The possible orbital period of the nova V1493 Aquilae

¹ Departement of Physics, Faculty of Materials Science and Technology, Slovak University of Technology in Bratislava, Paulínska 16, 91724 Trnava, The Slovak Republic e-mail: andrej.dobrotka@stuba.sk
² Institut d'Astrophysique de Paris, 98 bis boulevard Arago, 75014 Paris, France e-mail: fried@iap.fr
³ Departement of Astronomy and Astrophysics, Penn State University, 525 Davey Lab, University Park, PA, 16802-6305, USA e-mail: retter@astro.psu.edu
⁴ School of Physics, University of Sydney, 2006, Australia
⁵ Astronomical Institute of the Slovak Academy of Sciences, 05960 Tatranská Lomnica, The Slovak Republic e-mail: hric@ta3.sk
⁶ Nicholas Copernicus Observatory and Planetarium in Brno, Kraví Hora 2, 61600 Brno, Czech Republic e-mail: novak@hvezdarna.cz

Received: 7 January 2004
Accepted: 8 November 2005

Abstract

Aims.Period analysis of CCD photometry of V1493 Aql (Nova Aql 1999 No. 1) performed during 12 nights through I and R filters a few weeks after maximum is presented.Methods.The PDM method for period analysis (Stellingwerf 1978, ApJ, 224, 953) is used.Results.The photometric data is modulated with a period of  d. Following the sinusoidal shape of the phased light curve, we interpret this periodicity as possibly orbital in nature and that is consistent with a cataclysmic variable above the period gap.