Relation between the FLUX_RADIUS and the I_E-band magnitude for all sources in the SourceExtractor catalogue with I_E ≲ 22.96 identified as galaxies that satisfy the surface brightness-magnitude selection (Fig. 20), the colour–colour selection, and the colour–magnitude selection (Fig. 21, left and right panel) for potential cluster members. Filled and empty dots are for galaxies with uncertainty in the g − H_E colour smaller or larger than 0.1, respectively. Magenta dots are for spectroscopically confirmed cluster members (z_spec ≲ 0.03), red dots for optically identified members, and green dots potential members with z_phot ≲ 0.1 after visual inspection of their VIS images. Blue dots are faint objects of small size considered as background systems.