Planck 2018 results
Free Access

Fig. 21.


CMB polarization reconstruction error for each of the four CMB analysis pipelines, as evaluated from the end-to-end FFP10 analysis pipeline. This error is defined as , where Qout and Uout are the estimated Stokes parameters, and Qin and Uin are the true Stokes parameters. Each difference map has been smoothed to 80′ FWHM before computing the polarization amplitude, to reduce the impact of instrumental noise.

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