Cross-correlation residuals, K_p maps, and S/N plots after combining the three nights for each species. Left column: cross-correlation residual maps for Fe I and Fe II. Middle column: K_p map after cross-correlating residuals with the model of Fe I and Fe II. The yellow x is located at the predicted K_p value and 0 km s⁻¹. The grey contour represents the area with 1σ from maximum signal. Right column: CCF values (black) for the predicted K_p value with the fitted Gaussian profile (red).