ejaavso126

Optical Time-Series Photometry of the Peculiar Nova CSS081007:030559+054715

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Matthew Templeton

AAVSO Headquarters, 49 Bay State Road, Cambridge, MA 02138

Robert Koff

980 Antelope Drive West, Bennett, CO 80102

Patrick Wils

Aarschotsebaan 31, Hever B-3191, Belgium

Arne Henden

AAVSO Headquarters, 49 Bay State Road, Cambridge, MA 02138

Abstract
We present an analysis of optical photometry of the transient optical
and X-ray source CSS081007:030559+054715. Unfiltered CCD observations were
made between 2008 December 17 and December 30 (JD 2454817.5 to 2454830.5),
showing variability at the level of 0.5 magnitude. Time-series analyses of these
data confirm the existence of the 1.77-day period detected in X-ray, UV, and optical
wavelengths by the Swift satellite. The maxima of the optical and X-ray emission
appear to be out of phase.