Intensity spectra at disk center and close to the limb compared to the FTS atlas (Neckel 1999, convolved with a 10 mÅ Gaussian and adding 5% stray light) and the Second Solar Spectrum atlas (Gandorfer 2002), respectively. Vertical dashed black lines indicate the spectral positions of the line cores (Sr I and Fe I) and the selected continuum position. Vertical red lines indicate the wavelength positions of the red wing where Stokes V/I is plotted later in the paper. We normalized each spectrum to the continuum.