Cross-correlation diagrams integrated over a range of orbital velocities, producing velocity-velocity maps typically shown in similar studies based on cross-correlation spectroscopy. These maps were derived using either the spectral template (top panel) or the line mask (middle panel). The cross-correlation function is sampled in steps of 1 km s⁻¹ in systemic radial velocity and orbital velocity. The cross-correlation functions integrated in the rest frame of the planet (assuming an orbital velocity of 221 km s⁻¹, bottom panel) demonstrate that the line mask approach results in an equivalent, but higher-resolution, measurement of the Fe absorption line.