%0 Journal Article
%T Electron-Positron Pair Cascades and Precursors in Gamma-Ray Bursts
%A P. Meszaros
%A E. Ramirez-Ruiz
%A M. J. Rees
%J Physics
%D 2000
%I arXiv
%R 10.1086/321404
%X Gamma-ray burst sources with a high luminosity can produce electron-positron pair cascades in their environment as a result of back-scattering of a seed fraction of their original hard spectrum. The resulting spectral modifications offer the possibility of diagnosing not only the compactness parameter of the gamma-ray emitting region but also the baryonic density of the environment external to the burst.
%U http://arxiv.org/abs/astro-ph/0011284v3