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Early optical afterglow lightcurves of neutron-fed Gamma-ray bursts
Y. Z. Fan, B. Zhang, D. M. Wei
In this paper, within the popular internal shock scenario of GRBs, we calculate the early optical afterglow lightcurves of a neutron-fed GRB fireball for different assumed neutron…
Variabilities of Gamma-Ray Burst Afterglows: Long-acting Engine, Anisotropic Jet or Many Fluctuating Regions?
Kunihito Ioka, Shiho Kobayashi, Bing Zhang
We show that simple kinematic arguments can give limits on the timescale and amplitude of variabilities in gamma-ray burst (GRB) afterglows, especially when the variability timesca…
Global Test of a Quasi-Universal Gamma-Ray Burst Jet Model Through Monte-Carlo Simulations
Xinyu Dai, Bing Zhang
The possibility that long gamma-ray burst (GRB) jets are structured receives growing attention recently, and we have suggested that most GRBs and their softer, less energetic frate…
On the Kinetic Energy and Radiative Efficiency of Gamma-Ray Bursts
Nicole M. Lloyd-Ronning, Bing Zhang
Using measured X-ray luminosities to 17 Gamma-Ray Bursts (GRBs) during the afterglow phase and accounting for radiative losses, we calculate the kinetic energy of these bursts and…