Average dust attenuation curve. The mean curve found in this work is plotted as a thick line. The thin lines correspond to variations of ± 1σ of the amplitude of the bump, Eb and the slope of the continuum δ; see text for details. The Calzetti et al. (2000) attenuation curve (dotted blue line) and the effective absorption curve of Charlot & Fall (2000) for a starburst age of 3 × 108 years (dot-dashed red line) are shown in the figure for comparison.
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