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Fig. 13

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Total metal-to-dust ratios for GRB afterglows versus stellar mass of their host galaxies. Black data are galaxies hosting a highly-extinguished afterglow using the first values of Table 5, where the three hosts with the highest are labeled. The shaded area indicates the probability distribution for optically-selected GRBs, represented by a log-normal distribution of based on Schady et al. (2010) and a Gaussian distribution in log (M [M] ) based on SGL09.

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