Fig. A.1.
Stokes Q difference maps between Planck 30 GHz 2015 (top) and 2018 (bottom) and WMAP K-band (left) and Ka-band (right). The WMAP K and Ka band maps are rescaled to match the Planck 30 GHz effective frequency assuming synchrotron emission with a spectral index of −3. All maps used in this comparison have been smoothed with a 10 deg Gaussian beam.
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