uvby photometry of Coronae Borealis during 1994 and 1995*
Juan Fabregat 1 and
Saul J. Adelman 2
Received 21 July 1997 / Accepted 27 August 1997
We present differential uvby photometry of CrB obtained in 1994 and 1995, complemented by Balmer line spectroscopy. This star has been constant during this period, showing no short term periodic variability with an amplitude greater than 0.005 mag., nor long term variations greater than 0.01 mag. The lack of variability is associated with an inactive phase of the Be star, in which no emision features are present in the spectra.
The only remarkable event observed was a fading episode on JD 2449779, with an amplitude of about 0.02 magnitudes in all bandpasses and duration of 0.2 - 0.3 days.
Key words: stars: emission-line, Be stars: individual: CrB
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© European Southern Observatory (ESO) 1998
Online publication: December 8, 1997