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Fig. 1


Wavelength coverage of the data. Top panel: transmission function of the Earth’s atmosphere, and bottom panel: wavelength coverage of the data from the four instruments used in this work. Telluric contamination adversely affects our analysis, but regions that contain telluric lines are down-weighted by our analysis procedure according to the effect of the telluric lines on the cross-correlation function (see Sect. 3.1).

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