Planck 2018 results
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Fig. 3.

image

Comparison of 2018 and 2015 HFI temperature maps, similar to Fig. 2 for LFI. From left to right columns: (1) difference between the 2018 intensity maps and the 2018 Commander CMB map; (2) difference between the 2018 and 2015 frequency maps; and (3) fractional difference between the 2018 and 2015 frequency maps. Note the different temperature scales. Rows indicate results for each of the six HFI frequency channels. All maps are smoothed to a common resolution of 1° FWHM. Note that the 217 and 353 GHz difference maps have been scaled by factors of 1/2 and 1/20, respectively, to conform numerically to the same range as the 100 and 143 GHz maps.

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