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Different modes for spectropolarimetric measurements

Published online by Cambridge University Press:  01 November 2006

D.Y. Kolobov ,
N.I. Kobanov  and
V.M. Grigoryev
D.Y. Kolobov
Affiliation:
Institute of Solar-Terrestrial Physics, P.O. Box 4026, Irkutsk, Russia email: [email protected] Present address: Institute of Solar-Terrestrial Physics, Lermontov st., 126, Irkutsk, Russia.
N.I. Kobanov
Affiliation:
Institute of Solar-Terrestrial Physics, P.O. Box 4026, Irkutsk, Russia email: [email protected]
V.M. Grigoryev
Affiliation:
Institute of Solar-Terrestrial Physics, P.O. Box 4026, Irkutsk, Russia email: [email protected]
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Abstract

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Spectropolarimetric methods used at the Sayan Solar Observatory for measuring magnetic field strengths are described. The spectropolarimeter consists of a polarization splitter and a ferroelectric liquid crystal (FLC) modulator, allowing for several longitudinal H measurement modes. The report discusses advantages and disadvantages of modulation-based and modulationless measurements using ordinary slow CCD cameras. In some cases combined variants appear to be preferable.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S233: Solar Activity and its Magnetic Origin , March 2006 , pp. 447 - 448
Copyright
© 2006 International Astronomical Union