Results 11 to 20 of about 71,531 (348)
The Gravitational Lens CFRS03.1077 [PDF]
The Astrophysical Journal, 2002 An exquisite gravitational arc with a radius of 2.1" has been discovered around the z = 0.938 field elliptical galaxy CFRS03.1077 during HST observations of Canada-France Redshift Survey (CFRS) fields.
A. Matzkin +9 more
core +8 more sources
Gravitational lens time delays and gravitational waves [PDF]
Physical Review D, 1994 Using Fermat's principle, we analyze the effects of very long wavelength gravitational waves upon the images of a gravitationally lensed quasar. We show that the lens equation in the presence of gravity waves is equivalent to that of a lens with different alignment between source, deflector, and observer in the absence of gravity waves.
Frieman, J., Harari, D., Surpi, G.
openaire +3 more sources
Semilinear Gravitational Lens Inversion [PDF]
The Astrophysical Journal, 2003 We describe a new method for analyzing gravitational lens images, for the case where the source light distribution is pixelized. The method is suitable for high resolution, high S/N data of a multiply-imaged extended source. For a given mass distribution, we show that the step of inverting the image to obtain the deconvolved pixelized source light ...
Warren, Steve, Dye, Simon
openaire +2 more sources
The final candidate from the JVAS/CLASS search for 6 arcsec to 15 arcsec image separation lensing [PDF]
, 2010 A search for 6 arcsec to 15 arcsec image separation lensing in the Jodrell Bank-Very Large Array Astrometric Survey (JVAS) and the Cosmic Lens All-Sky Survey (CLASS) by Phillips et al.
Barvainis +45 more
core +2 more sources
The 2dF Gravitational Lens Survey [PDF]
Publications of the Astronomical Society of Australia, 2001 AbstractThe 2 degree Field (2dF) galaxy redshift survey will involve obtaining spectra of approximately 2.5 105 objects which have previously been identified as galaxy candidates on morphological grounds. Included in these spectra should be about ten gravitationally-lensed quasars, all with low-redshift galaxies as deflectors (as the more common lenses
Mortlock, DJ, Madgwick, DS, Lahav, O
openaire +4 more sources
Motional Fock states for quantum-enhanced amplitude and phase measurements with trapped ions
Nature Communications, 2019 Quantum metrology allows surpassing the standard quantum limit, but methods relying on squeezing require to know the orientation of the squeezed quadrature with respect to the signal.
Fabian Wolf +8 more
doaj +1 more source
Fixed points of mapping of N-point gravitational lenses
Odessa Astronomical Publications, 2018 In this paper, we study fixed points of N-point gravitational lenses. We use complex form of lens mapping to study fixed points. Complex form has an advantage over coordinate one because we can describe N-point gravitational lens by system of two equation ...
A. T. Kotvytskiy +2 more
doaj +1 more source
Studies of relativistic effects with radioastron space mission [PDF]
Serbian Astronomical Journal, 2007 In the review we discuss possible studies of GR phenomena such as gravitational microlensing and shadow analysis with the forthcoming RadioAstron space mission.
Zakharov A.F.
doaj +1 more source
Degeneracy in exotic gravitational lensing [PDF]
, 2002 We present three different theoretically foreseen, but unusual, astrophysical situations where the gravitational lens equation ends up being the same, thus producing a degeneracy problem.
Cooray A. +9 more
core +2 more sources
Self-consistent gravitational lens reconstruction [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 We present a new method for directly determining accurate, self-consistent cluster lens mass and shear maps in the strong lensing regime from the magnification bias of background galaxies. The method relies upon pixellisation of the surface mass density distribution which allows us to write down a simple, solvable set of equations.
Dye, S., Taylor, A.
openaire +2 more sources