Top panel: radial velocity measurements over time (red) and fitted model (black) and the residuals to the model fit (O–C). Middle panel: phase-folded velocities on the binary period, where the colour indicates the observationdate. Bottom panel: detection limits as a function of the detectable tertiary period and minimum mass, where different colours are used for 20 different tested tertiary orbital phases uniformly sampled over 360°, and the yellow star highlights the smallest detectable mass for any parameters.