Radial velocity measurements of HAT-P-6 as a function of orbital phase. Filled diamonds represent the SOPHIE data (this paper), and open squares the HIRES data (N08). The lower panel zooms on the transit phases. The dashed line represents the Keplerian fit (ignoring the transit phases), while the solid line represents the final fit including the model of the Rossiter-McLaughlin anomaly. In each panel, the residuals of the final fit are plotted below the data. The vertical dotted lines show the times of mid-transit, first, second, third, and fourth contacts. The fitted values are Vsini_s = 7.5 ± 1.6 km s^-1 and λ = 166° ± 10°.