Notes. As the Gomez & Grindlay original RV points (available at CDS) were often taken within < 0.1 d, or < 0.02 in phase, we performed daily averages of these data, which resulted in ten independent RVs – their errors correspond to the 1-σ dispersion. Our RVs correspond to averages on Balmer lines (Hγ and Hβ) / He I lines (at 4026, 4471, 5876 Å) / He II lines (at 4200, 4542, 5412 Å) / metallic lines (Si IVλ4088, N IIIλ4379, O IIIλ5592, C IVλ5801,5812). Quoted errors correspond to the 1-σ dispersion of the three He II measurements. A * indicates data taken within the same year and considered for the determination of an orbital solution, after shifting (see text for details).