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Leptonic and Hadronic Models for the Extra Components in Fermi-LAT GRBs
Katsuaki Asano, Peter Mészáros, Kohta Murase +2
{\it Fermi} satellite has detected extra spectral components in GeV energy range in several GRBs. Those components have power-law shapes, which may contribute to also X-ray band. T…
Spectral-Temporal Simulations of Internal Dissipation Models of Gamma-Ray Bursts
Katsuaki Asano, Peter Meszaros
We present calculations of the time evolution of the prompt spectra of gamma-ray burst models involving generic internal dissipation regions, including internal shocks, either by i…
The Role of Stochastic Acceleration in the Prompt Emission of Gamma-Ray Bursts: Application to Hadronic Injection
Kohta Murase, Katsuaki Asano, Toshio Terasawa +1
We study effects of particle re-acceleration (or heating) in the post-shock region via magnetohydrodynamic/plasma turbulence, in the context of a mixed hadronic-leptonic model for…
Neutrino initiated cascades at mid and high altitudes in the atmosphere
A. D. Supanitsky, G. Medina-Tanco
High energy neutrinos play a very important role for the understanding of the origin and propagation of ultra high energy cosmic rays (UHECR). They can be produced as a consequence…
Detection of a spectral break in the extra hard component of GRB 090926A
Fermi-LAT, Fermi-GBM collaborations
We report on the observation of the bright, long gamma-ray burst, GRB 090926A, by the Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on board the \Fermi\…