Amplitude of the noise mismatch in terms of expected signal amplitude, varth, in percentage as a function of the pixel resolution, Nside for HMHD polarization data (top plot) and OEHD polarization data (bottom plot). Coloured lines show results for the four different component-separation pipelines, Commander (red), SMICA (cyan), SEVEM (green), and NILC (orange). Error bars show the amplitude of the MC dispersion at ±1 σ, showing that where the noise is well characterized the bias is embedded in the uncertainty in the variance extraction and hence it is not significant.
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