Power spectra of the input and output maps of the component separation applied to the mock data. The figure shows the power spectra of , , , , , and as well as the cross spectrum between and . The notation 〈•〉_i represents the mean of the spectra computed over the 72 separation runs. The colored bands represent ±1σ error-bars, computed as the standard deviation of these spectra. The component separation allows to recover the power spectra of the input maps within statistical uncertainties.