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Fig. 4


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Best fits (in red) overplotted with data (in black) for all objects. The data points included in the fits are marked in orange. Note the different y-axis scales for the first (right) and second (left) overtone. All fluxes are normalized. On the second overtone bandhead plots the hydrogen Brackett series (not marked) can also be seen, in absorption from the stellar photosphere and/or in emission from the disk.

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