A new globular cluster black hole in NGC 4472

@article{Maccarone2010ANG,
  title={A new globular cluster black hole in NGC 4472},
  author={Thomas J. Maccarone and Arunav Kundu and Stephen E. Zepf and Katherine L. Rhode},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2010},
  volume={410},
  pages={1655-1659}
}
We discuss CXOU 1229410+075744, a new black hole candidate in a globular cluster in the elliptical galaxy NGC 4472. By comparing two Chandra observations of the galaxy, we find a source that varies by at least a factor of 4, and has a peak luminosity of at least 2 x 10 39 erg s -1 . As such, the source varies by significantly more than the Eddington luminosity for a single neutron star, and is a strong candidate for being a globular cluster black hole. The source's X-ray spectrum also evolves… 

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