The ACS Survey Of Galactic Globular Clusters. VII. Relative Ages

@article{MarnFranch2009TheAS,
  title={The ACS Survey Of Galactic Globular Clusters. VII. Relative Ages},
  author={Antonio Mar{\'i}n-Franch and Antonio Aparicio and Giampaolo Piotto and Alfred Rosenberg and Brian Chaboyer and Ata Sarajedini and Michael H. Siegel and Jay Anderson and Luigi R. Bedin and Aaron Dotter and Maren Hempel and Ivan R. King and Steven R. Majewski and Antonino P. Milone and Nathaniel E. Q. Paust and I. N. Reid},
  journal={The Astrophysical Journal},
  year={2009},
  volume={694},
  pages={1498-1516}
}
The ACS Survey of Galactic globular clusters is a Hubble Space Telescope Treasury program designed to provide a new large, deep, and homogeneous photometric database. Based on observations from this program, we have measured precise relative ages for a sample of 64 Galactic globular clusters by comparing the relative position of the clusters' main-sequence (MS) turnoffs, using MS fitting to cross-compare clusters within the sample. This method provides relative ages to a formal precision of 2… 
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