Fig. A.2
Grid of OH LVG models for different gas temperatures and densities. Contour
levels of the OH 
J =
9/2+–7/2−/
–J =
3/2−–5/2+ (65.279/96.363 μm) line ratio
for N(OH) = 1016 cm-2. Note the gas
temperature dependence of this ratio. The black continuous curves enclose the
observed intensity line ratio with a ~15% of relative flux
calibration error.
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