Top panel: high-precision RV measurements for HATS-36 from MPG 2.2 m/FEROS, together with our best-fit circular orbit model. Zero phase corresponds to the time of mid-transit. The center-of-mass velocity has been subtracted. Middle panel: velocity ﹩O-C﹩ residuals from the best-fit model. The error bars for each instrument include the jitter, which is varied in the fit. Bottom panel: bisector spans (BS), with the mean value subtracted. Note the different vertical scales of the panels.