Planck 2018 results
Free Access

Fig. 20.

image

Binned TT cross-spectra from half-ring maps at 30, 44, and 70 GHz. Foregrounds are accounted for only through the use of the proper frequency-dependent Galactic masks. Red-dashed lines are the Planck best-fit TT spectrum, to which a contribution from unresolved point sources (specific to each frequency) has been added.

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