Overview of the cross-correlation cleaning process. Panel A: the raw cross-correlation function time-series applied after the out-of-transit spectra have been divided and the residual broadband features removed. Both the Doppler shadow and the alias structures are present. Panel B: the planet mask covers the expected planet signal, the half-width of the planet mask is 20 km s⁻¹. Panel C: the fitted Doppler-shadow profile is a two-component Gaussian. Panel D: the cross-correlation function after removal of the Doppler shadow, residual stellar aliases are still present. Panel E: the resulting cross-correlation map after removing the stellar aliases. The signature of the planet appears as the dark slanted trace. In this plot, the sign is negative; however, it is flipped in preceding figures to denote absorption.