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In (Scodeller et al.) a new and extended point source catalogue obtained fromthe WMAP 7-year data was presented. It includes most of the sources included inthe standard WMAP 7-year point source catalogues as well as a large number ofnew detections. Here we study the effects on the estimated CMB power spectrumwhen taking the newly detected point sources into consideration. We createpoint source masks for all the 2102 sources that we detected as well as asmaller one for the 665 sources detected in the Q, V and W bands. We alsocreate WMAP7 maps with point sources subtracted in order to compare with thespectrum obtained with source masks. The extended point source masks and pointsource cleaned WMAP7 maps are made publicly available. Using the properresidual correction, we find that the CMB power spectrum obtained from thepoint source cleaned map without any source mask is fully consistent with thespectrum obtained from the masked map. We further find that the spectrumobtained masking all 2102 sources is consistent with the results obtained usingthe standard WMAP 7-year point source mask (KQ85y7). We also verify that theremoval of point sources does not introduce any skewness.

Masking versus removing point sources in CMB data: the source corrected WMAP power spectrum from new extended catalogue