3 papers
astro-ph2004
A Unified Model of Short and Long Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes
Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura
Taking into account the recent suggestion that a short gamma-ray burst (GRB) looks like the first 1 sec of a long GRB, we propose that the jet of a GRB consists of multiple sub-jet…
astro-ph2004
Peak Energy-Isotropic Energy Relation in the Off-Axis Gamma-Ray Burst Model
Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura
Using a simple uniform jet model of prompt emissions of gamma-ray bursts (GRBs), we reproduce the observed peak energy--isotropic energy relation. A Monte Carlo simulation shows th…
astro-ph2002
Cosmological X-ray Flashes in the Off-Axis Jet Model
Ryo Yamazaki, Kunihito Ioka, Takashi Nakamura
The <V/Vmax> of the cosmological X-ray flashes detected by Wide Field Cameras on BeppoSAX is calculted theoretically in a simple jet model. The total emission energy from the jet i…