HARPSpol four Stokes parameter spectra of HD 24712 in the 5190–5210 Å wavelength region. The spectra plotted with black lines were obtained around zero phase, when the longitudinal magnetic field reaches its maximum. The spectra plotted with red lines were obtained close to phase 0.5, corresponding to the magnetic minimum. The circular and linear polarization profiles are offset vertically for clarity. We note that Stokes Q and U spectra have been expanded by a factor of 3 compared to Stokes V and I.