Spectropolarimetry of SN 2005hk on 2005 November 9, on the Stokes Q– U plane. The data have been binned to 30 Å for clarity, and have been corrected for the ISP component, which is indicated on the Stokes plane by the filled black circle, with the radius of the circle corresponding the measured uncertainties. The data are color coded according to wavelength following the scheme of the color bar. The origin of the Stokes plane is indicated by the cross (+). The black dashed circle represents the null polarization envelope, at 6000 Å. The heavy black line indicates the best fit to the "dominant axis." The ellipse shows the apparent axial ratio and orientation of the data, as determined using the PCA, with the size of the ellipse arbitrarily scaled.