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We predict the redshift distribution of Gamma-Ray Bursts (GRBs) assuming that they trace the cosmic star formation history. We find that a fraction >~50% of all GRBs on the sky originate at a redshift z >~5, even though the fraction of the…

天体物理学 · 物理学 2011-07-19 Volker Bromm , Abraham Loeb

The spatial distribution of sources of gamma-ray bursts (GRB) with known red shifts is analyzed by the conditional density and pairwise distance methods. The sample of GRB is based on data from the Swift mission and contains fluxes,…

宇宙学与河外天体物理 · 物理学 2018-02-06 S. I. Shirokov , A. A. Raikov , Yu. V. Baryshev

The clusters of gamma-ray bursts are considered which are assumed to be images of the repeated gamma-ray burst (GRB) sources. It is shown, that localization of the cosmic gamma-ray burst sources (GBS) is determined by the clusters of GRBs.…

天体物理学 · 物理学 2007-05-23 A. V. Kuznetsov

Discoveries of gamma-ray bursts (GRBs) have become commonplace in recent decades, totalling $\mathcal{O}(10^4)$ unique detections across various missions. However, there have been no confirmed discoveries of a gravitationally-lensed GRB,…

高能天体物理现象 · 物理学 2026-04-09 Dan Ryczanowski , Benjamin P. Jones , Benjamin P. Gompertz , Graham P. Smith

In this paper, we calibrate the Amati relation (the $E_{\rm p}$-${E}_{\rm iso}$ correlation) of gamma-ray bursts (GRBs) in a cosmology-independent way. By using Gaussian process to reconstruct the smoothed luminosity distance from the…

宇宙学与河外天体物理 · 物理学 2022-12-16 Nan Liang , Zihao Li , Xiaoyao Xie , Puxun Wu

We propose a new method for the classification of optically dark gamma-ray bursts (GRBs), based on the X-ray and optical-to-X-ray spectral indices of GRB afterglows, and utilizing the spectral capabilities of Swift. This method depends less…

高能天体物理现象 · 物理学 2010-03-19 A. J. van der Horst , C. Kouveliotou , N. Gehrels , E. Rol , R. A. M. J. Wijers , J. K. Cannizzo , J. Racusin , D. N. Burrows

If a small fraction of Fast Radio Bursts (FRBs) are associated with Gamma-Ray Bursts (GRBs), as recently suggested by Zhang, the combination of redshift measurements of GRBs and dispersion measure (DM) measurements of FRBs opens a new…

高能天体物理现象 · 物理学 2014-03-05 Wei Deng , Bing Zhang

We present a comprehensive study to measure the locations of gamma-ray bursts (GRBs) relative to their host galaxies. In total, we find the offsets of 20 long-duration GRBs from their apparent host galaxy centers utilizing ground-based…

天体物理学 · 物理学 2009-10-31 J. S. Bloom , S. R. Kulkarni , S. G. Djorgovski

A class of long gamma-ray bursts (GRBs) with a plateau phase in their X-ray afterglows obeys a three-dimensional (3D) relation (Dainotti et al. 2016), between the rest-frame time at the end of the plateau, Ta, its corresponding X-ray…

高能天体物理现象 · 物理学 2016-11-01 Maria Dainotti , Christian Gilbertson , Sergey Postnikov , Shigehiro Nagataki , Richard Willingale

The gravitational lensing effect of gamma-ray bursts (GRBs) holds significant and diverse applications in the field of astronomy. Nevertheless, the identification of millilensing events in GRBs presents substantial challenges. We…

高能天体物理现象 · 物理学 2025-09-01 Yu Zhao , Zhao-Yang Peng , Jia-Ming Chen , Yue Yin , Ting Li

We test the gamma-ray burst correlation between temporal variability and peak luminosity of the $\gamma$-ray profile on a homogeneous sample of 36 Swift/BAT GRBs with firm redshift determination. This is the first time that this correlation…

Recent rapid localizations of short, hard gamma-ray bursts (GRBs) by the Swift and HETE satellites have led to the observation of the first afterglows and the measurement of the first redshifts from this type of burst. Detection of >100 GeV…

Gamma Ray Bursts (GRBs) are a powerful probe of the high redshift Universe. We present a tool to estimate the detection rate of high-z GRBs by a generic detector with defined energy band and sensitivity. We base this on a population model…

This paper concerns the K band Hubble diagram for the brightest cluster galaxies (BCGs) in a sample of X-ray clusters covering the redshift range $0.05<z<0.8$. We show that BCGs in clusters of high X-ray luminosity are excellent standard…

天体物理学 · 物理学 2009-10-30 Chris Collins , Bob Mann

Rapid identification of candidates of high-value gamma-ray bursts (GRBs), including both high-$z$ and local events, is crucial for outlining subsequent observational strategy. In this paper, we present a model that enables an on-duty…

高能天体物理现象 · 物理学 2025-03-11 J. Wang , Y. Xu , L. J. Chen , C. Wu , L. P. Xin , E. W. Liang , J. Y. Wei

Long Gamma-Ray Bursts (LGRBs) have been shown to be powerful probes of the Universe, in particular to study the star formation rate up to very high redshift ($z \sim 9$). Since LGRBs are produced by only a small fraction of massive stars,…

高能天体物理现象 · 物理学 2021-06-02 Jesse T. Palmerio , Frédéric Daigne

We combine recent long Gamma Ray Bursts (GRBs) sample including 52 objects out to z$=$6.3 compiled from Swift Gamma Ray Bursts by Schaefer (2006) with Type Ia Supernova (SNIa), Cosmic Microwave Background (CMB) and Baryon Oscillation (BAO)…

天体物理学 · 物理学 2007-05-23 Meng Su , Hong Li , Zuhui Fan , Bo Liu

Gamma-ray bursts (GRBs), observed to redshift $z=9.4$, are potential probes of the largely unexplored $z\sim 2.7-9.4$ part of the early Universe. Thus, finding relevant relations among GRB physical properties is crucial. We find that the…

宇宙学与河外天体物理 · 物理学 2022-09-09 Shulei Cao , Maria Dainotti , Bharat Ratra

Gamma-ray bursts (GRBs), which have been observed up to redshifts z approx 9.5 can be good probes of the early universe and have the potential of testing cosmological models. The analysis by Dainotti of GRB Swift afterglow lightcurves with…

高能天体物理现象 · 物理学 2015-06-16 Maria Giovanna Dainotti , Vahe' Petrosian , Jack Singal , Michal Ostrowski

In this paper, we examine the spacial distribution of gamma-ray bursts (GRBs) using a sample of 373 objects. We subdivide the GRB data into two redshift intervals over the redshift range $0<z< 6.7$. We measure the two-point correlation…

宇宙学与河外天体物理 · 物理学 2015-07-07 Ming-Hua Li , Hai-Nan Lin
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