MeV absorption in gamma-ray bursts as a probe of their progenitor environments
G. Oganesyan, Om Sharan Salafia, Emanuele Sobacchi, Samanta Macera et autres
A small fraction of X-ray photons from gamma-ray bursts (GRBs), after escaping the relativistic jet, are scattered by electrons in the circumburst medium. Subsequent photon–photon absorption between the incoming MeV γ-rays and the back-scattered X-rays generates electron–positron pairs, enriching the surrounding medium …
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