K I data taken in Campaign II. Left: Limb darkening data of each wavelength point in the K I 7699 Å line on an arbitrary intensity scale. The curves are ordered by wavelength, with the top (red) curve representing the red continuum, the middle (green) curve representing the line core, and the bottom (blue) curve representing the blue continuum. Right: Normalized intensity of the averaged line profiles at different µ-angles. Spectra for µ ≥ 0.15 have been incrementally offset vertically by +0.3 for clarity.