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Noise power spectrum estimation and fast map making for CMB experiments

By A. Amblard and J.C. Hamilton

Abstract

5 pages, 6 figuresWe present a method designed to estimate the noise power spectrum in the time domain for CMB experiments. The noise power spectrum is extracted from the time ordered data avoiding the contamination coming from sky signal and accounting the pixellisation of the signal and the projection of the noise when making intermediate sky projections. This method is simple to implement and relies on Monte-Carlo simulations, it runs on a simple desk computer. We also propose a trick for filtering data before making coadded maps in order to avoid ringing due to the presence of signal in the timelines. These algorithms were succesfully tested on Archeops data

Topics: cosmic microwave background, cosmology: observations, large-scale structure of the Universe, methods: numerical, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Publisher: EDP Sciences
Year: 2004
DOI identifier: 10.1051/0004-6361:20034066
OAI identifier: oai:HAL:in2p3-00024475v1
Provided by: Hal-Diderot
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