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Critical tests of stellar evolution in open clusters. I. New photometry and radial velocities for NGC 3680
1996
Astronomy and Astrophysics Supplement Series
We present new CCD photometry in the b and y colours of the Strömgren uvby system for 310 stars in a 13 ×13 field centered on the intermediate-age open cluster NGC 3680. Careful cross-checks indicate that previously published BV photometry of NGC 3680 is affected by random and/or systematic errors precluding its use in critical comparison with theoretical isochrone computations. Detailed notes on several individual stars are given. In addition, we present ≈ 400 new photoelectric radial-velocity
doi:10.1051/aas:1996208
fatcat:32ym7rg7nncpplhthi4uvmwixu