Astron. Astrophys. Suppl. Ser. 140, 29-53
Starspot photometry with robotic telescopes.
and by light curves of 47 active stars in
K.G. Strassmeier - E. Serkowitsch - Th. Granzer
Institut für Astronomie, Universität Wien,
Türkenschanzstraße 17, A-1180 Wien, Austria
e-mail: email@example.com, firstname.lastname@example.org,
Received March 15; accepted September 3, 1999
We present continuous multicolor photometry for 47 stars from October
1996 through June 1997. Altogether, 7073
, and by
points, each the average of three individual readings, were acquired with
three automatic photoelectric telescopes (APTs) at Fairborn Observatory in
southern Arizona. Most of our targets are chromospherically active single
and binary stars of spectral type G to K but there are also four
pre-main-sequence objects and three pulsating stars in our sample.
The light variability is generally due to rotational modulation of an
asymmetrically spotted stellar surface and therefore precise rotational
periods and their seasonal variations are determined from Fourier analysis.
We also report on photometric variations of
with a period of 0.44534 days. All data are available in numerical
Key words: stars: activity -- stars: late-type -- stars: rotation --
binaries: spectroscopic -- techniques: photometric
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