New constraints on gamma-ray burst jet geometry and relativistic shock physics

@article{Guidorzi2014NewCO,
  title={New constraints on gamma-ray burst jet geometry and relativistic shock physics},
  author={C. Guidorzi and C. Mundell and R. Harrison and R. Margutti and V. Sudilovsky and B. Zauderer and S. Kobayashi and A. Cucchiara and A. Melandri and S. Pandey and E. Berger and D. Bersier and V. D’Elia and A. Gomboc and J. Greiner and J. Japelj and D. Kopa{\vc} and B. Kumar and D. Malesani and C. Mottram and P. O’Brien and A. Rau and R. Smith and I. Steele and N. Tanvir and F. Virgili},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={438},
  pages={752-767}
}
We use high–quality, multi-band observations of Swift GRB120404A, from γ-ray to radio frequencies, together with the new hydrodynamics code of van Eerten et al. (2012) to test the standard synchrotron shock model. The evolution of the radio and optical afterglow, with its prominent optical rebrightening at trest � 260–2600 s, is remarkably well modelled by a decelerating jet viewed close to the jet edge, combined with some early re–energization of the shock. We thus constrain the geometry of… Expand
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