Fig. 1

image

Example of the background method used in the spectral analysis (see Sect. 3). The image of the cluster XLSSC 010 with the regions showing the spectral extraction region (black circle), cluster detection radius (dashed red circle), and the background annulus centred on the aimpoint of the observation (blue annulus).

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.