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Astron. Astrophys. 340, L31-L34 (1998)

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Letter to the Editor

The eclipsing cataclysmic variable GS Pavonis: Evidence for disk radius changes *

P.J. Groot 1, T. Augusteijn 2, O. Barziv 1, 3 and J. van Paradijs 1, 4

1 Astronomical Institute `Anton Pannekoek'/CHEAF, Kruislaan 403, 1098 SJ, Amsterdam, The Netherlands
2 European Southern Observatory, Casilla 19001, Santiago 19, Chile
3 European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748, Garching bei München, Germany
4 Physics Department, University of Alabama in Huntsville, Huntsville, USA

Received 23 September 1998 / Accepted 21 October 1998

Abstract

We have obtained differential time series photometry of the cataclysmic variable GS Pavonis over a timespan of 2 years. These show that this system is deeply eclipsing ([FORMULA]2-3.5 mag) with an orbital period of 3.72 hr. The eclipse depth and out-of-eclipse light levels are correlated. From this correlation we deduce that the disk radius is changing and that the eclipses in the low state are total. The derived distance to GS Pav is 790[FORMULA]90 pc, with a height above the galactic plane of 420[FORMULA]60 pc. We classify GS Pav as a novalike system.

Key words: Binaries:eclipsing – stars: GS Pav – cataclysmic variables

* Based on observations with the 0.9m Dutch telescope at ESO, Chile

Send offprint requests to: Paul Groot (paulgr@astro.uva.nl)

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© European Southern Observatory (ESO) 1998

Online publication: November 9, 1998
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