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The detection of six Fast Radio Bursts (FRBs) has recently been reported. FRBs are short duration ($\sim$ 1 ms), highly dispersed radio pulses from astronomical sources. The physical interpretation for the FRBs remains unclear but is…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Divya Palaniswamy , Randall B. Wayth , Cathryn M. Trott , Jamie N. McCallum , Steven J. Tingay , Cormac Reynolds

Swift-XRT observations of the X-ray emission from gamma ray bursts (GRBs) and during the GRB afterglow have led to many new results during the past two years. One of these exciting results is that approximately 1/3-1/2 of GRBs contain…

Gamma ray burst (GRB) time series is a non-stationary time series with all its statistical properties varying with time. Considering that each GRB is a different manifestation of the same stochastic process we studied the time dependent as…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Nilay Bhatt , Subir Bhattacharyya

We report the first detections of the repeating fast radio burst source FRB 121102 above 5.2 GHz. Observations were performed using the 4$-$8 GHz receiver of the Robert C. Byrd Green Bank Telescope with the Breakthrough Listen digital…

A few tight correlations linking several properties of gamma-ray bursts (GRBs), namely the spectral peak energy, the total radiated energy, and the afterglow break time, have been discovered with pre-Swift GRBs. They were used to constrain…

Astrophysics · Physics 2009-11-13 S. Campana , C. Guidorzi , G. Tagliaferri , G. Chincarini , A. Moretti , D. Rizzuto , P. Romano

The detection of a fast radio burst (FRB), FRB 200428, coincident with an X-ray burst (XRB) from the Galactic magnetar soft gamma repeater (SGR) SGR J1935+2154 suggests that magnetars can produce FRBs. Many XRBs have been detected from the…

High Energy Astrophysical Phenomena · Physics 2022-12-23 Connery J. Chen , Bing Zhang

Some repeating fast radio burst (FRB) sources show high burst rates, and the physical origin is still unknown. Outstandingly, the first repeater FRB 121102 appears extremely high burst rate with the maximum value reaching…

High Energy Astrophysical Phenomena · Physics 2022-09-21 Qiao-Chu Li , Yuan-Pei Yang , F. Y. Wang , Kun Xu , Zi-Gao Dai

We investigate quantum persistence by analyzing amplitude and phase fluctuations of the wave function governed by the time-dependent free-particle Schr\"odinger equation. The quantum system is initialized with local random uncorrelated…

Statistical Mechanics · Physics 2025-05-09 Cheng Ma , Omar Malik , G. Korniss

Fast radio bursts (FRBs) are millisecond-duration extragalactic radio transients. They apparently fall into repeaters and non-repeaters. However, such a classification has lacked a motivation on the physical picture. Here we propose a…

High Energy Astrophysical Phenomena · Physics 2024-04-26 Ze-Nan Liu , Zhao-Yang Xia , Shu-Qing Zhong , Fa-Yin Wang , Zi-Gao Dai

We present a comparative study of the observed properties of the optical and X-ray afterglows of short- and long-duration gamma-ray bursts (GRBs). Using a large sample of 37 short and 421 long GRBs, we find a strong correlation between the…

Astrophysics · Physics 2009-08-05 M. Nysewander , A. S. Fruchter , A. Pe'er

Power density spectra (PDSs) of long gamma-ray bursts provide useful information on GRBs, indicating their self-similar temporal structure. The best power-law PDSs are displayed by the longest bursts (T_90 > 100 s) in which the range of…

Astrophysics · Physics 2007-05-23 Andrei M. Beloborodov

Fast radio bursts (FRBs) are milliseconds radio transients with large dispersion measures (DMs). An outstanding question is the relation between repeating FRBs and those with a single burst. In this paper, we study the energy distribution…

High Energy Astrophysical Phenomena · Physics 2019-09-25 F. Y. Wang , G. Q. Zhang

Fast radio bursts (FRBs) are bright, energetic, radio pulses of extragalactic origin. A dichotomy has emerged in the population: some produce repeat bursts, while the majority do not. Most repeating sources only show rare repetitions, and…

Nearly 700 fast radio burst (FRB) sources have been detected till now, among which 29 FRBs are found to burst out repeatedly. Although a firm connection between at least some FRBs and magnetars has been established, the trigger mechanism…

High Energy Astrophysical Phenomena · Physics 2023-10-31 Chen-Ran Hu , Yong-Feng Huang

Gamma-ray bursts (GRBs) are divided into short gamma-ray bursts (SGRBs) and long gamma-ray bursts (LGRBs) based on the bimodal distribution of their durations. LGRBs and SGRBs are typically characterized by different statistical…

High Energy Astrophysical Phenomena · Physics 2022-09-01 Yun Wang , Lu-Yao Jiang , Jia Ren

We present timing and time-integrated spectral analysis of 127 bursts from SGR J1935+2154. These bursts were observed with the Gamma-ray Burst Monitor on the Fermi Gamma-ray Space Telescope and the Burst Alert Telescope on the Neil Gehrels…

High Energy Astrophysical Phenomena · Physics 2020-07-14 Lin Lin , Ersin Gogus , Oliver J. Roberts , Chryssa Kouveliotou , Yuki Kaneko , Alexander J. van der Horst , George Younes

The Ginga data for the gamma-ray burst GRB870303 exhibit low-energy dips in two temporally distinct spectra, denoted S1 and S2. S1, spanning 4 s, exhibits a single line candidate at ~ 20 keV, while S2, spanning 9 s, exhibits apparently…

Astrophysics · Physics 2009-10-31 P. E. Freeman , C. Graziani , D. Q. Lamb , T. J. Loredo , E. E. Fenimore , T. Murakami , A. Yoshida

Aims: In this paper we study the main spectral and temporal properties of gamma-ray bursts (GRBs) observed by Fermi/GBM. We investigate these key properties of GRBs in the rest-frame of the progenitor and test for possible intra-parameter…

Fast radio bursts (FRBs) last for $\sim $ few milli-seconds and, hence, are likely to arise from the gravitational collapse of supra-massive, spinning neutron stars after they lose the centrifugal support (Falcke \& Rezzolla 2014). In this…

High Energy Astrophysical Phenomena · Physics 2019-05-22 Patrick Das Gupta , Nidhi Saini

We present results from Swift, XMM-Newton, and deep INTEGRAL monitoring in the region of GRB 050925. This short Swift burst is a candidate for a newly discovered soft gamma-ray repeater (SGR) with the following observational burst…