Fig. 1
Top panel: spectra of some pairs of the standard stars observed during the night of 2011 January 08 divided by a pair of Landolt (SA) 102−1081 observed at an airmass of 1.25. Bottom panel: same for the night of 2011 January 09 taking a pair of Landolt (SA) 102−1081 at an airmass of 1.41 as a reference. The airmass of each standard is included in the legend and the spectra are shifted by 0.5 in the vertical for clarity.
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.