Fig. 1.
Download original image
Map of the uniformly calibrated IGAPS field centres (grey). A darker grey colour is seen where the database contains more than one uniformly calibrated exposure. The orange overplotted points mark the 339 exposure sets (1356 CCD frames) without alternatives in the database, where the Hα sky background exceeds 210 counts (> 95th percentile).
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.