Comparison of the radial velocities from different studies with our orbital solution. Filled symbols correspond to the secondary component and open ones to the primary. Circles represent measurements from Young (1976), triangles represent velocities from Yushchenko et al. (1999, 2001), diamonds are from Catanzaro & Leto (2004), and squares represent our measurements. The lines show the theoretical radial velocity curve for the secondary (solid) and primary (dashed).