217 that are not used in the Planck likelihood. For these, we have assumed Poisson point-source correlation coefficients of unity.The χ² values of the residuals, and the number of bandpowers, are listed in the lower panels.