The SZ effect contribution to WMAP. A Cross-Correlation between WMAP and ROSAT

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  • 13 February 2003
Abstract
We cross-correlate WMAP and ROSAT and look for common features in both data sets. We detect a common structure which shows up clearly in the cross-power spectrum of the cross-correlation. The frequency dependence of this common structure follows the expected SZ effect frequency dependence. Assuming that this structure is due to galaxy clusters, we compute the expected cross-power spectrum for a variety of models and compare them with the expected power spectrum. We also discuss the possible sources of systematic erros of our approach.

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