On choosing the start time of binary black hole ringdowns

  title={On choosing the start time of binary black hole ringdowns},
  author={S. Bhagwat and M. Okounkova and S. Ballmer and Duncan A. Brown and M. Giesler and M. Scheel and S. Teukolsky},
  journal={Physical Review D},
The final stage of a binary black hole merger is ringdown, in which the system is described by a Kerr black hole with quasinormal mode perturbations. It is far from straightforward to identify the time at which the ringdown begins. Yet determining this time is important for precision tests of the general theory of relativity that compare an observed signal with quasinormal mode descriptions of the ringdown, such as tests of the no-hair theorem. We present an algorithmic method to analyze the… Expand
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