HARPS-N radial velocity data and best-fit spectroscopic orbit solution for Qatar-1. Upper panel: RV curve versus BJD showing only the out-of-transit data used for the orbital solution (solid red line), and the corresponding residuals. Lower panel: phase-folded RV curve (solid red line) and data used for the orbital fit drawn as black symbols. The RV measurements corresponding to in-transit phases are also displayed as light-blue symbols.