Sky-subtracted spectra of GRB 080913 at z = 6.7 for the three sub-slits of the VLT/X-Shooter IFU. The central filled area (light blue) indicates the domain where the Ly-α emission line is expected, within the uncertainty in the redshift of the object (Greiner et al. 2009). The width of the light blue area is twice the redshift error. The sky spectrum is displayed at the bottom of the figure and the positions of the main sky emission lines are indicated by the gray areas.