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Thomson scattered photospheric light is the dominant constituent of the lowersolar corona's spectral continuum viewed off-limb at optical wavelengths. Knownas the K-corona, it is also linearly polarized. We investigate the possibilityof using the a priori polarized characteristics of the K-corona, together withpolarized emission lines, to measure and correct instrument-induced polarizedcrosstalk. First, we derive the Stokes parameters of Thomson scattering ofunpolarized light in an irreducible spherical tensor formalism. This allowsforward synthesis of the Thomson scattered signal for the more complex scenarioof symmetry-breaking features in the incident radiation field, which couldlimit the accuracy of our proposed technique. For this, we make use of anadvanced 3D radiative magnetohydrodynamic coronal model. Together withsynthesized polarized signals in the Fe XIII 10746 Angstrom emission line, wefind that an ad hoc correction of telescope and instrument-induced polarizationcrosstalk is possible under the assumption of a non-depolarizing opticalsystem.

Thomson scattering above solar active regions and an ad-hoc polarization correction method for the emissive corona