Probing Non-Gaussianity In The Cosmic Microwave Background Anisotropies: One Point Distribution Function

Abstract

We analyze WMAP 3 year data using the one-point distribution functions to probe the non-Gaussianity in the Cosmic Microwave Background (CMB) Anisotropy data. Computer simulations are performed to determine the uncertainties of the results. We report the non-Gaussianity parameter fNL is constrained to 26<fNL<82 for Q-band, 12<fNL<67 for V-band, 7<fNL<64 for W-band and 23<fNL<75 for Q+V+W combined data at 95% confidence level (CL).

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