%0 Generic %1 schechter2016first %A Schechter, Paul L. %A Morgan, Nicholas D. %A Chehade, B. %A Metcalfe, N. %A Shanks, T. %A McDonald, Michael %D 2016 %K atlas pairs quads survey vst %T First lensed quasar system(s) from the VST-ATLAS survey: one quad and three nearly identical pairs %U http://arxiv.org/abs/1607.07476 %X We have analyzed images from the VST ATLAS survey to identify candidate gravitationally lensed quasar systems in a sample of WISE sources with W1 - W2 > 0.7. Results from followup spectroscopy with the Baade 6.5 m telescope are presented for seven systems. One of these is a quadruply lensed quasar. Two are projected superpositions of two quasars at different redshifts. In one system two quasars, though at the same redshift, have very different emission line profiles, and constitute a physical binary. In three systems the component spectra are consistent with the lensing hypothesis, after allowing for micro-lensing. But as no lensing galaxy is detected in these three, we classify them as nearly identical quasar pairs. More extensive observations are needed to establish whether they are lensed quasars or physical binaries.

@misc{schechter2016first, abstract = {We have analyzed images from the VST ATLAS survey to identify candidate gravitationally lensed quasar systems in a sample of WISE sources with W1 - W2 > 0.7. Results from followup spectroscopy with the Baade 6.5 m telescope are presented for seven systems. One of these is a quadruply lensed quasar. Two are projected superpositions of two quasars at different redshifts. In one system two quasars, though at the same redshift, have very different emission line profiles, and constitute a physical binary. In three systems the component spectra are consistent with the lensing hypothesis, after allowing for micro-lensing. But as no lensing galaxy is detected in these three, we classify them as nearly identical quasar pairs. More extensive observations are needed to establish whether they are lensed quasars or physical binaries.}, added-at = {2016-07-27T10:07:45.000+0200}, author = {Schechter, Paul L. and Morgan, Nicholas D. and Chehade, B. and Metcalfe, N. and Shanks, T. and McDonald, Michael}, biburl = {https://www.bibsonomy.org/bibtex/2cc295ca9fc9f5fda4bd1cf902557b5f9/miki}, description = {[1607.07476] First lensed quasar system(s) from the VST-ATLAS survey: one quad and three nearly identical pairs}, interhash = {8f5f31e826136d5526c1066f8b2fa54a}, intrahash = {cc295ca9fc9f5fda4bd1cf902557b5f9}, keywords = {atlas pairs quads survey vst}, note = {cite arxiv:1607.07476Comment: Submitted to the Astronomical Journal}, timestamp = {2016-07-27T10:07:45.000+0200}, title = {First lensed quasar system(s) from the VST-ATLAS survey: one quad and three nearly identical pairs}, url = {http://arxiv.org/abs/1607.07476}, year = 2016 }