Fig. A.1
Superimposed spectra (divided by the continuum) of the ground-state ortho- (black) and para-H
O (red) and the o-H2O 212–101(blue) lines. The different absorption components, apart from the main HO emission from the object, are shown by a dashed line and the corresponding velocity is given. The spectra have been smoothed to 0.3 km s-1.
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