Thomson Scattering above Solar Active Regions and an Ad Hoc Polarization Correction Method for the Emissive Corona

Thomson scattered photospheric light is the dominant constituent of lower solar corona's spectral continuum viewed off-limb at optical wavelengths. Known as K-corona, it also linearly polarized. We investigate possibility using a priori polarized characteristics together with emission lines, to measure and correct instrument-induced crosstalk. First, we derive Stokes parameters scattering unpolarized in an irreducible spherical tensor formalism. This allows forward synthesis signal for more complex scenario symmetry-breaking features incident radiation field, which could limit accuracy our proposed technique. For this, make use advanced 3D radiative magnetohydrodynamic coronal model. Together synthesized signals Fe XIII 10746 Angstrom line, find that ad hoc correction telescope polarization crosstalk possible under assumption non-depolarizing system.