Typical patterns in a residual image created by t-phot, caused by inaccurate PSF/kernel determination. In this case, the ring-shaped shadow surrounding a bright central spot is due to an underestimation of the central peak of the LRI PSF, which causes an overestimation of the fit in the outskirts while leaving too much light in the centre.
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.