Implications of the Radio Afterglow from the Gamma-Ray Burst of 1997 May 8

  title={Implications of the Radio Afterglow from the Gamma-Ray Burst of 1997 May 8},
  author={Eli Waxman and Shrinivas R. Kulkarni and Dale A. Frail},
  journal={The Astrophysical Journal},
  pages={288 - 293}
Radio observations of the afterglow of the γ-ray burst GRB 970508 provide unique new constraints on afterglow models. The quenching of diffractive scintillation at ~4 weeks delay provides the first direct estimate of source size and expansion rate. It implies an apparent size R ~ 1017 cm and an expansion at a speed comparable to that of light at t ~ 4 weeks, in agreement with the fireball model prediction, R = 1017(t/week)5/8 cm. The radio flux and its dependence on time and frequency at 1-5… 

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