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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2007

Testing gaussianity on Archeops data

Résumé

A Gaussianity analysis using a goodness-of-fit test has been performed to study the measured Archeops Cosmic Microwave Background (CMB) temperature anisotropy data for a 143 GHz Archeops bolometer. We consider large angular scales, greater than 1.8 degrees, and a large fraction of the North Galactic hemisphere, around 16%, with a galactic latitude b > 15 degrees. The considered goodness-of-fit test, first proposed by Rayner & Best (1989), has been applied to the data after a signal-to-noise decomposition. The method has been calibrated using simulations of Archeops data containing the CMB signal and instrumental noise. Two kind of maps produced with two different map-making techniques (coaddition and Mirage) have been analysed. Archeops maps for both Mirage and coaddition map-making, have been found to be compatible with Gaussianity. From these results we can exclude a dust and atmospheric contamination larger than 11.5% (90% CL). For comparison, the same method has been applied to data from the NASA WMAP satellite in the same region of sky. The 1-year and 3-year releases have been used. Results are compatible with those obtained with Archeops, implying a similar upper limit for $f_{nl}$ on degree angular scales.

Dates et versions

in2p3-00121133 , version 1 (08-10-2007)

Identifiants

Citer

A. Curto, J. Aumont, J.F. Macias-Perez, E. Martinez-Gonzalez, R.B. Barreiro, et al.. Testing gaussianity on Archeops data. Astronomy and Astrophysics - A&A, 2007, 474, pp.23-33. ⟨10.1051/0004-6361:20066881⟩. ⟨in2p3-00121133⟩
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