VLT/FORS2 spectropolarimetry of Centaurus A’s polarized knot. The total flux spectrum is shown in the top-left panel. The Stokes parameters Q and U (normalized by I) are shown on the middle-left and bottom-left panels, respectively. The polarized flux (that is the multiplication of the total flux with the polarization fraction) is shown on the top-right left panel. Finally, the polarization degree P is presented in the middle-right panel and the polarization position angle θ is shown in the bottom-right panel.