SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar

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We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is a previously unknown gravitationally lensed quasar. This lens system exhibits two images of a z = 1.72 quasar, with an image separation of 1''.14 {+-} 0.04. Optical and near-IR imaging of the system reveals the presence of the lensing galaxy between the two quasar images. Observations of SDSS J112012.12+671116.0 indicate that it is more likely a binary quasar than a gravitational lens. This system has two quasars at a redshift of z = 1.49, with ... continued below

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Pindor, B; Eisenstein, D J; Gregg, M D; Becker, R H; Inada, N; Oguri, M et al. November 10, 2005.

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We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is a previously unknown gravitationally lensed quasar. This lens system exhibits two images of a z = 1.72 quasar, with an image separation of 1''.14 {+-} 0.04. Optical and near-IR imaging of the system reveals the presence of the lensing galaxy between the two quasar images. Observations of SDSS J112012.12+671116.0 indicate that it is more likely a binary quasar than a gravitational lens. This system has two quasars at a redshift of z = 1.49, with an angular separation of 1''.49 {+-} 0.02. However, the two quasars have markedly different SEDs and no lens galaxy is apparent in optical and near-IR images of this system. We also present a list of 31 SDSS lens candidates which follow-up observations have confirmed are not gravitational lenses.

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PDF-file: 28 pages; size: 0 Kbytes

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  • Journal Name: The Astronomical Journal; Journal Volume: 131; Journal Issue: 1

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  • Report No.: UCRL-JRNL-218570
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 888606
  • Archival Resource Key: ark:/67531/metadc885347

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Office of Scientific & Technical Information Technical Reports

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  • November 10, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 9, 2016, 7:05 p.m.

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Pindor, B; Eisenstein, D J; Gregg, M D; Becker, R H; Inada, N; Oguri, M et al. SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar, article, November 10, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc885347/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.