A&A Supplement series, Vol. 127, January II 1998, 207-215
Received April 21; accepted May 5, 1997
photometry collected in March 1991
,G. Cutispoto
Send offprint request: G. Cutispoto
Osservatorio Astrofisico di Catania, V.le A.Doria 6,
I-95125 Catania, Italy
e-mail: gcutispoto@alpha4.ct.astro.it
In the framework of an extensive program focusing on the global properties and
evolution of active stars, high-precision photometry of 19
selected stars, collected at the European Southern Observatory over the
15-31 March 1991 interval is presented. Significant evolution of the light
curves, period variations and evidence for long-term variability of the global
degree of spottedness are found. Most of the spectral classifications are
discussed. A flare event was detected for the star HD 127535 = V 841 Cen.
These observations
contribute to the establishment of a time-extended photometric database which
can give important clues on topics such as the stability of spotted areas,
differential rotation, solar-like cycles and the correlation between
inhomogeneities at different atmospheric levels.
keywords: stars: activity -- stars: flare -- stars: late-type -- stars: variables -- techniques: photometric -- stars: HD 127535