AAS 205th Meeting, 9-13 January 2005
Session 14 Variable Stars and Stellar Oscillations
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[14.06] Stellar Variability in the Young, Metal Rich Open Cluster NGC 2301

C. VanOutryve (NOAO / UC Berkeley), S. B. Howell (WIYN / NOAO), J. L. Tonry (Inst. for Astronomy, U of Hawaii)

Using an Orthogonal Transfer CCD camera (OPTIC), we observed the young, metal rich open cluster NCG 2301 over a 14 night period in Feb. 2004. Six adjacent fields centered on the cluster were observed in sequence each night with a field repeat cadence of about 12 minutes. Our photometric precision was near 1-2 mmag for the top 5 magnitudes of dynamic range of the detector, a vast improvement over normal CCD observations. Using a reduced chi-squared of greater than three as our determining variability statistic, we find that 56% of all our point sources are variable. Of these variables, 64% are periodic (at a 99% confidence level). Details on this variability in terms of stellar type, cluster location, etc. will be presented and discussed. Partial support of this research was provided by the NSF.

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© 2004. The American Astronomical Society.