November 2009 • 2009ApJ...706..923C
Abstract • In the original article, the widths of the IRS H2O, IRS CH4, and IRS NH3 indices were too small by a factor of 2 and should be 0.3, 0.6, and 0.6 μm, respectively. The correct version of Figure 7 is also presented here. We note that none of the conclusions of the paper are changed using the wider indices and we thank Stan Metchev and Amanda White for bringing this to our attention.
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