Results 1 to 10 of about 50 (49)
THE OPTIMAL GRAVITATIONAL LENS TELESCOPE [PDF]
The Astronomical Journal, 2010 Given an observed gravitational lens mirage produced by a foreground deflector (cf. galaxy, quasar, cluster,...), it is possible via numerical lens inversion to retrieve the real source image, taking full advantage of the magnifying power of the cosmic lens. This has been achieved in the past for several remarkable gravitational lens systems.
Dimitri Mawet +11 more
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The Gravitational Lens CFRS 03.1077 [PDF]
The Astrophysical Journal, 2002 11 pages, 5 figures, accepted by Ap ...
O. Le Fevre +8 more
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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
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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
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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
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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
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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 ...
Simon Dye, Steve Warren
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GRAVITATIONAL LENS CANDIDATES IN THE E-CDFS [PDF]
The Astrophysical Journal, 2011 We report ten lens candidates in the E-CDFS from the GEMS survey. Nine of the systems are new detections and only one of the candidates is a known lens system. For the most promising five systems including the known lens system, we present results from preliminary lens mass modelling, which tests if the candidates are plausible lens systems ...
Surhud More +7 more
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Discovery of a Probable Gravitational Lens [PDF]
Symposium - International Astronomical Union, 1989 We report the discovery of a new probable gravitational lens system, associated with the quasar UM 425 = 1120+019, at z = 1.465. The optical image of the system consists of 4 or more components. The two well-observed brightest components have very similar spectra. The difference of the two spectra (scaled appropriately) is consistent with a spectrum of
Meylan, G., Djorgovski, S.
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A VLA Gravitational Lens Survey [PDF]
Symposium - International Astronomical Union, 1987 Gravitational lens surveys are of cosmological interest because they provide a way to measure the gravitational field of both luminous and dark matter. Many of the other methods used to detect the presence of dark matter, such as studies of galaxy rotation curves and cluster dynamics, require that there be luminous objects in the gravitational field ...
James E. Gunn +6 more
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