Fig. 3

Classification spectra of the three O-type stars found in the field. Star a805 shows signs of high luminosity, such as the strong N iii emission and filled-in He ii 4686 Å. This object is close to being a supergiant. C81 and B201 have lower luminosities. There is some evidence of (at least) a second, later-type star in the spectrum of C81, but this cannot be ascertained with the existing spectrum.
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