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Appendix A: Results for unreddened quasars

In Fig. A.1, we show the spectra of all the unreddened quasars (black solid line) along with their best fitting template (red dashed line). As for the reddened quasars, blue squares show the rebinned spectral value used for the fitting procedure. In Table A.1, we report the fitting results for quasars that do not require substantial reddening. We note that there are some objects for which the “no extinction” case does not provide a good fit, although they are considered unreddened, since the best-fit extinction curve is also characterized by a . This may be due to both the actual extinction curve not being part of our grid and some problems in the data. Since the grid of extinction curves is very extended, we plan to reobserve these object to improve our analysis.

Fig. A.1 Unreddened quasar spectra. The observed/rebinned spectra are indicated by black lines/filled blue squares, while the red dashed lines represent the best fitting spectra resulting from the χ2 analysis. The gray bands report regions of bad atmospheric transmission. In each panel, the name and the redshift of the quasar is shown at the top left, while the best fitting slope is reported at the top right.

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	Fig. A.1 continued.
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	Fig. A.1 continued.
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	Fig. A.1 continued.
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	Fig. A.1 continued.
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© ESO, 2010