Ionised gas modelling of the integrated LR-R spectrum on the PSF region of NGC 4438. In the top panel the green, pink and blue Gaussians represent the primary (P), secondary (S) and tertiary (T) kinematical components, respectively. The global fit is in red and the region where we estimated the ε from the continuum (ε_c) is marked in yellow (see Sect. 3.2). In the bottom panel the residuals of the fit are shown in black, with the horizontal, dashed, yellow lines indicating 3ε_c.