Astron. Astrophys. Suppl. Ser. 142, 499-509

Destriping of polarized data in a CMB mission with a circular scanning strategy

B. Revenu ¹ - A. Kim ¹ - R. Ansari ² - F. Couchot ² - J. Delabrouille ¹ - J. Kaplan ¹

Send offprint request: B. Revenu
e-mail: revenu@cdf.in2p3.fr

1 - Physique Corpusculaire et Cosmologie, Collège de France, 11 place Marcelin Berthelot, F-75231 Paris Cedex 05, France
2 - Laboratoire de l'Accélérateur Linéaire, IN2P3 CNRS, Université Paris Sud, F-91405 Orsay, France

Received May 28; accepted December 16, 1999

Abstract:

A major problem in Cosmic Microwave Background (CMB) anisotropy mapping, especially in a total-power mode, is the presence of low-frequency noise in the data streams. If unproperly processed, such low-frequency noise leads to striping in the maps. To deal with this problem, solutions have already been found for mapping the CMB temperature fluctuations but no solution has yet been proposed for the measurement of CMB polarization. Complications arise due to the scan-dependent orientation of the measured polarization. In this paper, we investigate a method for building temperature and polarization maps with minimal striping effects in the case of a circular scanning strategy mission such as the PLANCK mission.

Key words: methods: data analysis; cosmology: cosmic microwave background; polarization