Positions of the candidate stars earlier than B1 listed in Table 2, superimposed on an archive Spitzer image at 5.8 μm. The southernmost star in Table 2, at RA(2000) = 18:21:16.15, Dec(2000) = −14:55:36.2, is just outside the boundary of the field presented here in a zone that was not covered by Spitzer, and it is not plotted in the figure.
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