Journal article

SDSS J090334.92 502819.2: A new gravitational lens

DE Johnston, GT Richards, JA Frieman, CR Keeton, MA Strauss, GR Knapp, RH Becker, RL White, ET Johnson, ZM Ma, M SubbaRao, NA Bahcall, M Bernardi, J Brinkmann, DJ Eisenstein, M Fukugita, PB Hall, N Inada, B Pindor, DJ Schlegel Show all

ASTRONOMICAL JOURNAL | UNIV CHICAGO PRESS | Published : 2003

Abstract

We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J090334.92+502819.2. This object was targeted for SDSS spectroscopy as a luminous red galaxy, but manual examination of the spectrum showed the presence of a quasar at z ≃ 3.6 in addition to a red galaxy at z = 0.388, and the SDSS image showed a second possible quasar image nearby. Follow-up imaging and spectroscopy confirmed the lensing hypothesis. In images taken at the Astrophysical Research Consortium 3.5 m telescope, two quasars are separated by 2.″8; the lensing galaxy is clearly seen and is blended with one of the quasar images. Spectroscopy taken at the Keck II telescope shows that ..

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