Free Access

Fig. 3

image

Variability of airmass (red squares), local seeing (black circles), and FWHM of diffuser-assisted science frames (blue diamonds) as a function of time within a single night of observations. The seeing was calculated by the TNG staff, and the diffuser-assisted observations used ED #1 in ALFOSC.

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.