Shear and Ellipticity in Gravitational Lenses [PDF]
The Astrophysical Journal, 1996 Galaxies modeled as singular isothermal ellipsoids with an axis ratio distribution similar to the observed axis ratio distribution of E and S0 galaxies are statistically consistent with both the observed numbers of two-image and four-image lenses and the
Binney J. J. +26 more
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KiDS-1000 catalogue: Weak gravitational lensing shear measurements [PDF]
Astronomy & Astrophysics, 2021 We present weak lensing shear catalogues from the fourth data release of the Kilo-Degree Survey, KiDS-1000, spanning 1006 square degrees of deep and high-resolution imaging. Our ‘gold-sample’ of galaxies, with well-calibrated photometric redshift distributions, consists of 21 million galaxies with an effective number density of 6.17 galaxies per square
Giblin, B. +22 more
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Topological defects in gravitational lensing shear fields [PDF]
Journal of Cosmology and Astroparticle Physics, 2009 17 pages, 4 ...
Vitelli, Vincenzo +2 more
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MULTIPOLE FORMULAE FOR GRAVITATIONAL LENSING SHEAR AND FLEXION [PDF]
The Astrophysical Journal, 2009 ABSTRACT The gravitational lensing equations for convergence, potential, shear, and flexion are simple in polar coordinates and separate under a multipole expansion once the shear and flexion spinors are rotated into a “tangential” basis.
Bernstein, Gary M., Nakajima, Reiko
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Gravitational Shear, Flexion, and Strong Lensing in Abell 1689 [PDF]
The Astrophysical Journal, 2007 We present a gravitational lensing analysis of the galaxy cluster Abell 1689, incorporating measurements of the weak shear, flexion, and strong lensing induced in background galaxies. This is the first time that a shapelet technique has been used to reconstruct the distribution of mass in this cluster, and the first time that a flexion signal has been ...
Leonard, Adrienne +3 more
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THE EFFECT OF ENVIRONMENT ON SHEAR IN STRONG GRAVITATIONAL LENSES [PDF]
The Astrophysical Journal, 2010 Accepted for publication in The Astrophysical Journal; 28 pages, 9 figures, 5 ...
Wong, Kenneth C. +4 more
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Statistics of Extreme Gravitational Lensing Events. I. The Zero Shear Case [PDF]
The Astrophysical Journal, 1996 For a given source and lens pair, there is a thin on-axis tube-like volume behind the lens in which the radiation flux from the source is greatly increased due to gravitational lensing. Any objects (such as dust grains) which pass through such a thin tube will experience strong bursts of radiation, i.e., Extreme Gravitational Lensing Events (EGLE).
Wang, Yun, Turner, Edwin L.
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Statistics of Extreme Gravitational Lensing Events. II. The Finite Shear Case [PDF]
The Astrophysical Journal, 1997 17 pages including 3 figures, using AAS LATEX macros v4.0.
Wang, Yun, Turner, Edwin L.
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Means of confusion: how pixel noise affects shear estimates for weak gravitational lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 integrated the origin of the moment correlation (thanks to Alan Heavens).
Melchior, P., Viola, M.
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Weak gravitational lensing in different cosmologies, using an algorithm for shear in three dimensions [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We present the results of weak gravitational lensing statistics in four different cosmological $N$-body simulations. The data has been generated using an algorithm for the three-dimensional shear, which makes use of a variable softening facility for the $N$-body particle masses, and enables a physical interpretation for the large-scale structure to be ...
Andrew J. Barber +3 more
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