Upper left panel shows the CMD of the cluster (black dots) overplotted with the extra-tidal stars (blue dots). Arp 2 isochrone and ZAHB (orange and yellow lines) are also shown with the limits (blue dotted lines) used to select the stars. The middle and right panels show the scaled density of field stars along with the contaminants (red dots). The lower panels show the vector point diagram of the cluster and the two fields.