Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apopt..32.4231s&link_type=abstract
Applied Optics (ISSN 0003-6935), vol. 32, no. 22, p. 4231-4235.
Astronomy and Astrophysics
Astrophysics
3
Grazing Incidence Telescopes, Optical Polarization, Polarimetry, Polarization Characteristics, X Ray Astrophysics Facility, Linear Polarization, Refractivity
Scientific paper
We show that grazing-incidence telescopes, like those used for X-ray imaging, present negligible instrumental polarization. This property does not depend on the number of reflections the telescope employs to lead light from the entrance pupil to the focal plane. The result applies to the various mirrors of the advanced X-ray astrophysics facility satellite. In this particular case we have quantified the residual instrumental polarization to be between 10 exp -3 and 5 x 10 exp -5, depending on the size of the resolution elements.
Martinez Pillet Valentin
Sánchez Almeida Jorge
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