Data di Pubblicazione:
2009
Citazione:
Impact of 1/f noise and asymmetric beam on non-gaussianity searches with Planck / S. Donzelli, F.K. Hansen, M. Liguori, D. Maino. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 706:2(2009 Dec), pp. 1226-1240.
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 an f NL estimator. We look respectively for false primordial non-Gaussian detections and for bias or variance increase in the estimated f NL value. Even if some slight effects are present, we cannot observe any significant impact of the 1/f noise and the asymmetric beam on non-Gaussianity searches in the context of the Planck mission.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
cosmic microwave background ; cosmology: observations ; early universe ; methods: data analysis ; methods: statistical
Elenco autori:
S. Donzelli, F.K. Hansen, M. Liguori, D. Maino
Link alla scheda completa: