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T. McKay, C. Akerlof (U. Michigan), R. Balsano, J. Bloch, D. Casperson, G. Gisler (LANL), R. Kehoe (U. Michigan), B. Lee (Fermilab), S. Marshall (LLNL), E. Rykoff, D.A. Smith (U. Michigan), J. Szymanski, J. Wren (LANL), ROTSE Collaboration
We have performed a preliminary optical survey of short timescale variability with the ROTSE-I telephoto array. The data sample is divided into two parts. The first is a survey of 256 square degrees (~120k sources) imaged every 80 s for a cumulative 20 hrs to a sensitivity of approximately magnitude 15.5. The second is a similarly sensitive survey of 512 square degrees (~250k sources) imaged every 80 s (with 7 minute gaps) for a total of approximately 60 hrs. A further 0.4 mag. increase in sensitivity is obtained by co-adding these frames in pairs. We have identified a variety of new variable stars in this sample, including many Delta Scuti stars and contact binaries. Preliminary characterization of these sources will be presented.
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The author(s) of this abstract have provided an email address for comments about the abstract: tamckay@umich.edu