Planck 2015 results
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Fig. 2


χ2 (top) and residual maps, dνsν (bottom), for a Commander analysis that includes all Planck channel maps. These residual maps correspond to channels that are rejected from the baseline analysis due to instrumental systematics; the labels in the top left corner in each panel indicates frequency channels. No regularization noise has been added to the high-frequency channels in this case. The sharp ring-like features at high Galactic latitudes correspond to far sidelobe residuals; the broad features extending between the north and south ecliptic poles correspond to destriping errors; and the Galactic plane features correspond to calibration, bandpass, and modelling residuals. All maps (and all other full-sky plots later in the paper) are shown in Galactic coordinates adopting a Mollweide projection with the Galactic centre (l = 0deg) located in the centre of each panel.

This figure is made of several images, please see below:

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