Systematic effects in the measurement of polarization by the PLANCK telescope
Research and Science Support Department of ESA, ESTEC, PO Box 299, 2200 AG Noordwijk, The Netherlands
2 Institut d'Astrophysique de Paris, 98bis boulevard Arago, 75014 Paris, France
Corresponding author: P. Fosalba, firstname.lastname@example.org
Accepted: 6 March 2003
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 of the unpolarized intensity.
Key words: space vehicles: instruments / telescopes / polarization / cosmology: cosmic microwave background / space vehicles
© ESO, 2003