Results 1 to 10 of about 452 (208)

Pre-burst neutrinos of gamma-ray bursters accompanied by high-energy photons

open access: yesPhysics Letters B, 2021
Previous researches on high-energy neutrino events from gamma-ray bursters (GRBs) suggest a neutrino speed variation v(E)=c(1±E/ELVν) with ELVν=(6.4±1.5)×1017 GeV, together with an intrinsic time difference Δtin=(−2.8±0.7)×102 s, which means that high ...
Jie Zhu, Bo-Qiang Ma
doaj   +3 more sources

The Central Engine of Gamma-Ray Bursters [PDF]

open access: yesAstrophysical Journal, 1998
GRBs are thought to arise in relativistic blast-wave shocks at distances of 10 to 1000 AU from the point where the explosive energy is initially released. To account for the observed duration and variability of the gamma-ray emission in most GRBs, a central engine powering the shocks must remain active for several seconds to many minutes but must ...
W Kluźniak, M Ruderman
exaly   +3 more sources

How Far Away Are Gamma-Ray Bursters? [PDF]

open access: yesPublications of the Astronomical Society of the Pacific, 1995
The positions of over 1000 gamma-ray bursts detected with the BATSE experiment on board of the Compton Gamma Ray Observatory are uniformly and randomly distributed in the sky, with no significant concentration to the galactic plane or to the galactic center.
exaly   +3 more sources

Gamma-ray bursters at cosmological distances

open access: yesAstrophysical Journal, 1986
It is proposed that some, perhaps most, gamma-ray bursters are at cosmological distances, like quasars, with a redshift of about 1 or 2. This proposition requires a release of supernova-like energy of about 10 to the 51st ergs within less than 1 s, making gamma-ray bursters the brightest objects known in the universe, many orders of magnitude brighter ...
B Paczynski
exaly   +2 more sources

Femtolensing of gamma-ray bursters

open access: yesAstrophysical Journal, 1992
If gamma-ray bursters are at cosmological distances, they can be used to probe for «femtolenses» extremely small (∼10 −13 -10 −16 M ⊙ ) dark-matter objects. The time delay induced by such a lens would be ∼10 −17 -10 −20 s, approximately equal to the period of a gamma ray.
exaly   +2 more sources

Gamma-ray bursters as sources of cosmic rays [PDF]

open access: yesAstroparticle Physics, 1996
The little we do know of the physical conditions in gamma-ray bursters makes them conducive to the acceleration of high-energy cosmic rays, especially if they are at cosmological distances. We find that, with the observed statistics and fluxes of gamma-ray bursts, cosmological bursters may be an important source of cosmic rays in two regions of the ...
Mordehai Milgrom
exaly   +3 more sources

Nonthermal Radiation of Cosmological Gamma‐Ray Bursters

open access: yesAstrophysical Journal, 2000
37 pages, 11 figures, submitted to ...
Vladimir V Usov
exaly   +3 more sources

Classification of BATSE, Swift, and Fermi Gamma-Ray Bursts from Prompt Emission Alone

open access: yesThe Astrophysical Journal, 2023
Although it is generally assumed that there are two dominant classes of gamma-ray bursts (GRBs) with different typical durations, it has been difficult to classify GRBs unambiguously as short or long from summary properties such as duration, spectral ...
Charles L. Steinhardt   +3 more
doaj   +1 more source

Coalescing neutron stars as gamma ray bursters? [PDF]

open access: yesAstrophysics and Space Science, 1995
extended abstract contribution to the proceedings of the 17th Texas Symposium, 2 pages, uuencoded compressed postscript.
Ruffert, M.   +3 more
openaire   +3 more sources

Limits on Fast Radio Burst–like Counterparts to Gamma-Ray Bursts Using CHIME/FRB

open access: yesThe Astrophysical Journal, 2023
Fast radio bursts (FRBs) are a class of highly energetic, mostly extragalactic radio transients lasting for ∼milliseconds. While over 600 FRBs have been published so far, their origins are presently unclear, with some theories for extragalactic FRBs ...
Alice P. Curtin   +23 more
doaj   +1 more source

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