What have we learned about gamma ray bursts from afterglows?

Details What have we learned about gamma ray bursts from afterglows? What have we learned about gamma ray bursts from afterglows?

1999-11-30

arxiv.org/abs/astro-ph/9911523v1

Astronomy and Astrophysics

Astrophysics

Invited talk, to appear in Proceedings of the Conference X-ray Astronomy '999: Stellar Endpoints, AGNs and Diffuse Background,

Scientific paper

The discovery of GRBs' afterglows has allowed us to establish several facts: their distance and energy scales, the fact that they are due to explosions, that the explosions are relativistic, and that the afterglow emission mechanism is synchrotron radiation. On the other hand, recent data have shown that the fireball model is wrong when it comes to the emission mechanism of the true burst (which is unlikely to be synchrotron again) and that shocks are not external. Besides these relatively tame points, I will also discuss the less well established physics of the energy deposition mechanism, as well as the possible burst progenitors.

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