SDSS J0909+4449: A large-separation strongly lensed quasar at z ˜ 2.8 with three images
We report the discovery of SDSS J0909+4449, an exceptional system consisting of a quasar at z = 2.788 strongly lensed by a group of galaxies at z ˜ 0.9 into three images separated by up to 14 arcsec based on archival data collected by the Sloan Digital Sky Survey, extended Baryon Oscillation Spectroscopic Survey, Beijing-Arizona Sky Survey, the
Shu, Y. et al.
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2018