Results 51 to 60 of about 249,956 (357)

Ballerina - Pirouettes in Search of Gamma Bursts [PDF]

, 1999
The cosmological origin of gamma ray bursts has now been established with reasonable certainty. Many more bursts will need to be studied to establish the typical distance scale, and to map out the large diversity in properties which have been indicated ...
Brandt, S., Hjorth, J., Lund, N., Pedersen, H.   +3 more
core   +2 more sources

Bulk Lorentz factors of Gamma-Ray Bursts [PDF]

, 2017
Knowledge of the bulk Lorentz factor $\Gamma_{0}$ of GRBs allows us to compute their comoving frame properties shedding light on their physics. Upon collisions with the circumburst matter, the fireball of a GRB starts to decelerate, producing a peak or a
G. Ghirlanda, G. Ghirlanda, F. Nappo, G. Ghisellini, A. Melandri, G. Marcarini, L. Nava, O. Salafia, O. Salafia, S. Campana, R. Salvaterra   +10 more
semanticscholar   +1 more source

The design of a gamma‐ray burst polarimeter [PDF]

, 1993
The study of the polarization properties of the gamma‐ray bursts is the one remaining unexplored avenue of research which may help to answer some of the fundamental problems regarding the nature of these mysterious objects. We have designed an instrument
Forrest, D J, Levenson, K, McConnell, Mark L, Vestrand, W T   +3 more
core   +2 more sources

SHORT GAMMA-RAY BURSTS FROM THE MERGER OF TWO BLACK HOLES [PDF]

, 2016
Short gamma-ray bursts (GRBs) are explosions of cosmic origins believed to be associated with the merger of two compact objects, either two neutron stars or a neutron star and a black hole (BH).
R. Perna, D. Lazzati, B. Giacomazzo
semanticscholar   +1 more source

CLOAKED GAMMA-RAY BURSTS [PDF]

The Astrophysical Journal, 2014
accepted for publication in the Astrophysical ...
openaire   +2 more sources

Spectral Hardness and Evolution of Swift Gamma-Ray Bursts and X-Ray Afterglows

The Astrophysical Journal, 2023
Spectral hardness of gamma-ray bursts can be characterized by either hardness ratio or peak energy, and the inconsistency of these parameters can reflect spectral diversity and complexity.
X. Y. Du, H. Y. Zhen, J. X. Liu, Z. B. Zhang, X. F. Dong, Y. Ge, J. M. Yan   +6 more
doaj   +1 more source

On the nature of gamma-ray burst time dilations [PDF]

, 1994
The recent discovery that faint gamma-ray bursts are stretched in time relative to bright ones has been interpreted as support for cosmological distances: faint bursts have their durations redshifted relative to bright ones.
Paczyński, Bohdan, Wijers, Ralph A. M. J.   +1 more
core   +3 more sources

Short gamma-ray bursts at the dawn of the gravitational wave era [PDF]

, 2016
We derive the luminosity function and redshift distribution of short Gamma Ray Bursts (SGRBs) using (i) all the available observer-frame constraints (i.e.
G. Ghirlanda, O. Salafia, O. Salafia, A. Pescalli, G. Ghisellini, R. Salvaterra, E. Mottin, M. Colpi, M. Colpi, F. Nappo, P. D’Avanzo, A. Melandri, M. Bernardini, M. Branchesi, S. Campana, R. Ciolfi, S. Covino, D. Götz, S. D. Vergani, S. D. Vergani, Matteo Zennaro, Matteo Zennaro, G. Tagliaferri   +22 more
semanticscholar   +1 more source

Gamma-Ray Burst Energetics [PDF]

The Astrophysical Journal, 1999
We estimate the fraction of the total energy in a Gamma-Ray Burst (GRB) that is radiated in photons during the main burst. Random internal collisions among different shells limit the efficiency for converting bulk kinetic energy to photons. About 1% of the energy of explosion is converted to radiation, in 10-1000 kev energy band in the observer frame ...
openaire   +2 more sources

MERGERS OF CHARGED BLACK HOLES: GRAVITATIONAL-WAVE EVENTS, SHORT GAMMA-RAY BURSTS, AND FAST RADIO BURSTS [PDF]

, 2016
The discoveries of GW150914, GW151226, and LVT151012 suggest that double black hole (BH–BH) mergers are common in the universe. If at least one of the two merging black holes (BHs) carries a certain amount of charge, possibly retained by a rotating ...
Bing Zhang
semanticscholar   +1 more source