Two-dimensional cross-correlation function of H I, Li I, Na I, Mg I, K I, Ca I, Ti I, V I, Cr I, Mn I, Fe I, Fe II, Co I, Ni I, Ba II, Sr I and Sr II for ingress and egress combined in K_p − V_sys space. The last panel shows the cross-correlation function for the entire atmospheric model – including all species – at 2500 K. We highlight the different scales on the colour maps for the deviation from the mean in terms of standard deviations away from the planetary trace, denoted as σ.