Radial velocity curves of SB2 star 107 in NGC 3766. The photometric period is written at the top of the panel next to the star ID and, in parenthesis, the orbital period. The RVs of the two components are shown, respectively, red and blue, while the black open circles represent the RVs obtained from a fit of Lorentzian functions to the sides of the H_γ and H_δ lines in the spectra. The lines are sine fits to the data using the photometric period.