Spatial distribution of all the objects studied in this work overplotted on the combination of the two deep-dithered I band WFI images (Prisinzano et al. 2005). X symbols indicate WTTS, circles indicate CTTS, plus indicate nonmembers, and diamonds indicate M0 or later stars. O stars falling in the field of view (FOV) investigated in this work are also indicated. Coordinates RA(J2000) and Dec(J2000) are given in hours and degrees, respectively.