A rapidly spinning supermassive black hole at the centre of NGC 1365

@article{Risaliti2013ARS,
  title={A rapidly spinning supermassive black hole at the centre of NGC 1365},
  author={Guido Risaliti and Fiona A. Harrison and Kristin K. Madsen and Dominic J. Walton and Steven E. Boggs and F. E. Christensen and William W. Craig and Brian W. Grefenstette and Charles James Hailey and Emanuele Nardini and Daniel Stern and W. W. Zhang},
  journal={Nature},
  year={2013},
  volume={494},
  pages={449-451}
}
Broad X-ray emission lines from neutral and partially ionized iron observed in active galaxies have been interpreted as fluorescence produced by the reflection of hard X-rays off the inner edge of an accretion disk. In this model, line broadening and distortion result from rapid rotation and relativistic effects near the black hole, the line shape being sensitive to its spin. Alternative models in which the distortions result from absorption by intervening structures provide an equally good… 
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