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Fig. 4


VISTA primary mirror on its wash-stand, after the first coating in April 2008. The telescope pier is behind the group. The apparent “kink” near the front arises from two reflections off the mirror.

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.