Maps of the CCF_intr during the transits of HD 3167 c (HARPS-N, upper panel) and HD 3167 b (ESPRESSO, lower panel). Transit contacts are shown as green dashed lines. Values are colored as a function of their normalized flux and plotted as a function of RV in the stellar rest frame (in abscissa) and orbital phase (in ordinate). HD 3167c is large enough that the stellar line can be distinguished in individual exposures, while the small transit depth of HD 3167b makes the line undetectable in most exposures even with the VLT/ESPRESSO data. The green solid lines show the best-fit models for the stellar surface RVs derived with the joint RMR fit to both data sets.