New imaging polarimeter for the Mont-Megantic Observatory

Details New imaging polarimeter for the Mont-Megantic Observatory New imaging polarimeter for the Mont-Megantic Observatory

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4843..503b&link_type=abstract

Polarimetry in Astronomy. Edited by Silvano Fineschi . Proceedings of the SPIE, Volume 4843, pp. 503-509 (2003).

Astronomy and Astrophysics

Astronomy

1

Scientific paper

An imaging polarimeter for the visible has been built for the mont Mégantic Observatory. It uses a new design with a Foster prism which allows to obtain the two orthogonal beams of polarized light onto the detector at the same time, thus alleviating calibration problems associated with variations in the sky transparency during the observations. The field of view is 2.4 arc minutes at the f/15 focus of the telescope. A rotating achromatic half-wave plate is used to get all the linear polarization components and eliminate systematic calibration effects. Circularly polarized images can also be obtained by substituting a quarter-wave plate for the rotating half-wave plate. A user-friendly software for carrying out the data reduction has been developed.

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