Fig. 4
The combined Herschel/PACS and Spitzer/IRS continuum-subtracted spectra of IRAS 4B, with bright emission in many H2O (blue marks), CO (red marks), OH (green marks), and atomic or ionized lines (purple). The Spitzer spectrum is multiplied by a factor of 10 so that the lines are strong enough to be seen on the plot. The inset shows the combined spectrum including the continuum.
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