Results 61 to 70 of about 68,957 (199)
COSMIC-RAYS AND GAMMA RAY BURSTS
EAS Publications Series, 2013 Cosmic-rays are subatomic particles of energies ranging between a few eV to hundreds of TeV. These particles register a power-law spectrum, and it seems that most of them originate from astrophysical galactic and extragalactic sources. The shock acceleration in superalfvenic astrophysical plasmas, is believed to be the main mechanism responsible for ...
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Gamma-Ray Burst Progenitors [PDF]
Space Science Reviews, 2016 We review our current understanding of the progenitors of both long and short duration gamma-ray bursts (GRBs). Constraints can be derived from multiple directions, and we use three distinct strands; i) direct observations of GRBs and their host galaxies, ii) parameters derived from modeling, both via population synthesis and direct numerical ...
Levan, Andrew +5 more
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Electron Signal Induced by GRB 221009A on Charged Particle Telescopes of POES and MetOp Satellites
The Astrophysical Journal, 2023 GRB 221009A is a long gamma-ray burst among the most energetic and nearest ( z = 0.151) detected so far. The energy fluence of the burst was so large to cause ionization of the upper layers of Earth’s atmosphere and also observable signals in satellite ...
V. Vitale +20 more
doaj +1 more source
CLOAKED GAMMA-RAY BURSTS [PDF]
The Astrophysical Journal, 2014 It is suggested that many $γ$-ray bursts (GRBs) are cloaked by an ultra-relativistic baryonic shell that has high optical depth when the photons are manufactured. Such a shell would not fully block photons reflected or emitted from its inner surface, because the radial velocity of the photons can be less than that of the shell. This avoids the standard
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, 2009 After the launch and successful beginning of operations of the FERMI satellite, the topics related to high-energy observations of gamma-ray bursts have obtained a considerable attention by the scientific community.
A. Antonelli +10 more
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The nature of “dark” gamma-ray bursts [PDF]
Astronomy & Astrophysics, 2010 9 pages, 6 figs, A&A (accepted)
J. Greiner +16 more
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Gamma-ray Bursts: 50 Years and Counting!
UniverseGamma-ray bursts were discovered by the Vela satellites in the late 1960s, but they were announced for the first time exactly 50 years ago, in 1973. The history of our understanding of gamma-ray bursts can be subdivided into several eras.
Alessandro Armando Vigliano +1 more
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VLBI and Archival VLA and WSRT Observations of the GRB 030329 Radio Afterglow
, 2012 We present VLBI and archival Karl G. Jansky Very Large Array (VLA) and Westerbork Synthesis Radio Telescope (WSRT) observations of the radio afterglow from the gamma-ray burst (GRB) of 2003 March 29 (GRB 030329) taken between 672 and 2032 days after the ...
Berger +37 more
core +1 more source
Observations of GRB 990123 by the Compton Gamma-Ray Observatory [PDF]
, 1999 GRB 990123 was the first burst from which simultaneous optical, X-ray and gamma-ray emission was detected; its afterglow has been followed by an extensive set of radio, optical and X-ray observations.
A. Connors +22 more
core +3 more sources
Gamma-ray Bursts and Afterglow [PDF]
Symposium - International Astronomical Union, 2000 The origin of GRBs has been a mystery for almost 30 years. Their sources emit a huge amount of energy on short time scales, and the process involves extreme relativistic motion with a bulk Lorentz factor of at least a few hundred. In the last two years, “afterglow” emission in X-ray, optical, IR, and radio was detected. The afterglow can be measured up
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