Studies in optical solar polarimetry

Steve R. Fullerton

doi:10.1117/12.168584

15 February 1994 Studies in optical solar polarimetry

Steve R. Fullerton

Proceedings Volume 2010, X-Ray and Ultraviolet Polarimetry; (1994) https://doi.org/10.1117/12.168584
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Optical solar polarimetry is being studied at the University of Glasgow Observatory as part of a program to investigate the Solar-Stellar Connection. As the degree of polarization being measured is small, typically 0.01% or less, detection to high precisions require accurate techniques incorporating high quality optics and photon counting for the best efficiency. Whole disk solar polarization has been measured at the center of the Fe-line at 4872.14 angstroms and at H(beta) , using a tilt-scanning narrow-band (2 angstroms) interference filter, which show small variations that may be due to the movement of active regions across the solar disk. A double-beam optical polarimeter, using a Savart plate as an analyzer, has been constructed to observe isolated regions of the solar disk. Comparisons will be made between the polarization in active regions and the quiet photosphere, and the center-to-limb variation and the wavelength dependence of the polarization will be investigated.

Citation Download Citation

Steve R. Fullerton "Studies in optical solar polarimetry", Proc. SPIE 2010, X-Ray and Ultraviolet Polarimetry, (15 February 1994); https://doi.org/10.1117/12.168584

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