Best-fit results of the joint RV+TESS short-cadence light curve (Table 3). Top panel: original RVs with offsets removed (only HARPS-post RVs are shown for clarity). Middle panel: quasi-periodic stellar activity term (only HARPS-post RVs are shown for clarity). Bottom panel: RV residuals. The RV have been extracted with the pipeline TERRA, and error bars include the uncorrelated jitter terms added in quadrature to the formal uncertainties. The orange lines indicate the best-fit models: Keplerian+linear trend+stellar activity (top); stellar activity (middle). The gray shaded area in the middle panel gives the ±1σ uncertainty of the quasi-periodic activity signal.