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L.T. Laursen (Harvard-Smithsonian Center for Astrophysics), L.M. Macri (National Optical Astronomy Observatory)
We present the results of a photometric study of Hubble's Variable 19 (V19) in scanned archival photographic plates from the Asiago Observatory. The plates cover the period from 1973 to 1984, for which photometry of V19 is unpublished. V19 was classified as a Cepheid with a period of 54.7 days and an intensity-weighted mean B magnitude of 19.59±.23 mag with a B amplitude of 1.1 mag by Hubble in his studies of M33. The recovery of V19 as part of the DIRECT project found the amplitude reduced to less than 0.1 mag and a mean B magnitude of 19.08±.05 mag. This study finds an amplitude of less than 0.1 mag and a mean B magnitude of 19.23±.1 mag for the time period covered by the plates.
The author(s) of this abstract have provided an email address for comments about the abstract: llaursen@cfa.harvard.edu
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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.