We report the discovery of five gravitationally lensed quasars from the Sloan Digital Sky Survey (SDSS). All five systems are selected as two-image lensed quasar candidates from a sample of high-redshift (z> 2.2) SDSS quasars. We confirmed their lensing nature with additional imaging and spectroscopic observations. The new systems are SDSS J0819+5356 (source redshift zs = 2.237, lens redshift zl = 0.294, and image separation θ = 4. ′ ′ 04), SDSS J1254+2235 (zs =
No takes yet. Share an insight, caveat, or question.
Inada et al. (2009) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: