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SDSS J0806+2006 and SDSS J1353+1138: Two New Gravitationally Lensed Quasars from the Sloan Digital Sky Survey
Naohisa Inada, Masamune Oguri, Robert H. Becker +18
We report the discoveries of two, two-image gravitationally lensed quasars selected from the Sloan Digital Sky Survey: SDSS J0806+2006 at z_s=1.540 and SDSS J1353+1138 at z_s=1.629…
SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar
Bart Pindor, Daniel J. Eisenstein, Michael D. Gregg +24
We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is…
Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112
Gordon T. Richards, Charles R. Keeton, Bartosz Pindor +14
We present seven epochs of spectroscopy on the quadruply imaged quasar SDSS J1004+4112, spanning observed-frame time delays from 1 to 322 days. The spectra reveal differences in th…
Observations and Theoretical Implications of the Large Separation Lensed Quasar SDSS J1004+4112
M. Oguri, N. Inada, C. R. Keeton +25
We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62…
A class of compact dwarf galaxies from disruptive processes in galaxy clusters
M. J. Drinkwater, M. D. Gregg, M. Hilker +5
Dwarf galaxies have attracted increased attention in recent years, because of their susceptibility to galaxy transformation processes within rich galaxy clusters. Direct evidence f…
The Surface Brightness and Colour-Magnitude Relations for Fornax Cluster Galaxies
A. M. Karick, M. J. Drinkwater, M. D. Gregg
We present BVI photometry of 190 galaxies in the central region of the Fornax Cluster observed with the Michigan Curtis Schmidt Telescope. The cluster members exhibit a strong surf…