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M. Dahl, R.E. Stencel (U.Denver), S. Howell (NOAO/WIYN)
With the discovery of an increasing number of planets around other stars, it is expected that some fraction of these will produce transit events. Open clusters provide a large sample of stars with potential planets in a compact portion of sky, allowing for more efficient monitoring. During 2005 summer, we began a series of observations to search for transiting planets in open clusters, specifically NGC 6791. Using the University of Denver’s Mt. Evans twin 0.72 meter telescopes, we obtained V+R band CCD data on several nights during several months on this particular cluster. These data were reduced for instrumental magnitudes using Source Extractor, DAOPHOT/IRAF and IDL methods, and millimag precision achieved when nights were photometric. We were able to confirm the short period and low amplitude for previously described variable V522 Lyr, but find variable V518 Lyr does not conform to previous description. We will report on other low amplitude, transit-like variation among stars in NGC 6791. We acknowledge the Marsico Initiative Visiting Scholar Fund [SH]and the bequest of William Herschel Womble to the University of Denver, for partial support of this research.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.