Noise power spectrum estimation and fast map making for CMB experiments

A. Amblard; J.C. Hamilton

HAL: in2p3-00024475, version 1

arXiv: astro-ph/0307203

DOI: 10.1051/0004-6361:20034066

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Astronomy and Astrophysics 417 (2004) 1189-1194

Noise power spectrum estimation and fast map making for CMB experiments

A. Amblard¹, J.C. Hamilton^{1, 2, 3}

(2004)

We 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.

1:	PCC - Physique Corpusculaire et Cosmologie - Collège de France

2:	LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies

3:	LPSC - Laboratoire de Physique Subatomique et de Cosmologie

Subject(s)

Physics/Astrophysics/Cosmology and Extra-Galactic Astrophysics

Sciences of the Universe/Astrophysics

Keyword(s) : cosmic microwave background – cosmology: observations – large-scale structure of the Universe – methods: numerical

Fulltext link:

http://fr.arXiv.org/abs/astro-ph/0307203


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Submitted on: Wednesday, 13 December 2006 11:26:14
Updated on: Wednesday, 13 December 2006 11:31:55