Fig. 2

NIR DIBs at 9577 Å and 9632 Å (assigned to the fullerene cation C by Foing & Ehrenfreund 1994) are shown for the reddened X-Shooter sample of sightlines. The spectra have been corrected for the radial velocity of the ISM (including heliocentric correction). The vertical dotted lines indicate the rest wavelength for the respective DIBs. Dashed horizontal lines correspond to the normalised continua. Spectra are vertically offset for clarity. The atmospheric model spectrum (blue) is shown at the top (normalised and vertically compressed) in order to appreciate and evaluate the telluric correction. Solid green curves show the Gaussian model fits. The weak feature at 9633 Å towards HD 161056 and HD 147889 indicates the presence of a weak stellar Mg ii line. This has been noted before by Foing & Ehrenfreund (1997) and estimated by Galazutdinov et al. (2000) to have an equivalent width of 50 mÅ for spectral type B2 III and 80 mÅ for B7 I. These authors assigned two additional features at 9603 Å and 9625 Å, present also in our spectra, to stellar He i.
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