Results 11 to 20 of about 69,883 (320)
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 +10 more sources
CTQ 414: A New Gravitational Lens [PDF]
The Astronomical Journal, 1999 We report the discovery and ground based observations of the new gravitational lens CTQ 414. The source quasar lies at a redshift of z = 1.29 with a B magnitude of 17.6.
Alan Dressler +8 more
core +5 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.
Diego D. Harari +3 more
openaire +4 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 +5 more sources
Gravitational lens surveys with LOFAR [PDF]
Proceedings of From Planets to Dark Energy: the Modern Radio Universe — PoS(MRU), 2008 Poster presented at the conference "From planets to dark energy: The modern radio Universe" in Manchester, October 2007. Proceedings contribution and original poster also available from http://pos.sissa.it/cgi-bin/reader/contribution.cgi?id=PoS%28MRU ...
M. A. Garrett, Olaf Wucknitz
openaire +3 more sources
The strong gravitational lens finding challenge [PDF]
Astronomy & Astrophysics, 2019 Large-scale imaging surveys will increase the number of galaxy-scale strong lensing candidates by maybe three orders of magnitudes beyond the number known today. Finding these rare objects will require picking them out of at least tens of millions of images, and deriving scientific results from them will require quantifying the efficiency and bias of ...
Marc Huertas-Company +39 more
openaire +9 more sources
Global properties of gravitational lens maps in a Lorentzian manifold setting [PDF]
, 2000 In a general-relativistic spacetime (Lorentzian manifold), gravitational lensing can be characterized by a lens map, in analogy to the lens map of the quasi-Newtonian approximation formalism.
Perlick, Volker
core +3 more sources
Odessa Astronomical Publications, 2017 In this paper, we study the correlation between the number of solutions of a system of lens equations and the number of source images that a gravitational lens has. We defined the concept of an image in a gravitational lens.
A. T. Kotvytskiy +2 more
doaj +1 more source
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