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A Photometric Study of the Newly Discovered Eclipsing Cataclysmic Variable SDSS J040714.78–064425.1

Published online by Cambridge University Press:  05 March 2013

T. Ak ,
A. Retter ,
A. Liu  and
H. H. Esenoğlu
T. Ak*
Affiliation:
Istanbul University, Faculty of Science, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey
A. Retter
Affiliation:
Pennsylvania State University, Department of Astronomy and Astrophysics, University Park, PA 16802-6305, USA University of Sydney, School of Physics, Sydney NSW 2006, Australia
A. Liu
Affiliation:
Norcape Observatory, PO Box 300, Exmouth WA 6707, Australia
H. H. Esenoğlu
Affiliation:
Istanbul University Observatory Research and Application Center, 34119 Beyazıt, Istanbul, Turkey
*
FCorresponding author. Email: [email protected]
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Abstract

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We present the results obtained from unfiltered photometric CCD observations of the newly discovered cataclysmic variable SDSS J040714.78–064425.1 made during seven nights in 2003 November. We establish the dwarf nova nature of the object as it was in outburst during our observations. We also confirm the presence of deep eclipses with a period of 0.17017 ± 0.00003 d in the optical light curve of the star. In addition, we found periods of 0.166 ± 0.001 d and possibly also 5.3 ± 0.7 d in the data. The 0.17017 d periodicity is consistent within the errors with the proposed orbital period of 0.165 and 0.1700 d. Using the known relation between the orbital and superhump periods, we interpret the 0.166 and 5.3 d periods as the negative superhump and the nodal precession period respectively. SDSS J040714.78–064425.1 is then classified as a negative superhump system with one of the largest orbital periods.

Keywords

accretion, accretion discsstars: individual (SDSS J040714.78–064425.1)dwarf novaenovae, cataclysmic variables
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 22 , Issue 2 , 2005 , pp. 105 - 110
Copyright
Copyright © Astronomical Society of Australia 2005

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