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Preprint typeset using L ATEX style emulateapj v. 10/09/06 IMPACT OF THE 1/F NOISE AND THE ASYMMETRIC BEAM ON NON-GAUSSIANITY SEARCHES WITH

By Simona Donzelli, Frode K. Hansen, Michele Liguori and Davide Maino

Abstract

We study the impact of correlated instrumental noise and non-circular antenna beam patterns on primordial non–Gaussianity analysis. The two systematic effects are reproduced in the case of the Planck mission, using Planck-like realistic simulations. The non–Gaussian analysis is conducted with different approaches. First we adopt a blind approach, using the Spherical Mexican Hat Wavelet and the Minkowski functionals, and then a fNL estimator. We look respectively for false primordial non–Gaussian detections and for bias or variance increase in the estimated fNL value. Even if some slight effects are present, we can not observe any significant impact of the 1/f noise and the asymmetric beam on non–Gaussianity searches in the context of the Planck mission. Subject headings: cosmic microwave background — cosmology: observations — early universe — methods: data analysis — methods: statistical 1

Year: 2009
OAI identifier: oai:CiteSeerX.psu:10.1.1.312.4560
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