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Three QSOs acting as strong gravitational lenses

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arxiv 1110.5514 v1 pith:EEJ3WVOJ submitted 2011-10-25 astro-ph.CO

F. Courbin (EPFL) , C. Faure (EPFL) , S. G. Djorgovski (Caltech) , F. Rerat (EPFL) , M. Tewes (EPFL) , G. Meylan (EPFL) , D. Stern (JPL) , A. Mahabal (Caltech)
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T. Boroson (NOAO) R. Dheeraj (Maryland) D. Sluse (ZAH AIfA)
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We report the discovery of three new cases of QSOs acting as strong gravitational lenses on background emission line galaxies: SDSS J0827+5224 (zQSO = 0.293, zs = 0.412), SDSS J0919+2720 (zQSO = 0.209, zs = 0.558), SDSS J1005+4016 (zQSO = 0.230, zs = 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_v = 210 and 285 km/s, making these host galaxies comparable in mass with the SLACS sample of early-type strong lenses.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 22 citations worldwide. Full citation record

  1. Confirming HSC strong lens candidates with DESI Spectroscopy. I. Project overview and first results

    astro-ph.GA 2025-05 conditional novelty 5.0 of 10

    Serendipitous DESI DR1 spectra confirm 27 HSC strong-lens systems and add 76 candidates with lensing galaxies at z>0.8.

  2. GIGA-Lens 2.0: Strong-Lens Modeling on Multiple GPU Nodes

    astro-ph.CO 2026-06 unverdicted novelty 4.0 of 10

    GIGA-Lens 2.0 scales strong gravitational lens modeling across up to 128 GPU nodes and demonstrates it on 100 simulated systems plus one real DESI lens.

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