Individual Hα emission lines from the spectra obtained during epoch A (black) and epoch B (red) of the optical observations. The dotted black lines mark the maximum terminal velocity observed in the blueshifted and redshifted absorption features (±1500 km s⁻¹). The solid red line marks the intersection between CCDs, proving that the redshifted features, when present, are not due to a normalisation issue. The normalised profiles have been separated vertically by a constant offset for visual purposes.