TY - JOUR
T1 - High-energy γ-ray emission from gamma-ray bursts - Before GLAST
AU - Fan, Yi Zhong
AU - Piran, Tsvi
PY - 2008/9
Y1 - 2008/9
N2 - Gamma-ray bursts (GRBs) are short and intense emission of soft γ-rays, which have fascinated astronomers and astrophysicists since their unexpected discovery in 1960s. The X-ray/optical/radio afterglow observations confirm the cosmological origin of GRBs, support the fireball model, and imply a long-activity of the central engine. The high-energy γ-ray emission (> 20 MeV) from GRBs is particularly important because they shed some lights on the radiation mechanisms and can help us to constrain the physical processes giving rise to the early afterglows. In this work, we review observational and theoretical studies of the high-energy emission from GRBs. Special attention is given to the expected high-energy emission signatures accompanying the canonical early-time X-ray afterglow that was observed by the Swift X-ray Telescope. We also discuss the detection prospect of the upcoming GLAST satellite and the current ground-based Cerenkov detectors.
AB - Gamma-ray bursts (GRBs) are short and intense emission of soft γ-rays, which have fascinated astronomers and astrophysicists since their unexpected discovery in 1960s. The X-ray/optical/radio afterglow observations confirm the cosmological origin of GRBs, support the fireball model, and imply a long-activity of the central engine. The high-energy γ-ray emission (> 20 MeV) from GRBs is particularly important because they shed some lights on the radiation mechanisms and can help us to constrain the physical processes giving rise to the early afterglows. In this work, we review observational and theoretical studies of the high-energy emission from GRBs. Special attention is given to the expected high-energy emission signatures accompanying the canonical early-time X-ray afterglow that was observed by the Swift X-ray Telescope. We also discuss the detection prospect of the upcoming GLAST satellite and the current ground-based Cerenkov detectors.
KW - Afterglows
KW - Gamma-ray bursts (GRBs)
KW - Radiation mechanisms: nonthermal
KW - Relativity
KW - Shock waves
UR - http://www.scopus.com/inward/record.url?scp=47049130443&partnerID=8YFLogxK
U2 - 10.1007/s11467-008-0033-z
DO - 10.1007/s11467-008-0033-z
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AN - SCOPUS:47049130443
SN - 1673-3487
VL - 3
SP - 306
EP - 330
JO - Frontiers of Physics in China
JF - Frontiers of Physics in China
IS - 3
ER -