Plotted over the entire CFHT catalogue for IC 348 (grey dots) are the candidate substellar members selected in this study (black filled circles, white crosses signal spectroscopic observations, numbers correspond to the running identification), and all the candidate members of the cluster from the literature present in the CFHT catalogue (plus sign), including the previously known brown dwarfs from the literature (open circles). The dashed line represents the field observed with WIRCam, the dash-dot line the X-ray observations analysed in Stelzer et al. (2012), and the solid line delineates the area for which there is a complete census of the cluster for masses  ≥ 30 M_Jup (Luhman et al. 2003b).