scholarly journals Neutrino fluence from gamma-ray bursts: off-axis view of structured jets

2019 ◽  
Vol 490 (4) ◽  
pp. 4935-4943 ◽  
Author(s):  
Markus Ahlers ◽  
Lea Halser
Keyword(s):  
Gravitational Wave ◽  
Angular Dependence ◽  
Gamma Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Scaling Relation ◽  
Model Predictions ◽  
Wave Event ◽  
Axis View

ABSTRACT We investigate the expected high-energy neutrino fluence from internal shocks produced in the relativistic outflow of gamma-ray bursts. Previous model predictions have primarily focused on on-axis observations of uniform jets. Here, we present a generalization to account for arbitrary viewing angles and jet structures. Based on this formalism, we provide an improved scaling relation that expresses off-axis neutrino fluences in terms of on-axis model predictions. We also find that the neutrino fluence from structured jets can exhibit a strong angular dependence relative to that of gamma-rays and can be far more extended. We examine this behaviour in detail for the recent short gamma-ray burst GRB 170817A observed in coincidence with the gravitational wave event GW170817.

A search for high-energy gamma rays (?1015 eV) associated with gamma ray bursts

1982 ◽  
Vol 83 (1-2) ◽  
pp. 279-286 ◽  
Author(s):  
R. W. Clay ◽  
P. R. Gerhardy ◽  
A. G. Gregory
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals High-energy neutrinos from the gravitational wave event GW150914 possibly associated with a short gamma-ray burst

2016 ◽  
Vol 93 (12) ◽  
Author(s):  
Reetanjali Moharana ◽  
Soebur Razzaque ◽  
Nayantara Gupta ◽  
Peter Mészáros
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Burst ◽  
Wave Event ◽  
High Energy Neutrinos

Very high-energy gamma rays from gamma-ray bursts

2007 ◽  
Vol 365 (1854) ◽  
pp. 1343-1356 ◽  
Author(s):  
Paula M Chadwick
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Gamma Ray Burst ◽  
Gamma Ray Astronomy ◽  
High Energy Gamma ◽  
Very High Energy ◽  
Energy Gamma ◽  
Very High

Very high-energy (VHE) gamma-ray astronomy has undergone a transformation in the last few years, with telescopes of unprecedented sensitivity having greatly expanded the source catalogue. Such progress makes the detection of a gamma-ray burst at the highest energies much more likely than previously. This paper describes the facilities currently operating and their chances for detecting gamma-ray bursts, and reviews predictions for VHE gamma-ray emission from gamma-ray bursts. Results to date are summarized.

scholarly journals VERY HIGH-ENERGY NEUTRINOS FROM SLOWLY DECAYING, MASSIVE DARK MATTER AS A SOURCE OF EXPLOSIVE ENERGY FOR GAMMA-RAY BURSTS

2003 ◽  
Vol 18 (07) ◽  
pp. 477-489
Author(s):  
SAUL BARSHAY ◽  
GEORG KREYERHOFF
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Dense Matter ◽  
High Energy ◽  
Wide Distribution ◽  
Gamma Ray Bursts ◽  
Moderate Degree ◽  
X Rays ◽  
Very High Energy ◽  
Total Energies

We consider a speculative model for gamma-ray bursts (GRB), which predicts that the total kinetic energy in the ejected matter is less than the total energy in the gamma rays. There is also secondary energy in X-rays, which are emitted contemporaneously with the gamma rays. The model suggests that bremsstrahlung and Compton up-scattering by very energetic electrons, are important processes for producing the observed burst radiation. The dynamics naturally allows for the possibility of a moderate degree of beaming of matter and radiation in some gamma-ray bursts. GRB are predicted to have an intrinsically wide distribution in total energies, in particular, on the low side. They are predicted to occur at large redshifts, z ~ 8, in local regions of dense matter.

scholarly journals Gravitational-wave follow-up with CTA after the detection of GRBs in the TeV energy domain

