Free Access
Fig. A.1.

Member stars (blue) together with field stars (grey) for UBC1 in (l, b) (left panel) and in proper motion space (middle panel). The CMD shows the sequence of the identified members (outlining an empirical isochrone) (right panel).
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.