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Issue A&A
Volume 391, Number 2, August IV 2002
Page(s) 565 - 569
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20020704



A&A 391, 565-569 (2002)
DOI: 10.1051/0004-6361:20020704

Discovery and photometric study of the new in-the-gap SU UMa Dwarf Nova Var 73 Dra

S. V. Antipin1 and E. P. Pavlenko2

1  Sternberg Astronomical Institute (SAI), 13, University Ave., Moscow 119992, Russia and Isaac Newton Institute of Chile, Moscow Branch, Russia
    e-mail: antipin@sai.msu.ru
2  Crimean Astrophysical Observatory, Nauchny, 98409 Crimea, Ukraine and Isaac Newton Institute of Chile, Crimean Branch, Ukraine
    e-mail: pavlenko@crao.crimea.ua

(Received 19 April 2002 / Accepted 6 May 2002)

Abstract
We present the discovery and the first investigation of the new dwarf nova Var 73 Dra. We carried out monitoring and time-resolved CCD observations in 2001 August-October and detected several normal outbursts with a recurrence time of about 7-8 days and one slightly brighter superoutburst with a "plateau" phase that lasted 13 days. Our photometry during the superoutburst clearly shows the presence of superhumps with the period 0.0954 ( $\pm 0.0001$) day (although the one-day alias period, 0.1053 d, could not be ruled out). So, the observed features allow us to classify Var 73 Dra as a new SU UMa-type dwarf nova within the well-known gap of orbital period distribution of cataclysmic variables.


Key words: stars: dwarf novae -- stars: individual: Var73 Dra

Offprint request: E. P. Pavlenko, pavlenko@crao.crimea.ua




© ESO 2002

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