Results 41 to 50 of about 72,034 (329)

Very-high-energy Gamma-Ray Afterglows of GRB 201015A and GRB 201216C

open access: yesThe Astrophysical Journal, 2023
Gamma-ray bursts (GRBs) 201015A and 201216C are valuable cases where very-high-energy (VHE) gamma-ray afterglows have been detected. By analyzing their prompt emission data, we find that GRB 201216C is an extremely energetic, long GRB with a hard gamma ...
Lu-Lu Zhang   +3 more
doaj   +1 more source

Short Gamma Ray Bursts as possible electromagnetic counterpart of coalescing binary systems [PDF]

open access: yes, 2010
Coalescing binary systems, consisting of two collapsed objects, are among the most promising sources of high frequency gravitational waves signals detectable, in principle, by ground-based interferometers.
A. Abramovici   +38 more
core   +1 more source

A Broken “α–intensity” Relation Caused by the Evolving Photosphere Emission and the Nature of the Extraordinarily Bright GRB 230307A

open access: yesThe Astrophysical Journal Letters, 2023
GRB 230307A is one of the brightest gamma-ray bursts detected so far. With the excellent observation of GRB 230307A by the Fermi Gamma-ray Burst Monitor, we can reveal the details of prompt emission evolution.
Yun Wang   +4 more
doaj   +1 more source

The design of a gamma‐ray burst polarimeter [PDF]

open access: yes, 1993
The study of the polarization properties of the gamma‐ray bursts is the one remaining unexplored avenue of research which may help to answer some of the fundamental problems regarding the nature of these mysterious objects. We have designed an instrument
Forrest, D J   +3 more
core   +2 more sources

GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst

open access: yesThe Astrophysical Journal Letters, 2023
We report the discovery of the unusually bright long-duration gamma-ray burst (GRB), GRB 221009A, as observed by the Neil Gehrels Swift Observatory (Swift), Monitor of All-sky X-ray Image, and Neutron Star Interior Composition Explorer Mission.
Maia A. Williams   +55 more
doaj   +1 more source

Anisotropy in the sky distributions of the short and intermediate gamma-ray bursts: Breakdown of the cosmological principle? [PDF]

open access: yes, 2009
After the discovery of the anisotropy in the sky-distribution of intermediate gamma-ray bursts recently also the distribution of the short gamma-ray bursts is proven to be anisotropic.
A. Meszaros   +6 more
core   +2 more sources

CLOAKED GAMMA-RAY BURSTS [PDF]

open access: yesThe Astrophysical Journal, 2014
accepted for publication in the Astrophysical ...
openaire   +2 more sources

Model Constraints Based on the IceCube Neutrino Nondetection of GRB 221009A

open access: yesThe Astrophysical Journal, 2023
GRB 221009A is a bright gamma-ray burst (GRB) with isotropic energy larger than 10 ^54 erg. Its fairly low redshift makes it a promising candidate for high-energy neutrino detection.
Shunke Ai, He Gao
doaj   +1 more source

Are There MeV Gamma-Ray Bursts? [PDF]

open access: yes, 1995
It is often stated that gamma-ray bursts (GRBs) have typical energies of several hundred keV. Is this a real feature of GRBs or is it due to an observational bias?
Narayan, Ramesh, Piran, Tsvi
core   +3 more sources

Gamma-Ray Burst Energetics [PDF]

open access: yesThe Astrophysical Journal, 1999
We estimate the fraction of the total energy in a Gamma-Ray Burst (GRB) that is radiated in photons during the main burst. Random internal collisions among different shells limit the efficiency for converting bulk kinetic energy to photons. About 1% of the energy of explosion is converted to radiation, in 10-1000 kev energy band in the observer frame ...
openaire   +2 more sources

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