Phased radial-velocity curve. The measurements are represented by black symbols with 1σ error bars, and the best fitting Keplerian model is indicated by the solid red curve. The corresponding orbital parameters are given in Table 4. The ESI spectra are shown as crosses, ISIS spectra as open squares, and X-shooter spectra as open diamonds. The dashed horizontal lines indicate the individual exposure times over which the Keplerian curve is averaged before being compared with the measurements. The residuals, χ, are shown in the lower panel. An orbital phase of 0 corresponds to the pericenter passage.