FM5p.36 — The importance of band pass and frequency dependent beam modelling in CMB experiment, lessons learned from Planck/LFI

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Aug 10th at 6:00 PM until 7:30 PM




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Author(s): Michele Maris2, Maura Sandri1, Thomas Vassallo2, Samuele Galeotta2, Daniele Tavagnacco2, Maurizio Tomasi3, Fabrizio Villa1, Francesco Cuttaia1, Aniello Mennella3, Cristian Franceschet3, Marco Bersanelli3, Andrea Zacchei2

Institution(s): 1. INAF-IASF Bologna, 2. INAF/Trieste Astronomical Observatory, 3. Milano University

The high level of accuracy required by recent CMB experiments can be obtained accounting for very tiny effects while calibrating them. Among those effect it must be considered the fact that the cosmological dipole, usually used as primary calibrator, must be convolved with the full-sky beam pattern of the instrument and averaged over its bandpass. This is in particular true for a multi horn instrument as Planck/LFI. In this communication we discuss this problem, common to all the CMB missions, in the light of the experience gained on the Planck/LFI instrument.