Results 31 to 40 of about 197,179 (303)
Gamma-Ray Burst Jet Breaks Revisited [PDF]
Astrophysical Journal, 2018 Gamma-ray Burst (GRB) collimation has been inferred with the observations of achromatic steepening in GRB light curves, known as jet breaks. Identifying a jet break from a GRB afterglow light curve allows a measurement of the jet opening angle and true ...
Xiang-Gao Wang +6 more
semanticscholar +1 more source
A DECADE OF SHORT-DURATION GAMMA-RAY BURST BROADBAND AFTERGLOWS: ENERGETICS, CIRCUMBURST DENSITIES, AND JET OPENING ANGLES [PDF]
, 2015 We present a comprehensive catalog and analysis of broadband afterglow observations for 103 short-duration gamma-ray bursts (GRBs), comprised of all short GRBs from 2004 November to 2015 March with prompt follow-up observations in the X-ray, optical ...
W. Fong +4 more
semanticscholar +1 more source
Observational constraints on the structure of gamma-ray burst jets [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Motivated by GW170817 we examine constraints that observations put on the angular structure of long gamma-ray burst (GRB) jets. First, the relatively narrow observed distribution of $E_{X}/E_{\gamma}$ (the isotropic equivalent early X-ray afterglow to ...
P. Beniamini, E. Nakar
semanticscholar +1 more source
THE THIRD FERMI GBM GAMMA-RAY BURST CATALOG: THE FIRST SIX YEARS [PDF]
, 2016 Since its launch in 2008, the Fermi Gamma-ray Burst Monitor (GBM) has triggered and located on average approximately two γ-ray bursts (GRBs) every three days.
P. N. Bhat +32 more
semanticscholar +1 more source
The Observer's Guide to the Gamma-Ray Burst-Supernova Connection [PDF]
, 2016 We present a detailed report of the connection between long-duration gamma-ray bursts (GRBs) and their accompanying supernovae (SNe). The discussion presented here places emphasis on how observations, and the modelling of observations, have constrained ...
Z. Cano +3 more
semanticscholar +1 more source
In vacuo dispersion features for gamma-ray-burst neutrinos and photons [PDF]
Nature Astronomy, 2016 Over the past 15 years there has been considerable interest in the possibility of quantum-gravity-induced in vacuo dispersion, the possibility that spacetime itself might behave essentially like a dispersive medium for particle propagation.
G. Amelino-Camelia +3 more
semanticscholar +1 more source
Light speed variation from gamma ray burst GRB 160509A
Physics Letters B, 2016 It is postulated in Einstein's relativity that the speed of light in vacuum is a constant for all observers. However, the effect of quantum gravity could bring an energy dependence of light speed.
Haowei Xu, Bo-Qiang Ma
doaj +1 more source
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 ...
A. Levan +5 more
semanticscholar +1 more source
The Fermi GBM gamma-ray burst time-resolved spectral catalog: brightest bursts in the first four years [PDF]
, 2016 We aim to obtain high-quality time-resolved spectral fits of gamma-ray bursts (GRBs) observed by the Gamma-ray Burst Monitor (GBM) on board the Fermi Gamma-ray Space Telescope.
Hoi-Fung Yu +19 more
semanticscholar +1 more source
Polarized Emission from Gamma-Ray Burst Jets
Galaxies, 2017 I review how polarization signals have been discussed in the research field of Gamma-Ray Bursts (GRBs). I mainly discuss two subjects in which polarimetry enables us to study the nature of relativistic jets.
Shiho Kobayashi
doaj +1 more source