Average line profile of HD 209458 in the white CCFs calculated with ESPRESSO F9 mask (epoch 2). Exposures at orbital phases −0.014 (ingress, blue profile), 0 (conjunction, green profile), and 0.014 (egress, red profile) illustrate the change in line shape between stellar limb and center. Because of the aligned orbit, profiles occulted at ingress and egress have opposite rv and similar shapes. Dashed black lines show the Gaussian profiles used to derive the line properties (Fig. 25).