Hubble diagram for data events at different levels of the photometric SN Ia selection. Black dots stand for events at the end of the selection, green filled (resp. open blue) circles for events rejected by the constraints on the SALT2 fitted g − i vs. g (resp. i − z vs. i) colour-magnitude diagram, open red circles for events rejected by the constraints on the SALT2 fitted r − z vs. r diagram.