AAS 201st Meeting, January, 2003
Session 40. Normal and Dwarf Novae
Poster, Tuesday, January 7, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[40.11U] Systematics of Superhumps in the Short Supercycle SU UMa Dwarf Nova V1159 Ori

M.A. Pitts (Indiana Univ. and Ohio State Univ.), J.W. Robertson (Arkansas Tech Univ.), R.K. Honeycutt (Indiana University)

Lightcurves of the cataclysmic variable V1159 Orionis have been analyzied to study the outbursts, superoutbursts, and superhumps in this SU Uma-type dwarf nova. The data are merged from RoboScope observations over 7 years plus 3 years of CCD measures from amateur astronomers. The outbursts occur at an interval of ~4 days, with superoutbursts each 44.5 days. At times we find superhumps at all superoutburst phases, as well as a double-peaked structure within the star's ~0.06 day oscillations. These oscillations are often damped during the peaks of the normal outbursts, and a general strengthening occurs during superoutburst, peaking near the end of the superoutburst. This work was done as part of a summer REU program at Indiana University.

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