Main absorption and emission lines in the spectrum. The noise spectra are overplotted with a dotted line and the plot range on the y-axis starts at zero. The scale on the y-axis is arbitrary. The zero point for the velocity scale is set to z = 0.88911. In the left column we show the Balmer lines that are centred at −14 km s^-1 (z = 0.88902). For Hα we show the region around the line from both X-shooter spectra. In the right column we show Ca ii and Ca i, the He i* lines centred at −11 km s^-1 (z = 0.88904) and the CH⁺ line centred at the same velocity as the Ca ii lines. We also show the [Oii] doublet, which is redshifted by 30 km s^-1 relative to Ca ii and have a velocity width of 150 km s^-1. We note that H8 is blended with He i*λ3889. Also overplotted are Voigt profile fits to the absorption lines (except Mg ii that is in the UVB part of the spectrum where the signal-to-noise ratio is too low) and a Gaussian fit to the [Oii] doublet. For the Ca ii lines we only show the Voigt-fits with a single absorption component.