Comparison of the autocorrelation function of the model, with (solid) and without (dashed) broadening, to the CCFs obtained after injecting models into the observed data (purple and grey lines), to assess if post-processing affects the FWHM of the signal. All are normalised with respect to the black dashed line for visual purposes. In the autocorrelation functions, one spectrum has the residuals mask from Sect. 4.4 applied beforehand to better match the steps in the analysis that exclude the more saturated stellar features. The FWHM values of the autocorrelation functions are 34.4 km s⁻¹ and 10.4 km s⁻¹, respectively with (blue solid line) and without (black dashed line) broadening. For the injected models, the FWHM of the CCFs are 29.6 km s⁻¹ (purple solidline), and 7.2 km s⁻¹ (grey dashed line), respectively with and without broadening. The grey and purple lines correspond to their un-normalised counterparts in Fig. 9.