Detection S/N maps as a function of V_rest and K_p for CO in GIANO-B (left panel), Fe I in HARPS-N (central panel), and Fe I in ESPRESSO (right panel) data. Dotted red and white lines mark the expected and obtained planetary positions, respectively. For each map, the top and right sub-panels show the 1D CC functions (in terms of S/N) at the peak position, with the best-fit Gaussian overplotted in orange.