In order to power both the gravitational wave event and the gamma-ray burst, the twin black holes must have been born close together, with an initial separation of order the size of the Earth, and merged within minutes. – See more at: https://www.cfa.harvard.edu/news/2016-05#sthash.cEQqlodH.dpuf
In order to power both the gravitational wave event and the gamma-ray burst, the twin black holes must have been born close together, with an initial separation of order the size of Earth, and merged within minutes.