Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...520a..12m&link_type=abstract
Astronomy and Astrophysics, Volume 520, id.A12
Astronomy and Astrophysics
Astrophysics
14
Space Vehicles: Instruments, Submillimeter: General, Telescopes, Cosmic Microwave Background, Instrumentation: Polarimeters, Instrumentation: Detectors
Scientific paper
Planck is a European Space Agency (ESA) satellite, launched in May 2009, which will map the cosmic microwave background anisotropies in intensity and polarisation with unprecedented detail and sensitivity. It will also provide full-sky maps of astrophysical foregrounds. An accurate knowledge of the telescope beam patterns is an essential element for a correct analysis of the acquired astrophysical data. We present a detailed description of the optical design of the High Frequency Instrument (HFI) together with some of the optical performances measured during the calibration campaigns. We report on the evolution of the knowledge of the pre-launch HFI beam patterns when coupled to ideal telescope elements, and on their significance for the HFI data analysis procedure.
Ade Peter A. R.
Bouchet Francois R.
Brossard Jean
Catalano Andrea
Colgan Ruth
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