Fig. 4
a) Ratio of a penumbral spectrum to a bright Moon spectrum observed on April 15 2014 by CFHT. The solar lines features remain in the ratio spectrum. The data is binned to a low resolution and the RV difference between the two spectra has been corrected. The dashed line region is where the telluric H2O and O2 lines are prominent. They are not shown here as we concentrate on the solar spectral feature. b) Ratio of the limb solar spectrum to the centre solar spectrum. The data are from the Kitt Peak Solar Atlas and binned to a low resolution.
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