Results 31 to 40 of about 30,642 (222)

Generic Signatures of the Time Profiles of BATSE Cosmic Gamma‐Ray Bursts [PDF]

The Astrophysical Journal, 1998
A new method is proposed, which allows the study of generic signatures of cosmic gamma-ray burst time histories. We average the 64 ms resolution time profiles of 275 bright bursts detected by BATSE. The profile of each burst is normalized by the maximum number of counts at the peak of the primary pulse, and individual pulses and interpulse valleys are ...
Igor G. Mitrofanov, Alexei S. Pozanenko, Michael S. Briggs, William S. Paciesas, Robert D. Preece, Geoffrey N. Pendleton, Charles A. Meegan   +6 more
openaire   +1 more source

Searching for Short-Timescale Transients in Gamma-ray Telescope Data

Galaxies, 2023
Astrophysical sources show variability in their emissions over a range of timescales, with transients such as fast radio bursts (FRBs) and magnetar giant flares (MGFs) showing variability on timescales as short as a few milliseconds.
Annanay Jaitly, D. Kostunin, Karin Cescon   +2 more
semanticscholar   +1 more source

Perspectives on Gamma-Ray Burst Physics and Cosmology with Next Generation Facilities [PDF]

Space Science Reviews, 2016
High-redshift Gamma-Ray Bursts (GRBs) beyond redshift $\sim6$ are potentially powerful tools to probe the distant early Universe. Their detections in large numbers and at truly high redshifts call for the next generation of high-energy wide-field instruments with unprecedented sensitivity at least one order of magnitude higher than the ones currently ...
Yuan, Weimin, Amati, Lorenzo, Cannizzo, John K., Cordier, Bertrand, Gehrels, Neil, Ghirlanda, Giancarlo, Götz, Diego, Produit, Nicolas, Qiu, Yulei, Sun, Jianchao, Tanvir, Nial R., Wei, Jianyan, Zhang, Chen   +12 more
openaire   +4 more sources

GENERALIZED TESTS FOR SELECTION EFFECTS IN GAMMA-RAY BURST HIGH-ENERGY CORRELATIONS [PDF]

The Astrophysical Journal, 2009
Several correlations among parameters derived from modeling the high-energy properties of gamma-ray bursts (GRBs) have been reported. We show that well known examples of these have common features indicative of strong contamination by selection effects.
Nathaniel R. Butler, Daniel Kocevski, Joshua S. Bloom   +2 more
openaire   +1 more source

Gamma-Ray Bursts Generated by Hyper-Accreting Kerr Black Hole [PDF]

International Journal of Astronomy and Astrophysics, 2019
The observed properties of Gamma-Ray Bursts such as rapid variability of X-ray light curve and large energies strongly signature the compact binary, disk accreting system. Our work particularly highlights the extremely rotating, disk accreting black holes as physical source of the flares variability and X-ray afterglow plateaus of GRBs.
openaire   +1 more source

GAMMA-RAY BURST SPECTRA AND SPECTRAL CORRELATIONS FROM SUB-PHOTOSPHERIC COMPTONIZATION [PDF]

, 2015
One of the most important unresolved issues in gamma-ray burst (GRB) physics is the origin of the prompt gamma-ray spectrum. Its general non-thermal character and the softness in the X-ray band remain unexplained.
A. Chhotray, D. Lazzati
semanticscholar   +1 more source

HXMT identification of a non-thermal X-ray burst from SGR J1935+2154 and with FRB 200428

Nature Astronomy, 2020
Fast radio bursts (FRBs) are short pulses observed in the radio band from cosmological distances1. One class of models invokes soft gamma-ray repeaters (SGRs), or magnetars, as the sources of FRBs2.
C. K. Li, L. Lin, S. Xiong, M. Ge, X. Li, T. Li, F. Lu, S. Zhang, Y. Tuo, Y. Nang, B. Zhang, S. Xiao, Y. Chen, L. M. Song, Y. Xu, C. Liu, S. Jia, X. Cao, J. Qu, S. Zhang, Y. Gu, J. Liao, X. Zhao, Y. Tan, J. Nie, H. Zhao, S. Zheng, Y. Zheng, Q. Luo, C. Cai, B. Li, W. Xue, Q. Bu, Z. Chang, G. Chen, L. Chen, T. Chen, Y. Chen, Y. Chen, W. Cui, W. Cui, J. Deng, Y. Dong, Y. Du, M. Fu, G. Gao, H. Gao, M. Gao, Y. Gu, J. Guan, C. Guo, D. Han, Y. Huang, J. Huo, L. Jiang, W. Jiang, J. Jin, Y. Jin, L. Kong, G. Li, M. Li, W. Li, X. Li, X. Li, Y. Li, Z. Li, X. Liang, B. Liu, G. Liu, H. Liu, X. Liu, Y. Liu, B. Lu, X. Lu, T. Luo, X. Ma, B. Meng, G. Ou, N. Sai, R. Shang, X. Song, L. Sun, L. Tao, C. Wang, G. Wang, J. Wang, W. Wang, Y. Wang, X. Wen, B. Wu, B. Wu, M. Wu, G. Xiao, H. Xu, J. Yang, S. Yang, Y. J. Yang, Yi-Jung Yang, Q. Yi, Q. Yin, Y. You, A. Zhang, C. Zhang, F. Zhang, H. Zhang, J. Zhang, T. Zhang, W. Zhang, W. Zhang, W. Zhang, Yehui Zhang, Yue Zhang, Y. Zhang, Yehui Zhang, Z. Zhang, Zhi Zhang, Z. Zhang, D. Zhou, J. Zhou, Y. Zhu, Y. Zhu, R. Zhuang   +121 more
semanticscholar   +1 more source

SWIFT OBSERVATIONS OF GAMMA-RAY BURST PULSE SHAPES: GRB PULSE SPECTRAL EVOLUTION CLARIFIED [PDF]

, 2015
Isolated Swift gamma-ray burst (GRB) pulses, like their higher-energy BATSE counterparts, emit the bulk of their pulsed emission as a hard-to-soft component that can be fitted by the Norris et al. empirical pulse model.
J. Hakkila, A. Lien, T. Sakamoto, D. Morris, J. Neff, T. Giblin   +5 more
semanticscholar   +1 more source

A general scheme for modelling γ-ray burst prompt emission [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
We describe a general method for modeling gamma-ray burst prompt emission. We find that for the burst to be produced via the synchrotron process unphysical conditions are required -- the distance of the source from the center of the explosion ($R_ $) must be larger than $\sim 10^{17}$cm and the source Lorentz factor $\gta 10^3$; for such a high ...
Kumar, Pawan, McMahon, Erin, Austin, UT
openaire   +2 more sources

Nuclear criticality as a contributor to gamma ray burst events [PDF]

Astrophysics and Space Science, 2013
Most gamma ray bursts are able to be explained using supernovae related phenomenon. Some measured results still lack compelling explanations and a contributory cause from nuclear criticality is proposed.
R. Hayes
semanticscholar   +2 more sources