Methods for improving open cluster fundamental parameters applied to M 52 and NGC 3960

  title={Methods for improving open cluster fundamental parameters applied to M 52 and NGC 3960},
  author={Charles J Bonatto and E. Bica},
  journal={Astronomy and Astrophysics},
Aims. We derive accurate parameters related to the CMD, structure and dynamical state of M 52 and NGC 3960, whose fields are affected by differential reddening. Previous works estimated their ages in the ranges 35-135 Myr and 0.5-1.0 Gyr, respectively. Methods. J, H and K, 2MASS photometry with errors <0.2 mag is used to build CMDs, radial density profiles, luminosity and mass functions, and correct for differential reddening. Field-star decontamination is applied to uncover the cluster's… 

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