Top: temperature power spectra evaluated from downgraded Planck maps, estimated with Commander, NILC, SEVEM, and SMICA, and the 9-year WMAP ILC map, using the Bolpol quadratic estimator. The grey shaded area indicates the 1σ Fisher errors. The solid line is the PlanckΛCDM best fit model. Bottom: difference between the other power spectra in the top panel and Commander. The black lines show the expected 1σ uncertainty due to (regularization) noise. This is Fig. 34 of Planck Collaboration XV (2014).