Panel a: degree of continuum polarization of the O₂ A-band during umbral eclipse. The x-axis is wavelength in Ångstroem. Shown is Q∕I from a convolution of the spectra with a Gaussian of 300 km s⁻¹ to prevent divisions by zero. The horizontal bar indicates the wavelength span of the major A-band lines. Panel b: degree of line polarization around the pseudo emission line at 7618 Å outside and inside eclipse. The two top spectra are Stokes-V, the two middle spectra are the degree of polarization built from Q and U, the bottom spectrum is Stokes-I for comparison and shows the residual O₂ pseudo emission at 7618 Å. All polarized spectra are arbitrarily offset and enlarged by a factor of 20 compared to Stokes-I.