2019 ◽  
Vol 490 (3) ◽  
pp. 3476-3482 ◽  
Author(s):  
I Bartos ◽  
K R Corley ◽  
N Gupte ◽  
N Ash ◽  
Z Márka ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
The United States ◽  
High Energy ◽  
Cherenkov Telescopes ◽  
Wave Event ◽  
Energy Domain ◽  
Time Requirements ◽  
High Energy Emission

ABSTRACT The recent discovery of TeV emission from gamma-ray bursts (GRBs) by the MAGIC and H.E.S.S. Cherenkov telescopes confirmed that emission from these transients can extend to very high energies. The TeV energy domain reaches the most sensitive band of the Cherenkov Telescope Array (CTA). This newly anticipated, improved sensitivity will enhance the prospects of gravitational-wave follow-up observations by CTA to probe particle acceleration and high-energy emission from binary black hole and neutron star mergers, and stellar core-collapse events. Here we discuss the implications of TeV emission on the most promising strategies of choice for the gravitational-wave follow-up effort for CTA and Cherenkov telescopes more broadly. We find that TeV emission (i) may allow more than an hour of delay between the gravitational-wave event and the start of CTA observations; (ii) enables the use of CTA’s small size telescopes that have the largest field of view. We characterize the number of pointings needed to find a counterpart. (iii) We compute the annual follow-up time requirements and find that prioritization will be needed. (iv) Even a few telescopes could detect sufficiently nearby counterparts, raising the possibility of adding a handful of small-sized or medium-sized telescopes to the network at diverse geographic locations. (v) The continued operation of VERITAS/H.E.S.S./MAGIC would be a useful compliment to CTA’s follow-up capabilities by increasing the sky area that can be rapidly covered, especially in the United States and Australia, in which the present network of gravitational-wave detectors is more sensitive.

GAMMA-RAY AND NEUTRINO SPECTRA IN GRBs

2009 ◽  
Vol 18 (10) ◽  
pp. 1557-1560
Author(s):  
KATSUAKI ASANO
Keyword(s):  
Gamma Rays ◽  
Gamma Ray ◽  
Extreme Values ◽  
Detection Efficiency ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Ultra High Energy ◽  
Strong Magnetic Fields ◽  
High Energy Cosmic Rays ◽  
Neutrino Detection

Gamma-ray bursts (GRBs) are the possible sources of ultra-high-energy cosmic rays (UHECRs), because of the extreme values of ultra-relativistic velocities and strong magnetic fields. In this paper we review the validity of GRBs as sources of UHECRs, and introduce our recent detailed studies of gamma-rays and neutrinos due to UHECRs utilizing comprehensive Monte Carlo codes. Future observations such as Fermi, ground-based telescopes and other facilities may provide constraints on the UHECR acceleration efficiency in GRBs. We also show a preliminary result of neutrino detection efficiency from a GRB with JEM-EUSO.

scholarly journals Electromagnetic Precursors of Short Gamma-Ray Bursts as Counterparts of Gravitational Waves

Galaxies ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 104
Author(s):  
Jie-Shuang Wang ◽  
Liang-Duan Liu
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
Gamma Ray ◽  
Interaction Model ◽  
Gamma Ray Bursts ◽  
Opening Angle ◽  
Local Universe ◽  
Wave Event ◽  
Low Mass ◽  
Electromagnetic Precursors

Precursor emissions are found in some short gamma-ray bursts (SGRBs). In this paper, we review the theories and observations of the SGRB precursor and discuss its prospect as an electromagnetic counterpart of the gravitational wave event produced by neutron star (NS) mergers. The observed luminosity, spectrum, and duration of precursors are explained by the magnetospheric interaction model during the inspiral or the cocoon/jet shock breakout model during the jet propagation. In general, these two models predict that the precursor will be weaker than the main GRB, but will be of a larger opening angle, which makes it an advantageous gamma-ray counterpart for NS mergers in the local Universe, especially for NS - black hole mergers with very low mass ratios, in which the main GRBs are not expected. The joint observation of the precursor, SGRB, and gravitational wave will help to reveal the jet launch mechanism and post-merger remnant.

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