Extinction curve as function of inverse wavelength at the rest-frame of the DLA normalised to the V-band extinction AV. The grey line shows the full X-shooter spectrum divided by the template of Selsing et al. (2016). The black regions indicate the wavelength regions used in the fit, and the two black squares indicated the photometry in the K and W1 bands. The red, solid line shows the best fit extinction curve, a clear 2175 Å bump is observed in the data. For comparison, the extinction curves from Gordon et al. (2003) are shown as solid blue (SMC), and grey dotted (LMC2) lines. The dashed line corresponds to a Milky-Way extinction law with the single parameter, RV, corresponding to ζPer (Cardelli et al. 1989). A full derivation of the extinction curve towards this star is not available.
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