Courbin, F.Faure, C.Djorgovski, S. G.Rerat, F.Tewes, M.Meylan, G.Stern, D.Mahabal, A.Boroson, T.Dheeraj, R.Sluse, D.2012-05-252012-05-252012-05-25201210.1051/0004-6361/201118015https://infoscience.epfl.ch/handle/20.500.14299/80767WOS:000303315400050We report the discovery of three new cases of quasi-stellar objects (QSOs) acting as strong gravitational lenses on background emission line galaxies: SDSS J0827+5224 (z(QSO) = 0.293, z(s) = 0.412), SDSS J0919+2720 (z(QSO) = 0.209, z(s) = 0.558), SDSS J1005+4016 (z(QSO) = 0.230, z(s) = 0.441). The selection was carried out using a sample of 22,298 SDSS spectra displaying at least four emission lines at a redshift beyond that of the foreground QSO. The lensing nature is confirmed from Keck imaging and spectroscopy, as well as from HST/WFC3 imaging in the F475W and F814W filters. Two of the QSOs have face-on spiral host galaxies and the third is a QSO+galaxy pair. The velocity dispersion of the host galaxies, inferred from simple lens modeling, is between sigma = 210 and 285 km s(-1), making these host galaxies comparable in mass with the SLACS sample of early-type strong lenses.gravitational lensing: strongquasars: individual: SDSS J0013+1523quasars: individual: SDSS J0827+5224quasars: individual: SDSS J0919+2720quasars: individual: SDSS J1005+4016Early-Type GalaxiesGalactic NucleiSubstructureIi.DeconvolutionDecompositionCosmograilLuminosityModelsImagestext::journal::journal article::research article