Sandro Scodeller, Frode K. Hansen
In Scodeller et al. (2012) a new and extended point source catalogue obtained from the WMAP 7 year data was presented. It includes most of the sources included in the standard WMAP 7 year point source catalogues as well as a large number of new detections. Here we study the effects on the estimated power spectra when taking the newly detected point sources into consideration. We create point source masks for all the 2102 sources that we detected as well as a smaller one for the 665 sources detected in the Q, V and W bands. We also create WMAP7 maps with point sources subtracted in order to compare with the spectra obtained with source masks. The extended point source masks and point source cleaned WMAP7 maps are made publicly available. Using the proper residual correction, we find that the power spectra obtained from the point source cleaned map without any source mask is fully consistent with the spectra obtained from the masked map. We further find that the spectra obtained masking all 2102 sources is consistent with the results obtained using the WMAP 7 year point source mask. We also verify that the removal of point sources does not introduce any skewness.
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http://arxiv.org/abs/1207.2315
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