Astrophysics: Black holes in a spin

@article{Reynolds2013AstrophysicsBH,
  title={Astrophysics: Black holes in a spin},
  author={Christopher S. Reynolds},
  journal={Nature},
  year={2013},
  volume={494},
  pages={432-433}
}
The implications of the X-ray emission patterns of galaxies hosting supermassive black holes have been contentious. Data from NASA's NuSTAR telescope seem to resolve the issue — at least for one such galaxy. See Letter p.449 

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