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The Open Cluster NGC 2516. I. Optical Photometry
Sung et al. 2002 The Astronomical Journal 123 290.
Caption: Fig. 4.
UV excess and X‐ray activity measured by the X‐ray luminosity. A triangle, square, and circle indicate an F‐, G‐, and K‐type star, respectively.
© 2002. The American Astronomical Society. All rights reserved. Printed in U.S.A.