Dispersion of the position (X,Y) of the stars in every frame, for each epoch, plotted across the WFI detector in units of mas/yr. A higher spread in the dispersion is observed in the edges of the CCD associated with higher order distortion and variable PSF. All of this effects are mostly corrected in the procedure done in the astrometrization (see text for details).
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.