Photometry of the Dwarf Nova SDSS J094002.56+274942.0 in Outburst

Volume 38 number 1 (2010)

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Tom Krajci

Astrokolkhoz Observatory, P.O. Box 1351, Cloudcroft, New Mexico 88317

Patrick Wils

Vereniging Voor Sterrenkunde, Aarschotsebaan 31, Hever, B-3191, Belgium

Abstract

Data from the first observed outburst of the dwarf nova SDSS J094002.56+274942.0 show cyclical variations increasing in amplitude when the object fades. These variations are likely due to the ellipsoidal shape of the red dwarf and possibly also eclipses of the accretion disk. An orbital period of 3.92 hours is derived.