Hubble's Variable 19 in the Asiago Photographic Plates

Details Hubble's Variable 19 in the Asiago Photographic Plates Hubble's Variable 19 in the Asiago Photographic Plates

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.5409l&link_type=abstract

American Astronomical Society Meeting 205, #54.09; Bulletin of the American Astronomical Society, Vol. 36, p.1428

Astronomy and Astrophysics

Astronomy

Scientific paper

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 The plates cover the period from 1973 to 1984, for which photometry of V19 is unpublished.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±0.23 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±0.05 mag. This study finds an amplitude of less than 0.1 mag and a mean B magnitude of 19.23±0.1 mag for the time period covered by the plates.

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