scholarly journals INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational-wave Event GW170817

2017 ◽  
Vol 848 (2) ◽  
pp. L15 ◽  
Author(s):  
V. Savchenko ◽  
C. Ferrigno ◽  
E. Kuulkers ◽  
A. Bazzano ◽  
E. Bozzo ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Prompt Gamma ◽  
Wave Event

scholarly journals SHORT GAMMA-RAY BURST FORMATION RATE FROM BATSE DATA USINGEp-LpCORRELATION AND THE MINIMUM GRAVITATIONAL-WAVE EVENT RATE OF A COALESCING COMPACT BINARY

2014 ◽  
Vol 789 (1) ◽  
pp. 65 ◽  
Author(s):  
Daisuke Yonetoku ◽  
Takashi Nakamura ◽  
Tatsuya Sawano ◽  
Keitaro Takahashi ◽  
Asuka Toyanago
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Event Rate ◽  
Formation Rate ◽  
Gamma Ray Burst ◽  
Compact Binary ◽  
Wave Event

scholarly journals Low-Γ jets from Compact Binary Mergers as Candidate Electromagnetic Counterparts to Gravitational Wave Sources

2016 ◽  
Vol 12 (S324) ◽  
pp. 66-69
Author(s):  
Gavin P. Lamb ◽  
Shiho Kobayashi
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Ambient Medium ◽  
Radioactive Decay ◽  
Prompt Gamma ◽  
Late Time ◽  
Astrophysical Jets ◽  
Power Law Distribution ◽  
Compact Binary ◽  
Binary Mergers

AbstractCompact binary mergers, with neutron stars or neutron star and black-hole components, are thought to produce various electromagnetic counterparts: short gamma-ray bursts (GRBs) from ultra-relativistic jets followed by broadband afterglow; semi-isotropic kilonova from radioactive decay of r-process elements; and late time radio flares; etc. If the jets from such mergers follow a similar power-law distribution of Lorentz factors as other astrophysical jets then the population of merger jets will be dominated by low-Γ values. The prompt gamma-rays associated with short GRBs would be suppressed for a low-Γ jet and the jet energy will be released as X-ray/optical/radio transients when a shock forms in the ambient medium. Using Monte Carlo simulations, we study the properties of such transients as candidate electromagnetic counterparts to gravitational wave sources detectable by LIGO/Virgo. Approximately 78% of merger-jets result in failed GRB with optical peaks 14-22 magnitude and an all-sky rate of 2-3 per year.

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

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.

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.

scholarly journals A Late-time Galaxy-targeted Search for the Radio Counterpart of GW190814

2021 ◽  
Vol 923 (1) ◽  
pp. 66
Author(s):  
K. D. Alexander ◽  
G. Schroeder ◽  
K. Paterson ◽  
W. Fong ◽  
P. Cowperthwaite ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Compact Object ◽  
Opening Angle ◽  
Field Energy ◽  
Constant Density ◽  
Late Time ◽  
Magnetic Field Energy ◽  
Community Interest ◽  
Wave Event

Abstract GW190814 was a compact object binary coalescence detected in gravitational waves by Advanced LIGO and Advanced Virgo that garnered exceptional community interest due to its excellent localization and the uncertain nature of the binary’s lighter-mass component (either the heaviest known neutron star, or the lightest known black hole). Despite extensive follow-up observations, no electromagnetic counterpart has been identified. Here, we present new radio observations of 75 galaxies within the localization volume at Δt ≈ 35–266 days post-merger. Our observations cover ∼32% of the total stellar luminosity in the final localization volume and extend to later timescales than previously reported searches, allowing us to place the deepest constraints to date on the existence of a radio afterglow from a highly off-axis relativistic jet launched during the merger (assuming that the merger occurred within the observed area). For a viewing angle of ∼46° (the best-fit binary inclination derived from the gravitational wave signal) and assumed electron and magnetic field energy fractions of ϵ e = 0.1 and ϵ B = 0.01, we can rule out a typical short gamma-ray burst-like Gaussian jet with an opening angle of 15° and isotropic-equivalent kinetic energy 2 × 1051 erg propagating into a constant-density medium n ≳ 0.1 cm−3. These are the first limits resulting from a galaxy-targeted search for a radio counterpart to a gravitational wave event, and we discuss the challenges—and possible advantages—of applying similar search strategies to future events using current and upcoming radio facilities.

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.

scholarly journals Unveiling the enigma of ATLAS17aeu

2019 ◽  
Vol 621 ◽  
pp. A81
Author(s):  
A. Melandri ◽  
A. Rossi ◽  
S. Benetti ◽  
V. D’Elia ◽  
S. Piranomonte ◽  
...  
Keyword(s):  
Black Hole ◽  
Gravitational Wave ◽  
Gamma Ray ◽  
Spectral Energy Distribution ◽  
Spectroscopic Properties ◽  
Host Galaxy ◽  
Spectral Energy ◽  
Binary Black Hole ◽  
Wave Event ◽  
Optical Light Curve

Aims. The unusual transient ATLAS17aeu was serendipitously detected within the sky localisation of the gravitational wave trigger GW 170104. The importance of a possible association with gravitational waves coming from a binary black hole merger led to an extensive follow-up campaign, with the aim of assessing a possible connection with GW 170104. Methods. With several telescopes, we carried out both photometric and spectroscopic observations of ATLAS17aeu, for several epochs, between ∼3 and ∼230 days after the first detection. Results. We studied in detail the temporal and spectroscopic properties of ATLAS17aeu and its host galaxy. Although at low significance and not conclusive, we found similarities to the spectral features of a broad-line supernova superposed onto an otherwise typical long-GRB afterglow. Based on analysis of the optical light curve, spectrum, and host galaxy spectral energy distribution, we conclude that the redshift of the source is probably z ≃ 0.5 ± 0.2. Conclusions. While the redshift range we have determined is marginally compatible with that of the gravitational wave event, the presence of a supernova component and the consistency of this transient with the Ep–Eiso correlation support the conclusion that ATLAS17aeu was associated with the long gamma-ray burst GRB 170105A. This rules out the association of the GRB 170105A/ATLAS17aeu transient with the gravitational wave event GW 170104, which was due to a binary black hole merger.

scholarly journals INTEGRAL UPPER LIMITS ON GAMMA-RAY EMISSION ASSOCIATED WITH THE GRAVITATIONAL WAVE EVENT GW150914

2016 ◽  
Vol 820 (2) ◽  
pp. L36 ◽  
Author(s):  
V. Savchenko ◽  
C. Ferrigno ◽  
S. Mereghetti ◽  
L. Natalucci ◽  
A. Bazzano ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Upper Limits ◽  
Wave Event ◽  
Gamma Ray Emission
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