期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 402, 期 1, 页码 L54-L58出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1745-3933.2009.00799.x
关键词
radiation mechanisms: non-thermal; gamma rays: bursts; gamma-rays: theory
资金
- JSPS
- NASA [NNX08AL40G]
- MEXT of Japan [21740184, 19104006, 19740139, 21105509, 21684014, 18740147, 19047004]
- Grants-in-Aid for Scientific Research [19740139, 21684014, 18740147, 21105509, 19104006, 21740184, 19047004] Funding Source: KAKEN
We study high-energy gamma-ray afterglow emission from gamma-ray bursts (GRBs) in the prior emission model, which is proposed to explain the plateau phase of the X-ray afterglow. This model predicts the high-energy gamma-ray emission when the prompt GRB photons from the main flow are up-scattered by relativistic electrons accelerated at the external shock due to the prior flow. The expected spectrum has the peak of similar to 10-100 GeV at around the end time of the plateau phase for typical GRBs, and high-energy gamma-rays from nearby and/or energetic GRBs can be detected by the current and future Cherenkov telescopes such as MAGIC, VERITAS, CTA and possibly Fermi. Multiwavelength observations by ground-based optical telescopes as well as Fermi and/or Swift satellites are important to constrain the model. Such external inverse-Compton emission may even lead to GeV-TeV gamma-ray signals with the delay time of similar to 10-100 s, only if the plateau phase is short lived.
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