Signal-to-noise ratio of the highest peak of the BLS spectra vs. data weight factor α for a realization of a faint transit signal on the set H0+T0 with zero gap. The transit parameters are as follows: P_orb = 15.2345 d, δ = 0.003, q = 0.010, σ_H0 = 0.004, σ_T0 = 0.0005. All peak frequencies match the orbital frequency, except the very few shown by smaller symbols. See Table 2 and associated text for the definition of the various BLS methods.