Field distortion map of the I-band (left panel) and the R-band (right panel) frames. Each arrow shows the expected position on the sky (beginning of arrow) and the measured position (end of arrow). For displaying purposes the arrows are artificially enlarged by a factor of 50 with a scale indicator (four enlarged pixels) shown in the upper left part of each plot.
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.