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OATS-UNI/TS SEMINAR
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Speaker: Maura Sandri (INAF - IASF Bologna)

Title: Optical systematic effects in Planck measurements
Date: Wednesday, May 7th, 2014
Time: 11:30
Venue: Villa Bazzoni
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Abstract Owing to the small amplitude of the CMB anisotropies, accurate control of systematic effects is mandatory to perform high precision measurements. Specifically the optics (composed by the telescope-feed horns assembly) is one of the major limiting factors, because main beam distortions and sidelobes are two of the main sources of systematic errors. The former degrades the angular resolution, limiting the reconstruction of the anisotropy power spectrum at high multipoles, the latter drives unwanted radiation not coming from the boresight direction (the so-called straylight) into the feed horns, contaminating the measurement mainly at large and intermediate angular scales. After a general overview of the Planck mission and a brief outline on the main systematic effects, an in-depth discussion on the optical systematic effects, in terms of characterisation and removal, will be presented.
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Contact: Andrea Zacchei (OATS)