Abstract
WITH objective prisms used on a Schmidt telescope, faint late type stars may be identified with a dispersion of 1,700 Å mm−1, at the atmospheric A band, on photographic plates sensitive in the near infrared spectral region. The required spectral classification techniques were developed by J. J. Nassau and various collaborators1–3. These techniques were used by Westerlund4,5 with the Mt Stromolo-Uppsala 50/66-cm Schmidt telescope to survey the M-type supergiants in the Large Magellanic Cloud (LMC). Westerlund found relatively large numbers of early type M stars brighter than mi = 13.0 in the photometric system of Kron, Gascoigne and White6.
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BLANCO, V., MARTIN F. MCCARTHY, S. Late type giants in Large Magellanic Cloud. Nature 258, 407–408 (1975). https://doi.org/10.1038/258407a0
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DOI: https://doi.org/10.1038/258407a0
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