The Spin of the Near-Extreme Kerr Black Hole GRS 1915+105

  title={The Spin of the Near-Extreme Kerr Black Hole GRS 1915+105},
  author={Jeffrey E. McClintock and Rebecca Shafee and Ramesh Narayan and Ronald A. Remillard and Shane W. Davis and Li-xin Li},
  journal={The Astrophysical Journal},
Based on a spectral analysis of the X-ray continuum that employs a fully relativistic accretion disk model, we conclude that the compact primary of the binary X-ray source GRS 1915+105 is a rapidly rotating Kerr black hole. We find a lower limit on the dimensionless spin parameter of a* > 0.98. Our result is robust in the sense that it is independent of the details of the data analysis and insensitive to the uncertainties in the mass and distance of the black hole. Furthermore, our accretion… 
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