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Fig.1

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Comparison between our Planck 857 GHz mask (red indicates regions removed from the analysis) and the WMAP 7-year KQ75 mask (green means removed); unlike the case for the mask employed in this paper, the WMAP mask excludes some point sources. The background (blue) is the sky area used for our analysis. This map is a Mollweide projection of the sky in Galactic coordinates.

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