Flat Spectrum Gamma Ray Burst Afterglows
arXiv:astro-ph/0104250
Abstract
Temporal behaviour of GRB afterglow light curve is derived for the case where the electron energy distribution is relatively flat, with the power-law index p lying between 1.0 and 2.0. It is shown that the expected behaviour will be the same as that for p>2.0 if the upper cutoff in the electron energy distribution evolves in direct proportion to the bulk Lorentz factor of the blast wave.
8 pages, uses basi.sty (included). Revised according to referees' comments. Added discussion on Dai & Cheng (2001) astro-ph/0105055. Accepted for publication in Bull. Astr. Soc. India