Map of the CCF_loc series in the first (top panel) and second (bottom panel) night, as a function of orbital phase (in ordinate) and radial velocity in the stellar rest frame (in abscissa). Maps were obtained for the adjusted transit parameters (see text). Colours indicate the flux values. The four horizontal dashed white lines show the times of transit contacts. In-transit CCF_loc show the average stellar line profiles from the regions occulted by HD 209458 b across the stellar disk. The magenta crosses are the measured centroids of the average stellar line profiles, corresponding to the local RVs of the planet-occulted regions.