Example CCFs (black crosses) obtained from FLAMES spectra taken at HJD = 2 455 940.6 (left) and 2 455 979.6 (right), showing the best-fit model (cyan) together with the associated 68.5% confidence interval (light cyan shaded region). The Gaussian and GP terms are also shown separately by the red dot-dashed and blue dashed lines respectively, with a vertical offset added for clarity. The top panel in each case shows the full range used in the fit and the bottom panel a zoom on the region around the peaks.