Distribution of best-fit Gaussian peak CDF spectral shape parameters, σ and γ (as defined in Eq. (29)), recovered from FFP10 simulations, as indicated by the black dots and the smoothed density map, and compared to those derived for the observed sky (shown by the red star) for the SMICA temperature T (left) and the reconstructed E-mode polarization (right) maps. The blue contours enclose 68% and 95% of the parameter distribution, and the cyan circle represents the best-fit parameters for the median peak CDF determined from simulations. Upper panel: peak CDF parameters for the SMICA map filtered with a GAUSS kernel of 120′ FWHM, lower panel: corresponding peak CDF using the same kernel with 600′ FWHM. Similar results are obtained for the other component-separation methods.