Top: VLT/NACO detection limits in K_s-band of 2MASS0652-57, SDSS0443+00, 2MASS0608-27 and 2MASS0435-14, given here up to 10′′. Bottom: detection limits converted in terms of predicted masses as a function of the projected physical separations considering both the DUSTY theoretical model predictions for ages of 10 and 120 Myr and the target properties reported in Table 1. For 2MASS0608-27 probable member of the β Pictoris group, only the age of 10 Myr is given. For 2MASS0652-57, part of the image with the binary companion was masked for the detection limit determination.