Planck 2018 results
Open Access

Fig. 9.


217 GHz Q maps cleaned using the 353 GHz map built with the SWBs (left panel), without the SWBs (top centre panel), and with the SWBs but with a polarization efficiency taken to be zero (bottom centre panel). The differences (right panels) leave quadrupole terms of amplitude smaller than 1 μK.

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