Spectra and raster scan images of EB1. The upper three panels represent raster scan images for respectively Hβ, He i D₃, and He i 10 830 Å. The exact wavelength at which the raster scan images are shown is indicated by a black vertical line on the corresponding spectra. The white box indicates the region for which the average spectrum is given in black. The coloured boxes around certain pixels correspond to the pixels for which the spectra are given in the same colour. All spectra are given on three scales: wavelength λ, Doppler width Δv_D and line-of-sight (LOS) velocity v_LOS.