Results 101 to 110 of about 255,861 (341)

Spectra of a recent bright burst measured by CGRO-COMPTEL: GRB 990123 [PDF]

open access: yes, 2000
CGRO-COMPTEL measures gamma-ray burst positions, time-histories and spectra in the 0.1–30 MeV energy range, in both imaging “telescope” and single detector “burst spectroscopy” mode.
Bennett, K   +13 more
core   +3 more sources

Simultaneous X-Ray, Gamma-Ray, and Radio Observations of the Repeating Fast Radio Burst FRB 121102 [PDF]

open access: yes, 2017
We undertook coordinated campaigns with the Green Bank, Effelsberg, and Arecibo radio telescopes during Chandra X-ray Observatory and XMM-Newton observations of the repeating fast radio burst FRB 121102 to search for simultaneous radio and X-ray bursts ...
P. Scholz   +25 more
semanticscholar   +1 more source

Supernovae and Gamma-Ray Bursts [PDF]

open access: yesChinese Journal of Astronomy and Astrophysics, 2006
I review the observational status of the Supernova/Gamma-Ray Burst (GRB) connection. Available data suggest that Supernovae (SNe) associated with GRBs form an heterogeneous class of objects including bright and faint hypernovae (Hyp) and perhaps also `standard' Ib/c events.
openaire   +3 more sources

Cosmology with gamma-ray bursts

open access: yesAstronomical and Astrophysical Transactions, 2022
Gamma-ray bursts constitute one of the most fascinating and relevant phenomena in modern science, with strong implications for several fields of astrophysics, cosmology and fundamental physics. In this short review, I focus on the prospective key-role of GRBs for cosmology. Indeed, the huge luminosity, the redshift distribution extending at least up
openaire   +2 more sources

Reclassification of gamma-ray bursts [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2001
We have applied two different automatic classifier algorithms to the BATSE Current GRB Catalog data and we obtain three different classes of GRBs. Our results confirm the existence of a third, intermediate class of GRBs, with mean duration \sim 25-50 s, as deduced from a cluster analysis and from a neural network algorithm.
Ramon Canal   +3 more
openaire   +4 more sources

Gamma-ray Bursts: 50 Years and Counting!

open access: yesUniverse
Gamma-ray bursts were discovered by the Vela satellites in the late 1960s, but they were announced for the first time exactly 50 years ago, in 1973. The history of our understanding of gamma-ray bursts can be subdivided into several eras.
Alessandro Armando Vigliano   +1 more
doaj   +1 more source

Gamma-Ray Bursts Observed with the Spectrometer SPI Onboard INTEGRAL

open access: yes, 2004
The spectrometer SPI is one of the main detectors of ESA's INTEGRAL mission. The instrument offers two interesting and valuable capabilities for the detection of the prompt emission of Gamma-ray bursts.
Beckmann, V.   +3 more
core   +2 more sources

BATSE observations of gamma-ray burst spectra. I: Spectral diversity

open access: yes, 1993
We studied the time-averaged gamma-ray burst spectra accumulated by the spectroscopy detectors of the Burst and Transient Source Experiment. The spectra are described well at low energy by a power-law continuum with an exponential cutoff and by a steeper
J. Matteson   +13 more
semanticscholar   +1 more source

Luminosity function and jet structure of Gamma-Ray Burst [PDF]

open access: yes, 2014
The structure of Gamma Ray Burst (GRB) jets impacts on their prompt and afterglow emission properties. The jet of GRBs could be uniform, with constant energy per unit solid angle within the jet aperture, or it could instead be structured, namely with ...
A. Pescalli   +7 more
semanticscholar   +1 more source

Gamma-ray Bursts and Afterglow [PDF]

open access: yesSymposium - International Astronomical Union, 2000
The origin of GRBs has been a mystery for almost 30 years. Their sources emit a huge amount of energy on short time scales, and the process involves extreme relativistic motion with a bulk Lorentz factor of at least a few hundred. In the last two years, “afterglow” emission in X-ray, optical, IR, and radio was detected. The afterglow can be measured up
openaire   +5 more sources

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