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B[e] Stars pp 53-54 | Cite as

Tycho Photometry of some B[e] Stars

  • M. Floquet
  • J. L. Halbwachs
  • A. M. Hubert
Chapter
  • 106 Downloads
Part of the Astrophysics and Space Science Library book series (ASSL, volume 233)

Abstract

The Tycho experiment was launched with the Hipparcos satellite andP rovided two-colour photometry B T and V T for more than one million stars brighter than V T =11.5 mag (ESA 1997, ESA SP-1200) . These two filters are roughly centered on the B and V Johnson filters. A simple linear transformation exists between Tycho B T and VT magnitudes and B and V magnitudes in the Johnson photometric system (see ESA 1997) . The Tycho Epoch Photometry Annex A contains the B T and V T magnitudes measured for each Tycho observation of the known variable stars. In the present paper, these measurements are corrected for the bias described in ESA SP-1200, Vol. 4, chapter 9 (pg 133).

Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • M. Floquet
    • 1
  • J. L. Halbwachs
    • 2
  • A. M. Hubert
    • 1
  1. 1.URA 335 du CNRS, DASGALObservatoire de Paris-MeudonMeudon CedexFrance
  2. 2.Observatoire de StrasbourgStrasbourgFrance

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