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The Search For Stellar Variability In M67: Ensemble Photometry with the Burrell Schmidt Telescope

  • Michael D. Joner (a1), Eric G. Hintz (a1), Thomas Stephens (a1), Kenneth A. Nelson (a1), Helen Moore (a1) and J. Ward Moody (a1)...

Abstract

We have analyzed time-series data for 160 stars in the old open cluster M67. Approximately 400 CCD frames from two nights on the Burrell Schmidt have been reduced differentially relative to an ensemble of seventeen stable stars. We present data on two new variables and evidence of four new suspected variable stars in M67.

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Copyright

References

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Gilliland, R.L. & Brown, T.M., 1992, AJ, 103, 1945
Gilliland, R.L., Brown, T.M., Duncan, D.R., Suntzeff, N.B., Lockwood, G.W., Thompson, D.T., Schild, R.E., Jeffrey, W.A. & Penprase, B.E., 1991, AJ, 101, 541
Joner, M.D. & Taylor, B.J., 1990, PASP, 102, 1004
Montgomery, R.A., Marschall, L.A. & Janes, K.A., 1993, AJ, 106, 181

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