Noise power spectrum estimation and fast map making for CMB experiments

Details Noise power spectrum estimation and fast map making for CMB experiments Noise power spectrum estimation and fast map making for CMB experiments

2003-07-10

arxiv.org/abs/astro-ph/0307203v1

Astron.Astrophys.417:1189-1194,2004

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, submitted to Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20034066

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.

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