EDP Sciences
Free Access
Issue
A&A
Volume 419, Number 2, May IV 2004
Page(s) 783 - 792
Section Instruments, observational techniques, and data processing
DOI https://doi.org/10.1051/0004-6361:20034185
Published online 03 May 2004


A&A 419, 783-792 (2004)
DOI: 10.1051/0004-6361:20034185

The effects of low temporal frequency modes on minimum variance maps from PLANCK

R. Stompor1 and M. White2

1  Computational Research Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA
2  Departments of Astronomy & Physics, University of California, Berkeley, CA 94720, USA

(Received 12 August 2003 / Accepted 17 February 2004)

Abstract
We estimate the effects of low temporal frequency modes in the time stream on sky maps such as expected from the PLANCK experiment - a satellite mission designed to image the sky in the microwave band. We perform the computations in a semi-analytic way based on a simple model of PLANCK observations, which permits an insight into the structure of noise correlations of PLANCK-like maps, without doing exact, computationally intensive numerical calculations. We show that, for a set of plausible scanning strategies, marginalization over temporal frequency modes with frequencies lower than the spin frequency of the satellite ( $\simeq $1/60 Hz) causes a nearly negligible deterioration of a quality of the resulting sky maps. We point out that this observation implies that it should be possible to successfully remove effects of long-term time domain parasitic signals from the PLANCK maps during the data analysis stage.


Key words: methods: data analysis -- cosmology: cosmic microwave background

Offprint request: R. Stompor, radek@cfpa.berkeley.edu




© ESO 2004

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.