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Fig. 2

As Fig. 1 for Aldebaran (filled circles) in another spectral region. Dotted line: 12C/13C = 10 and 17O/16O = 18O/16O = 0; continuous line: the same 12C/13C with 17O/16O = 1670, 18O/16O = 666. Note again the difficulty to fit the cores of the strongest CO lines (see text). Some of the C17O and C18O lines used are marked.
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