Open AccessMadam – a map‐making method for CMB experiments
Author(s) -
Keihänen E.,
KurkiSuonio H.,
Poutanen T.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2005.09055.x
Subject(s) - physics , cosmic microwave background , noise (video) , superposition principle , planck , amplitude , residual , astrophysics , algorithm , optics , artificial intelligence , computer science , quantum mechanics , image (mathematics) , anisotropy
We present a new map‐making method for cosmic microwave background (CMB) measurements. The method is based on the destriping technique, but it also utilizes information about the noise spectrum. The low‐frequency component of the instrument noise stream is modelled as a superposition of a set of simple base functions, whose amplitudes are determined by means of maximum‐likelihood analysis, involving the covariance matrix of the amplitudes. We present simulation results with 1/ f noise and show a reduction in the residual noise with respect to ordinary destriping. This study is related to Planck Low Frequency Instrument (LFI) activities.