Fig. 2

Variability in the spectra over the night of 19 July 2007 for some water lines in the band at 5900 Å with the Na i D1 line on the left. The colorbar indicates the airmass. Panel a shows the non-corrected spectra. Green bands indicate the strongest telluric lines. Panel b is the variation of each non-corrected spectrum from the mean spectrum of the night. Panel c shows spectra corrected from the telluric lines using Molecfit. Paneld is the variation of each corrected spectrum from the mean spectrum.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.