Top: WASP lightcurve of WASP-117 folded on the planetary period. All data are shown in gray, and the phase-folded data, binned into 20 min intervals, are shown in black. Middle: CORALIE (black circles) and HARPS (blue triangles) radial velocities folded on the planetary period together with the best-fitting model (red solid line) and residuals. Bottom: bisector spans of the above RV data.