High-energy emission as a test of the prior emission model for gamma-ray burst afterglows

Kohta Murase, Kenji Toma, Ryo Yamazaki, Shigehiro Nagataki, Kunihito Ioka

Research output: Contribution to journalLetter

10 Citations (Scopus)

Abstract

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 ~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 ~10-100 s, only if the plateau phase is short lived.

Original languageEnglish (US)
Pages (from-to)L54-L58
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume402
Issue number1
DOIs
StatePublished - Feb 1 2010

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afterglows
gamma ray bursts
gamma rays
plateaus
plateau
energy
telescopes
time lag
energetics
shock
electron
test
photons
electrons
x rays

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Murase, Kohta ; Toma, Kenji ; Yamazaki, Ryo ; Nagataki, Shigehiro ; Ioka, Kunihito. / High-energy emission as a test of the prior emission model for gamma-ray burst afterglows. In: Monthly Notices of the Royal Astronomical Society: Letters. 2010 ; Vol. 402, No. 1. pp. L54-L58.
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abstract = "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 ~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 ~10-100 s, only if the plateau phase is short lived.",
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High-energy emission as a test of the prior emission model for gamma-ray burst afterglows. / Murase, Kohta; Toma, Kenji; Yamazaki, Ryo; Nagataki, Shigehiro; Ioka, Kunihito.

In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 402, No. 1, 01.02.2010, p. L54-L58.

Research output: Contribution to journalLetter

TY - JOUR

T1 - High-energy emission as a test of the prior emission model for gamma-ray burst afterglows

AU - Murase, Kohta

AU - Toma, Kenji

AU - Yamazaki, Ryo

AU - Nagataki, Shigehiro

AU - Ioka, Kunihito

PY - 2010/2/1

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N2 - 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 ~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 ~10-100 s, only if the plateau phase is short lived.

AB - 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 ~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 ~10-100 s, only if the plateau phase is short lived.

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