2001/04/30 by Joshua N. Winn, Nicholas D. Morgan, N. D. Morgan +10 · 2 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lens #Lens (geology) #Optics #Physics #Quasar #Radio Astronomy Observations and Technology #Radio galaxy #Redshift #Sky #Telescope #Very Long Baseline Array #X-shaped radio galaxy #astro-ph
paper · pdf · doi:10.1086/338094
21 pp., including 4 figures; thoroughly revised in light of new MERLIN/HST data; accepted for publication in AJ
arxiv created 2001/10/10 · openalex publication_date 2002/01/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report the discovery of a gravitationally lensed quasar resulting from our survey for lenses in the southern sky. Radio images of J1632-0033 with the Very Large Array and the Australia Telescope Compact Array exhibit two compact, flat-spectrum components with separation 1 47 and flux density ratio 13.2. Images with the Hubble Space Telescope reveal the optical counterparts to the radio components and also the lens galaxy. An optical spectrum of the bright component obtained with the first Magellan telescope reveals quasar emission lines at redshift 3.42. Deeper radio images with the Multi-Element Radio Linked Interferometry Network and the Very Long Baseline Array reveal a faint third radio component located near the center of the lens galaxy, which is either a third image of the background quasar or faint emission from the lens galaxy.