Upper left: distribution of SDE and SN_BLS from the BLS analysis of 450 000 artificially injected transits in synthetic light curves. “Recovered” transits are plotted as red dots (see text). Lower left: same as above, where the parameter space has been divided into cells and color-coded as a function of the fraction f of transits successfully recovered. Cells with f > 90% (that is, with an incidence of false positives smaller than 10%) are highlighted with a black border. The blue line corresponds to the threshold defined in Eq. (3). Upper right: distribution of SDE and SN_BLS from the BLS analysis of the full sample of 5078 real light curves. Four low-significance candidates are labeled. Lower right: location of the four low-significance candidates on the CMD.