Rapid light variations of Be stars are difficult to be isolated in the ground-based observations due to amplitudes of a few 0.01 mag, periods close to one day, their non-sinusoidal character and their overlap on irregular variations on only little longer time scales.
Rapid light variations of Be stars are difficult to be isolated in the ground-based observations due to amplitudes of a few 0.01 mag, periods close to one day, their non-sinusoidal character and their overlap on irregular variations on only little longer time scales. (en)