UVBY PHOTOMETRY OF THETA-CORONAE-BOREALIS DURING 1994 AND 1995

We present differential uvby photometry of theta CrB obtained in 1994 and 1995, complemented by Balmer line spectroscopy. This star has been constant during this period, showing no short term periodic variabili ty 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 presen t in the spectra. The only remarkable event observed was a fading epis ode on JD 2449779, with an amplitude of about 0.02 magnitudes in all b andpasses and duration of 0.2 - 0.3 days.