1208.1790 (P. Veres et al.)

The extremely high peak energy of GRB 110721A in the context of a dissipative photosphere synchrotron emission model    [PDF]

P. Veres, B. -B. Zhang, P. Mészáros

The Fermi observations of GRB 110721A (The Fermi LAT Collaboration et al. 2012) have revealed an unusually high peak energy $\sim 15$ MeV in the first time bin of the prompt emission. We find that an interpretation is unlikely in terms of internal shock models, and confirm that a standard black-body photospheric model also falls short. We show that dissipative photospheric synchrotron models, on the other hand, are able to accommodate such high peak values.

View original: http://arxiv.org/abs/1208.1790