Discovery of four gravitationally lensed quasars from the sloan digital sky survey

Masamune Oguri, Naohisa Inada, Alejandro Clocchiatti, Issha Kayo, Min Su Shin, Joseph F. Hennawi, Michael A. Strauss, Tomoki Morokuma, Donald P. Schneider, Donald G. York

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Abstract

We present the discovery of four gravitationally lensed quasars selected from the spectroscopic quasar catalog of the Sloan Digital Sky Survey (SDSS). We describe imaging and spectroscopic follow-up observations that support the lensing interpretation of the following four quasars: SDSS J0832+0404 (image separation θ = 198, source redshift zs = 1.115, lens redshift zl = 0.659); SDSS J1216+3529 (θ = 149, zs = 2.012); SDSS J1322+1052 (θ = 200, zs = 1.716); and SDSS J1524+4409 (θ = 167, zs = 1.210, zl = 0.320). Each system has two lensed images. We find that the fainter image component of SDSS J0832+0404 is significantly redder than the brighter component, perhaps because of differential reddening by the lensing galaxy. The lens potential of SDSS J1216+3529 might be complicated by the presence of a secondary galaxy near the main lensing galaxy.

Original languageEnglish (US)
Pages (from-to)520-526
Number of pages7
JournalAstronomical Journal
Volume135
Issue number2
DOIs
StatePublished - Feb 1 2008

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Oguri, M., Inada, N., Clocchiatti, A., Kayo, I., Shin, M. S., Hennawi, J. F., Strauss, M. A., Morokuma, T., Schneider, D. P., & G. York, D. (2008). Discovery of four gravitationally lensed quasars from the sloan digital sky survey. Astronomical Journal, 135(2), 520-526. https://doi.org/10.1088/0004-6256/135/2/520