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WFI J2026-4536 and WFI J2033-4723: Two New Quadruple Gravitational Lenses
Nicholas D. Morgan, John A. R. Caldwell, Paul L. Schechter +3
We report the discovery of two new gravitationally lensed quasars, WFI J2026-4536 and WFI J2033-4723, at respective source redshifts of z=2.23 and z=1.66. Both systems are quadrupl…
SDSS J1335+0118: A New Two-Image Gravitational Lens
Masamune Oguri, Naohisa Inada, Francisco J. Castander +13
We report the discovery of the two-image gravitationally lensed quasar SDSS J1335+0118. The object was selected as a lens candidate from the Sloan Digital Sky Survey. The imaging a…
The Optical Gravitational Lensing Experiment. Optical Monitoring of the Gravitationally Lensed Quasar HE1104-1805 in 1997-2002
L. Wyrzykowski, A. Udalski, P. L. Schechter +6
We present results of the long term monitoring of the gravitationally lensed quasar HE1104-1805. The photometric data were collected between August 1997 and January 2002 as a subpr…
The dark matter content of lensing galaxies at 1.5 R_e
Paul L. Schechter, Joachim Wambsganss
Many gravitationally lensed quasars exhibit flux ratio "anomalies" that cannot be explained under the hypothesis that the lensing potential is smooth on scales smaller than one kpc…
Mass and dust in the disk of a spiral lens galaxy
Joshua N. Winn, Patrick B. Hall, Paul L. Schechter
Gravitational lensing is a potentially important probe of spiral galaxy structure, but only a few cases of lensing by spiral galaxies are known. We present Hubble Space Telescope a…
Flux Ratio Anomalies: Micro- and Milli-lensing
Paul L. Schechter
Simple models for lensing potentials that successfully reproduce the positions of quadruple images to high accuracy fail abysmally in reproducing the flux ratios of the multiple im…