Results 121 to 130 of about 249,735 (272)

Multiwavelength Analysis of the Supernova-associated Low-luminosity GRB 171205A

open access: yesThe Astrophysical Journal
Multiwavelength properties of the nearby supernova (SN)-associated low-luminosity GRB 171205A are investigated in depth to constrain its physical origin synthetically. The pulse width is found to be correlated with energy with a power-law index of −0.24 ±
Xiu-Juan Li   +3 more
doaj   +1 more source

The birth of black holes: neutron star collapse times, gamma-ray bursts and fast radio bursts [PDF]

open access: yes, 2014
Recent observations of short gamma-ray bursts (SGRBs) suggest that binary neutron star (NS) mergers can create highly magnetised, millisecond NSs. Sharp cut-offs in X-ray afterglow plateaus of some SGRBs hint at the gravitational collapse of these ...
V. Ravi, P. Lasky
semanticscholar   +1 more source

Significant Cocoon Emission and Photosphere Duration Stretching in GRB 211211A: A Burst from a Neutron Star−Black Hole Merger

open access: yesThe Astrophysical Journal
The radiation mechanism (thermal photosphere or magnetic synchrotron) and the progenitor of gamma-ray bursts (GRBs) are under hot debate. Recently discovered, the prompt long-duration (∼10 s, normally from the collapse of massive stars) property of GRB ...
Yan-Zhi Meng   +2 more
doaj   +1 more source

On the Gamma Ray Burst Origin of Extremely Energetic Cosmic Rays

open access: yes, 2009
Air shower experiments have detected cosmic ray events of energies upto 300 EeV. Most likely these cosmic rays have originated from compact objects. Their exact sources are yet to be identified.
Abraham   +39 more
core   +2 more sources

GAMMA-RAY BURSTS ARE OBSERVED OFF-AXIS [PDF]

open access: yes, 2014
We constrain the jet opening angle and, for the first time, the off-axis observer angle for gamma-ray bursts in the Swift-XRT catalog by using the ScaleFit package to fit afterglow light curves directly to hydrodynamic simulations.
G. Ryan   +3 more
semanticscholar   +1 more source

Neutron Star Merger Remnants: Braking Indices, Gravitational Waves, and the Equation Of State

open access: yes, 2019
The binary neutron star merger GW170817/GRB170817A confirmed that at least some neutron star mergers are the progenitors of short gamma-ray bursts. Many short gamma-ray bursts have long-term x-ray afterglows that have been interpreted in terms of post ...
Ashton, Greg   +2 more
core   +1 more source

Solving the inverse cosmological calibration problem of gamma-ray bursts [PDF]

open access: hybrid, 2023
S. I. Shirokov   +3 more
openalex   +1 more source

Swift Pointing and Gravitational-Wave Bursts from Gamma-Ray Burst Events

open access: yes, 2003
The currently accepted model for gamma-ray burst phenomena involves the violent formation of a rapidly rotating solar-mass black hole. Gravitational waves should be associated with the black-hole formation, and their detection would permit this model to ...
Finn, Lee Samuel   +2 more
core   +1 more source

GAMMA-RAY BURSTS [PDF]

open access: yesInternational Astronomical Union Colloquium, 2005
SummarySince their discovery in 1967 Gamma-ray bursts (GRBs) have been puzzling to astrophysicists. With the advent of a new generation of X–ray satellites in the late 90’s, it was possible to carry out deep multi-wavelength observations of the counterparts associated with the long duration GRBs class just within a few hours of occurrence, thanks to ...
openaire   +2 more sources

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