Photometry and radial velocities of WASP-52. The two upper panels show the transit light curves and their residuals from the fit. Different photometric observations are ranked chronologically from top to bottom with the same order as in Table 2. The three lower plots show the phase-folded radial velocities and their O−C residuals from the Keplerian fit as a function of transit phase and Julian date. The data are presented as follows: SOPHIE HE1 (red circles), HE2 (blue diamonds), HR (black downward triangles), and CORALIE (green upward triangles) – see Table 4.