First panel: radial velocities of HD 29399 from CORALIE (COR98 in blue, COR07 in orange and COR14 in green), HARPS (in red), UCLES (in pink), and CHIRON (in grey). Overplotted are the fitted Keplerian orbit (purple curve) and the linear trend (dark line). Second panel: residual radial velocities after subtracting the Keplerian fit. Third panel: radial velocities phased to the fitted period at 890.9 days. We note that the uncertainties of the HARPS point have been increased to take into account the calibration of the offset and the intrinsic variability of the star (see text).