Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..405..467g&link_type=abstract
Solar Polarization 5: In Honor of Jan Stenflo ASP Conference Series, Vol. 405, proceedings of the conference held 17-21 Septembe
Astronomy and Astrophysics
Astronomy
Scientific paper
We describe a newly developed instrument used for performing filter based spectro-polarimetry of solar active regions. The instrument consists of a tunable Fabry-Perot etalon kept in collimated arrangement for spectroscopy in the wavelength range 550 to 700 nm. The polarimeter consists of two quarter wave-plates and a dual-beam calcite analyzer (Savart plate). We present the instrument design and the interactive tools for data analysis and visualization. These tools facilitate Milne-Eddington inversion, visualization, heliographic vector transformations and 180 degree ambiguity resolution. It is planned to upgrade the instrument to observe in chromospheric Na D2 and H-α lines together with photospheric Fe I 630.2 nm line pair, in near simultaneous mode.
Gosain Sanjay
Venkatakrishnan Parameshwaran
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