Results 21 to 30 of about 3,180 (242)

The First JWST Spectrum of a GRB Afterglow: No Bright Supernova in Observations of the Brightest GRB of all Time, GRB 221009A

The Astrophysical Journal Letters, 2023
We present James Webb Space Telescope (JWST) and Hubble Space Telescope (HST) observations of the afterglow of GRB 221009A, the brightest gamma-ray burst (GRB) ever observed.
A. J. Levan, G. P. Lamb, B. Schneider, J. Hjorth, T. Zafar, A. de Ugarte Postigo, B. Sargent, S. E. Mullally, L. Izzo, P. D’Avanzo, E. Burns, J. F. Agüí Fernández, T. Barclay, M. G. Bernardini, K. Bhirombhakdi, M. Bremer, R. Brivio, S. Campana, A. A. Chrimes, V. D’Elia, M. Della Valle, M. De Pasquale, M. Ferro, W. Fong, A. S. Fruchter, J. P. U. Fynbo, N. Gaspari, B. P. Gompertz, D. H. Hartmann, C. L. Hedges, K. E. Heintz, K. Hotokezaka, P. Jakobsson, D. A. Kann, J. A. Kennea, T. Laskar, E. Le Floc’h, D. B. Malesani, A. Melandri, B. D. Metzger, S. R. Oates, E. Pian, S. Piranomonte, G. Pugliese, J. L. Racusin, J. C. Rastinejad, M. E. Ravasio, A. Rossi, A. Saccardi, R. Salvaterra, B. Sbarufatti, R. L. C. Starling, N. R. Tanvir, C. C. Thöne, A. J. van der Horst, S. D. Vergani, D. Watson, K. Wiersema, R. A. M. J. Wijers, Dong Xu   +59 more
doaj   +1 more source

GAMMA-RAY BURSTS [PDF]

Particles, Strings and Cosmology (PASCOS 99), 2000
Ultra-high-energy, >10^19 eV, cosmic-ray and high energy, ~10^14 eV, neutrino production in GRBs is discussed in the light of recent GRB and cosmic-ray observations. Emphasis is put on model predictions that can be tested with operating and planned cosmic-ray and neutrino detectors, and on the prospects of testing for neutrino properties.
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Very-high-energy Gamma-Ray Afterglows of GRB 201015A and GRB 201216C

The Astrophysical Journal, 2023
Gamma-ray bursts (GRBs) 201015A and 201216C are valuable cases where very-high-energy (VHE) gamma-ray afterglows have been detected. By analyzing their prompt emission data, we find that GRB 201216C is an extremely energetic, long GRB with a hard gamma ...
Lu-Lu Zhang, Jia Ren, Yun Wang, En-Wei Liang   +3 more
doaj   +1 more source

Dark gamma-ray bursts [PDF]

Physical Review D, 2017
Many theories of dark matter (DM) predict that DM particles can be captured by stars via scattering on ordinary matter. They subsequently condense into a DM core close to the center of the star and eventually annihilate. In this work, we trace DM capture and annihilation rates throughout the life of a massive star and show that this evolution ...
Brdar, Vedran, Kopp, Joachim, Liu, Jia
openaire   +2 more sources

A Broken “α–intensity” Relation Caused by the Evolving Photosphere Emission and the Nature of the Extraordinarily Bright GRB 230307A

The Astrophysical Journal Letters, 2023
GRB 230307A is one of the brightest gamma-ray bursts detected so far. With the excellent observation of GRB 230307A by the Fermi Gamma-ray Burst Monitor, we can reveal the details of prompt emission evolution.
Yun Wang, Zi-Qing Xia, Tian-Ci Zheng, Jia Ren, Yi-Zhong Fan   +4 more
doaj   +1 more source

A theory of gamma-ray bursts

New Astronomy, 2000
32 pages, 8 figures, accepted for publication in New ...
Brown, G.E., Lee, C.-H., Wijers, R.A.M.J., Lee, H.K., Israelian, G., Bethe, H.A.   +5 more
openaire   +3 more sources

GRB 221009A: Discovery of an Exceptionally Rare Nearby and Energetic Gamma-Ray Burst

The Astrophysical Journal Letters, 2023
We report the discovery of the unusually bright long-duration gamma-ray burst (GRB), GRB 221009A, as observed by the Neil Gehrels Swift Observatory (Swift), Monitor of All-sky X-ray Image, and Neutron Star Interior Composition Explorer Mission.
Maia A. Williams, Jamie A. Kennea, S. Dichiara, Kohei Kobayashi, Wataru B. Iwakiri, Andrew P. Beardmore, P. A. Evans, Sebastian Heinz, Amy Lien, S. R. Oates, Hitoshi Negoro, S. Bradley Cenko, Douglas J. K. Buisson, Dieter H. Hartmann, Gaurava K. Jaisawal, N. P. M. Kuin, Stephen Lesage, Kim L. Page, Tyler Parsotan, Dheeraj R. Pasham, B. Sbarufatti, Michael H. Siegel, Satoshi Sugita, George Younes, Elena Ambrosi, Zaven Arzoumanian, M. G. Bernardini, S. Campana, Milvia Capalbi, Regina Caputo, Antonino D’Aì, P. D’Avanzo, V. D’Elia, Massimiliano De Pasquale, R. A. J. Eyles-Ferris, Elizabeth Ferrara, Keith C. Gendreau, Jeffrey D. Gropp, Nobuyuki Kawai, Noel Klingler, Sibasish Laha, A. Melandri, Tatehiro Mihara, Michael Moss, Paul O’Brien, Julian P. Osborne, David M. Palmer, Matteo Perri, Motoko Serino, E. Sonbas, Michael Stamatikos, Rhaana Starling, G. Tagliaferri, Aaron Tohuvavohu, Silvia Zane, Houri Ziaeepour   +55 more
doaj   +1 more source

Model Constraints Based on the IceCube Neutrino Nondetection of GRB 221009A

The Astrophysical Journal, 2023
GRB 221009A is a bright gamma-ray burst (GRB) with isotropic energy larger than 10 ^54 erg. Its fairly low redshift makes it a promising candidate for high-energy neutrino detection.
Shunke Ai, He Gao
doaj   +1 more source

Repeating Emission Episodes in Gamma-Ray Bursts: Millilensing or Jet Precession?

The Astrophysical Journal, 2023
Recently, some gamma-ray bursts (GRBs) whose light curves consist of repeating emission episodes with similar temporal profiles have attracted extensive attention.
He Gao, An Li, Wei-Hua Lei, Zhi-Qiang You   +3 more
doaj   +1 more source

The physics of gamma-ray bursts [PDF]

Reviews of Modern Physics, 2005
159 pages, 33 figures, accepted for publication in Reviews of Modern ...
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