Free Access

Fig. 9.


Comparison of sky-subtraction methods, over a section of the Illustris simulation images. Top-left panel: simulated Illustris Deep Field B section. Top-right panel: same image with a 1 Jy wide Poissonian noise added. Middle-right panel: simulated Illustris Deep Field B with noise masked with SEXtractor (1σ threshold level). Middle-left panel: same image masked with NoiseChisel (default configuration). Bottom panel: estimated sky background as a function of different methods. Black dots: reference methods. Yellow diamond: method applied in the present paper. Notice that all methods overestimate the true sky background level, which is equal to zero in the simulated image. See the legend and axis 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.