CAOSP abstracts, Volume: 22, year: 1992
- Author(s): HUDEC, R.; BOJACK, W.; CRISTESCU, C.; DUMITRESCU, A.; FUHRMANN, B.;
GOETZ, W.; GRZELCZYK, H.; HACKE, G.; HUTH, H.; KOZHEVNIKOV, V.P.;
KUMSIASHVILI, M.I.; LOVAS, M.; MRKOS, A.; OPRESCU, G.; PATKOS, L.; PERESTY, R.;
PFAU, W.; REIMANN, H.-G.; RICHTER, G.; ROESSIGER, S.; SPYCHKA, I.V.;
SCHULT, R.; STECKLUM, B.; TOTH, I.; TREMKO, J.; VALNICEK, B.; VERDENET, M.;
WENZEL W.
- Journal: Contributions of the Astronomical Observatory Skalnate Pleso,
vol. 22, p. 81-106.
- Date: 07/1992
- Title: A simultaneous X-ray and optical study of TT Arietis during its active state. X-ray observations and discussion
- Keyword(s): STARS: NOVAE AND CATACLYSMIC VARIABLES
- Pages: 81 -- 106
Abstract:
We present results of X-ray observations of TT Ari with the EXOSAT satellite
on August 21/22, 1985. This paper represents the second part of the publication
of the results obtained with our extended program of optical monitoring and
simultaneous optical and X-ray observations of TT Ari. For the first part,
which includes optical results, see Wenzel et al. (1992). Optical photometric
and partly spectroscopic data were obtained at more than 10 observatories. The
measurements were carried out immediately after the return of TT Ari to its
optically active (high) state after being more than 5.5 years in the very low
state. The results represent the first detailed simultaneous X-ray and optical
study of TT Ari in the high state. The most important results of our analysis
are (i) the mean X-ray flux was found to be surprisingly stable over long time
intervals, not changing by more than several tens of per cent and not
reflecting the large optical intensity changes between the active and inactive
states and (ii) absorption dips were detected in the light curve. The results
are discussed from the point of view of the model of the system.
Full text version of this article in
PDF.
