Planck 2018 results
Open Access

Fig. 7.


Different masks used for the low- HFI likelihood. Top panels: Commander temperature confidence mask, and polarization masks obtained thresholding the 5°-smoothed 353 GHz polarization intensity map. Middle panels: masks produced with the alternative algorithm described in Sect. 2.2.5. Bottom panels: masks used for the LFI × HFI likelihood estimation (Sect. 2.2.5).

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