Comparison of the radial profiles for ϵ Eri using two different registration methods. The hybrid PSF profile (normalized to the peak, which is 21% higher than the expected photosphere) is shown as the black dashed line. The left panel covers the central 12″ region, while the right panel shows the full radial range up to 30″ but with a smaller vertical range of flux. All error bars are shown as 1σ. There are some coherent up and down patterns outside 10″, which are consistent with the flat-fielding residuals and within 3σ of being zero.