Fermi Gamma-ray Space Telescope

Multi-wavelength study of Fermi-LAT GRB 100414A: comparison of fireball models, inferences on the central engine

A. Moin
S. Razzaque, J. C. Greiner, D. A. Frail, M. Wieringa, L. Hanlon, D. Buckley, B. van Soelen, P. Meintjes, D. Murphy, A. Martin-Carrillo, M. Boettcher, S. J. Tingay

Abstract:

We present results of ongoing multi-wavelength studies of GRB 100414A within the scope of which, we analysed the afterglow behavior in X-ray to radio bands and estimated upper limits on parameters such as afterglow energy, size and speed. A comparison of prompt emission energy release and the late-time afterglow energy favors the adiabatic fireball model. A brief re-brightening of the radio afterglow at late-times leads to an inference that the GRB central engine might still be active during the afterglow phase and it could likely be an accretion driven system that re-energized the afterglow. We will also describe the interplay between the aforementioned inferences and the results of the GRB 100414A multi-wavelength light-curve and SED modeling. ?.