The instrumental polarization of a Gregory-coude telescope

Bibcode
1991SoPh..134....1A
Sanchez Almeida, J.; Martinez Pillet, V.; Wittmann, A. D.
Bibliographical reference

Solar Physics (ISSN 0038-0938), vol. 134, July 1991, p. 1-13. CICYT-supported research.

Advertised on:
7
1991
Number of authors
3
IAC number of authors
2
Citations
42
Refereed citations
34
Description
A theoretical model of the polarization properties of a Gregory-coude telescope is calculated to predict the behavior of the German Gregory-coude telescope installed at the Observatorio del Teide (Spain). Measurements of the real effects produced by this telescope acting upon light of known polarization are compared with the model. An uncertainty in its predictions of about 10 percent, which is produced by the uncertainties of the (complex) refractive index of the metallic layers covering the mirrors, is estimated. The paper concludes by briefly considering the way in which the plain telescope changes the Stokes' profiles.
Type
Refereed
Telescopes

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