Fig. 11
Calibration source stowed within a cylindrical lead box attached to each collimator of each telescope module (a). The lead box ensures no flux from the calibration source is measurable during astrophysical observations. The calibration source can be inserted into the collimator, as shown in the right panel b, where it illuminates its detector.
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.