Transition from fireball to Poynting-flux-dominated outflow in the three-episode GRB 160625B

@article{Zhang2016TransitionFF,
  title={Transition from fireball to Poynting-flux-dominated outflow in the three-episode GRB 160625B},
  author={B.-B. Zhang and B. B. Zhang and Alberto J. Castro-Tirado and Z. G. Dai and P. H. Thomas Tam and X.-Y. Wang and Y.-D. Hu and Sergey Karpov and Alexei Pozanenko and F.-W. Zhang and Elena Mazaeva and Pavel Minaev and Alina A. Volnova and Samantha R. Oates and H. Gao and X.-F. Wu and L. Shao and Qing-Wen Tang and Gregory M. Beskin and Anton Biryukov and Sergey Bondar and E. A. Ivanov and Elena Katkova and Nadezhda Orekhova and Alexey Perkov and V. Sasyuk and Lech Mankiewicz and Aleksander Filip Żarnecki and Arkadiusz {\'C}wiek and Rafał Opiela and Adam Zadrożny and R. L. Aptekar' and Dmitry D. Frederiks and Dmitry S. Svinkin and Anatoly Kusakin and Raguli Inasaridze and Otabek Burhonov and Vasilij Rumyantsev and E. V. Klunko and Alexander S. Moskvitin and Timur A. Fatkhullin and Vladimir V. Sokolov and Azamat F. Valeev and S. M. Jeong and Il Han Park and M D Caballero-Garc{\'i}a and Ronan Cunniffe and J. C. Tello and Patrizia Ferrero and Shashi Bhushan Pandey and Martin Jel{\'i}nek and Fang-Kun Peng and R. S{\'a}nchez-Ram{\'i}rez and A. Castell{\'o}n},
  journal={Nature Astronomy},
  year={2016},
  volume={2},
  pages={69-75}
}
The ejecta composition is an open question in gamma-ray burst (GRB) physics1. Some GRBs possess a quasi-thermal spectral component in the time-resolved spectral analysis2, suggesting a hot fireball origin. Others show a featureless non-thermal spectrum known as the Band function3–5, consistent with a synchrotron radiation origin5,6 and suggesting that the jet is Poynting-flux dominated at the central engine and probably in the emission region as well7,8. There are also bursts showing a sub… 

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