Top: cross-correlation functions obtained with SPIRou pipeline APERO using a variety of numerical masks: K2, an empirical mask based on the whole collection of spectra, its separate J, H, and K contributions and a more filtered version of it, and a theoretical mask based on Castelli models containing atomic lines (with its two flavors of low-Landé factor and high-Landé-factor lines, see text). Bottom: distribution of a_RV showing the relative contribution of each wavelength bin to the RV precision for different line lists.