Spectral lines unaffected by instrumental polarization. 1: Theory

Details Spectral lines unaffected by instrumental polarization. 1: Theory Spectral lines unaffected by instrumental polarization. 1: Theory

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...280..688s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 280, no. 2, p. 688-693

Computer Science

Numerical Analysis

5

Calibrating, Instrument Compensation, Instrument Errors, Line Spectra, Numerical Analysis, Polarimeters, Polarization (Charge Separation), Solar Magnetic Field, Faraday Effect, Matrices (Mathematics), Optical Transfer Function, Zeeman Effect

Scientific paper

We propose a new approach to minimize the instrumental polarization (IP) of current polarimetric observations. It is shown how the instrumental polarization can be deduced and removed, by using lines with no intrinsic linear polarization. Notably, no specific understanding of the polarizing properties of our optical setup is required. For the technique to be of practical application, lines unaffected by IP presenting various temperature, magnetic field, etc. sensitivities must be identified. We work out the atomic levels involved in electric dipole transitions which create no linear polarization, from the Zeeman effect.

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