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Fig. 3.
K-band spectra of additional giant and main sequence cluster members; these have been rebinned to improve the S/N. Comparison spectra for O6 V (HD 5689), O6.5 III (HD 190864), ON8 V (HD 13268) and O9.5 V (HD 37468) are overplotted in red and from Hanson et al. (2005).
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