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Fig. 2


Our extinction laws for the broad-bump (red line) and the narrow-bump cases (blue line), along with the extinction law of Weingartner & Draine (2001) and Indebetouw et al. (2005). Black symbols represent AIRAC/AKS values obtained by Flaherty et al. (2007) for five star-forming regions, the Ophiuchus, Orion A, Serpens, NGC 2024/23, and NGC 2068/71, and by Indebetouw et al. (2005) for a field (l = 284°) near the star-forming region RCW 49. Color symbols are the AIRAC/AKS values from our synthetic photometry for the SED of a Stage II, YSO with an inclination of 81.4° and AKS = 1 mag. Also shown are the spectral response functions of KS and four IRAC bands in arbitrary units.

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