M31 Globular Clusters in the Hubble Space Telescope Archive. I. Cluster Detection and Completeness

  title={M31 Globular Clusters in the Hubble Space Telescope Archive. I. Cluster Detection and Completeness},
  author={Pauline Barmby and John Peter Huchra},
  journal={The Astronomical Journal},
  pages={2458 - 2468}
Globular clusters at the distance of M31 have apparent angular sizes of a few arcseconds. While many M31 globular clusters have been detected and studied from ground-based images, the high spatial resolution of the Hubble Space Telescope (HST) allows much more robust detection and characterization of star cluster properties. We present the results of a search of 157 HST Wide Field Planetary Camera 2 images of M31. We found 82 previously cataloged globular cluster candidates, as well as 32 new… 
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