Decoding the final state in binary black hole mergers
  We demonstrate that in binary black hole mergers there is a direct correlation between the frequency of the gravitational wave at peak amplitude and the mass and spin of the final black hole. This correlation could potentially assist with the analysis of gravitational wave observations from binary black hole mergers. 
James Healy and Pablo Laguna and Deirdre Shoemaker
gr-qc astro-ph.CO astro-ph.HE