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Paper: Near IR Filter Linear Polarimetry in the Corona with a 4 m Aperture
Volume: 463, 2nd ATST-EAST Workshop in Solar Physics: Magnetic Fields from the Photosphere to the Corona
Page: 347
Authors: Kim, I. S.; Popov, V. V.; Suyunova, E. Z.
Abstract: An approach for 2D linear polarimetry of the continuum corona with actual accuracies of 1% in the polarization degree, p, and 1° in the polarization angle, χ, is briefly described and is aimed at obtaining polarization “images”: 2D distributions of p and χ. Several conditions must be met: low sky brightness, low stray light in a telescope, uniformity of polarizer parameters for any point of the image, “statistics”, the special algorithm of data reduction based on Stokes vector presentation. p– and χ–images of an Hα-prominence are presented to illustrate the potential of the approach for emission line objects. Prospects for the 2D linear polarimetry with the 4 m aperture coronagraph in the near IR coronal line Fe XIII 1074.7 nm are discussed. The required filter width is estimated to be ≤ 1 Å for the line intensity of 2· 10–4.
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