| Issue |
A&A
Volume 405, Number 1, July I 2003
|
|
|---|---|---|
| Page(s) | 349 - 366 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20030467 | |
| Published online | 16 June 2003 | |
Systematic effects in the measurement of polarization by the PLANCK telescope
1
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, fosalba@iap.fr
Received:
2
October
2002
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
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