Radial velocity curves of the cool (top) and hot (bottom) components folded with the period P_sp = 918^d. The values measured from SALT/HRS and FEROS data are shown with filled and open circles, respectively. Lines show synthetic radial velocity curves: for the case of the eccentric orbit (solid), circular orbit (dashed), and from the solution for RV_cF only (dot dashed). The corresponding horizontal lines represent the systemic velocities in these three cases.