Systematic effects in the measurement of polarization by the PLANCK telescope

Details Systematic effects in the measurement of polarization by the PLANCK telescope Systematic effects in the measurement of polarization by the PLANCK telescope

2002-10-04

arxiv.org/abs/astro-ph/0210109v2

Astron.Astrophys. 405 (2003) 349-366

Astronomy and Astrophysics

Astrophysics

Minor Changes. Version accepted by A&A

Scientific paper

10.1051/0004-6361:20030467

We present estimates of the response to polarized signals by the PLANCK telescope. These estimates are based on a set of simulations, using a physical optics code (GRASP8), for linearly polarized detectors at different frequencies and located in different positions of an early design of the PLANCK focal plane. We show how the optical aberration introduced by the studied focal plane configuration affects absolute and relative orientation of the sky signals polarization planes. In addition, we compute the spurious signal introduced by the telescope optics into a PLANCK-type measurement of the sky polarization. Our analysis shows that the spurious polarization expected in a PLANCK-like experiment is typically of the order of 0.2 % of the unpolarized intensity.

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