Series of Stokes profiles computed with subsets of the line list used for LSD, as described in Sec.4. Every panel displays Stokes I (top), V (middle) and N (bottom) for each line subset and vertical dashed lines indicate the adjusted velocity range over which B_l was estimated. The optical profiles are obtained by stacking the ESPaDOnS observations from 2019, whereas the near-infrared ones from SPIRou 2019b time series, for each panel. The number of lines used in the LSD computation as well as the mean wavelength are displayed.