New Main-Sequence Luminosity Functions for Globular Clusters Journal Articles uri icon

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abstract

  • We report new results from a program which is aimed at obtaining deep CCD photometry for a sample of relatively nearby globular clusters having a wide range of metallicities. The CCD cameras on the CFHT 3.6 m, CTIO 4 m and KPNO 4 m telescopes have been used over the past 4 years to obtain deep exposures in regions of a number of clusters. In order to avoid the severest crowding, all of our observations have been obtained at distances of greater than ~ 5 core radii from the cluster centers. The images have been analysed by using the DAOPHOT point-spread-function fitting routines.

authors

  • McClure, Robert D
  • Stetson, Peter B
  • Hesser, James E
  • Smith, Graham H
  • Harris, William Edgar
  • VandenBerg, Don A

publication date

  • 1988