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Fig. 1

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Aringer et al. (2009) photosphere spectrum (gray) with Teff = 3300 K and log (g [cm   s-1]) =  −0.2, showing many strong features at shorter wavelengths. The vertical dashes show the wavelengths at which this spectrum was sampled for input to 2Dust. The resulting GRAMS output model with optical depth τ11.3 = 2 × 10-3 (black) incorporates some of the variation in the optical.

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