CAOSP abstracts, Volume: 22, year: 1992
- Author(s): WENZEL, W.; HUDEC, R.; SCHULT, R.; TREMKO, J.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 22, p. 69-80.
- Date: 07/1992
- Title: The investigation of TT Arietis at the beginning of its present active state
- Keyword(s): STARS: NOVAE AND CATACLYSMIC VARIABLES
- Pages: 69 -- 80
Abstract:
Results of an extended program of optical monitoring and simultaneous and
quasi-simultaneous optical observations of TT Ari, begun in 1985 in order to
support the EXOSAT X-ray observations of this object in its active state are
presented. The object was observed on August 21/22, 1985 both in X-ray and
optical wavelengths. Optical photometric and some spectroscopic data were
obtained at more than 10 observatories. The measurements were taken up
immediately after the return of TT Ari to its active (high) state
(m ~ 10.75) after having been more than 5.5 years in the very low state
(m ~ 13-16). The transition from low to present high state occured in ~100 days
with a mean brightening rate of 0.04 mag/day. The long-time optical light
curves as well as detailed orbital curves obtained and at around times of X-ray
measurements and data on the stability of the photometric period are presented
and discussed.
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