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Eclipsing Binaries in the Open Cluster NGC 2243 - I. Photometry

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Kaluzny J. , Krzeminski W. , Thompson I. B. , Stachowski G.

Acta Astronomica

2006

tom Vol. 56, No. 1

51--63

We obtained BV time series photometry for 12 variable stars from the field of the old open cluster NGC 2243. The sample includes 3 newly identified detached/semi-detached binaries. There are now four detached eclipsing binaries which are likely members of the cluster. Determination of the absolute parameters of the components would provide a valuable check on evolutionary models of low-mass stars. An accurate ephemeris and orbital period analysis are presented for the previously-known detached binary NV CMa. We also provide ephemerides for seven other periodic variables. We show that three contact binaries are likely members of the cluster.