scholarly journals The Effect of Weak Gravitational Lensing on the Angular Distribution of Gamma‐Ray Bursts

1996 ◽  
Vol 472 (2) ◽  
pp. 497-501 ◽  
Author(s):  
L. L. R. Williams
Keyword(s):  
Angular Distribution ◽  
Gravitational Lensing ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Weak Gravitational Lensing

scholarly journals GRAVITATIONAL LENSING BOUND ON THE AVERAGE REDSHIFT OF GAMMA RAY BURSTS IN MODELS WITH EVOLVING LENSES

1999 ◽  
Vol 08 (04) ◽  
pp. 507-517 ◽  
Author(s):  
DEEPAK JAIN ◽  
N. PANCHAPAKESAN ◽  
S. MAHAJAN ◽  
V. B. BHATIA
Keyword(s):  
Gravitational Lensing ◽  
Gamma Ray ◽  
Cosmological Parameters ◽  
Evolutionary Model ◽  
Gamma Ray Bursts ◽  
The Other ◽  
Upper Limit ◽  
Evolving Model ◽  
Evolving Models ◽  
The Universe

Identification of gravitationally lensed Gamma Ray Bursts (GRBs) in the BATSE 4B catalog can be used to constrain the average redshift <z> of the GRBs. In this paper we investigate the effect of evolving lenses on the <z> of GRBs in different cosmological models of the universe. The cosmological parameters Ω and Λ have an effect on the <z> of GRBs. The other factor which can change the <z> is the evolution of galaxies. We consider three evolutionary model of galaxies. In particular, we find that the upper limit on <z> of GRBs is higher in evolving model of galaxies as compared to non-evolving models of galaxies.

scholarly journals Spatial Distribution of the Gamma-ray Bursts and the Cosmological Principle

2016 ◽  
Vol 12 (S324) ◽  
pp. 89-90
Author(s):  
Attila Mészáros
Keyword(s):  
Spatial Distribution ◽  
Angular Distribution ◽  
Large Scale ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Cosmological Principle ◽  
The Universe

AbstractThe Cosmological Principle claims that in the large scale average the visible parts of the universe are isotropic and homogeneous. In year 1998 the author, together with his two colleagues, discovered that the BATSE’s short gamma-ray bursts are not distributed isotropically on the sky. This first discovery was followed by other ones confirming both the existence of anisotropies in the angular distribution of bursts and the existence of huge Gpc structures in the spatial distribution. All this means that these anisotropies should reject the Cosmological Principle, because the large scale averaging hardly can be provided. This was claimed in year 2009. The aim of this contribution is to survey these publications since 1998 till today.

scholarly journals An intrinsic anisotropy in the angular distribution of gamma-ray bursts

1999 ◽  
Vol 138 (3) ◽  
pp. 417-418 ◽  
Author(s):  
L. G. Balázs ◽  
A. Mészáros ◽  
I. Horváth ◽  
R. Vavrek
Keyword(s):  
Angular Distribution ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Intrinsic Anisotropy

scholarly journals A Remarkable Angular Distribution of the Intermediate Subclass of Gamma‐Ray Bursts

2000 ◽  
Vol 539 (1) ◽  
pp. 98-101 ◽  
Author(s):  
Attila Meszaros ◽  
Zsolt Bagoly ◽  
Istvan Horvath ◽  
Lajos G. Balazs ◽  
Roland Vavrek
Keyword(s):  
Angular Distribution ◽  
Gamma Ray ◽  
Gamma Ray Bursts

Searching gamma-ray bursts for gravitational lensing echoes - Implications for compact dark matter

1993 ◽  
Vol 414 ◽  
pp. 36 ◽  
Author(s):  
R. J. Nemiroff ◽  
J. P. Norris ◽  
W. A. D. T. Wickramasinghe ◽  
J. M. Horack ◽  
C. Kouveliotou ◽  
...  
Keyword(s):  
Dark Matter ◽  
Gravitational Lensing ◽  
Gamma Ray ◽  
Gamma Ray Bursts
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