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

doi:10.1088/0004-6256/135/2/520

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

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

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 z_s = 1.115, lens redshift z_l = 0.659); SDSS J1216+3529 (θ = 149, z_s = 2.012); SDSS J1322+1052 (θ = 200, z_s = 1.716); and SDSS J1524+4409 (θ = 167, z_s = 1.210, z_l = 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 language	English (US)
Pages (from-to)	520-526
Number of pages	7
Journal	Astronomical Journal
Volume	135
Issue number	2
DOIs	https://doi.org/10.1088/0004-6256/135/2/520
State	Published - Feb 1 2008

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Gravitational lensing ? quasars: general

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10.1088/0004-6256/135/2/520

Cite this

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title = "Discovery of four gravitationally lensed quasars from the sloan digital sky survey",

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.",

keywords = "Gravitational lensing ? quasars: general",

author = "Masamune Oguri and Naohisa Inada and Alejandro Clocchiatti and Issha Kayo and Shin, \{Min Su\} and Hennawi, \{Joseph F.\} and Strauss, \{Michael A.\} and Tomoki Morokuma and Schneider, \{Donald P.\} and \{G. York\}, Donald",

year = "2008",

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doi = "10.1088/0004-6256/135/2/520",

language = "English (US)",

volume = "135",

pages = "520--526",

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T1 - Discovery of four gravitationally lensed quasars from the sloan digital sky survey

AU - Oguri, Masamune

AU - Inada, Naohisa

AU - Clocchiatti, Alejandro

AU - Kayo, Issha

AU - Shin, Min Su

AU - Hennawi, Joseph F.

AU - Strauss, Michael A.

AU - Morokuma, Tomoki

AU - Schneider, Donald P.

AU - G. York, Donald

PY - 2008/2/1

Y1 - 2008/2/1

N2 - 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.

AB - 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.

KW - Gravitational lensing ? quasars: general

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JO - Astronomical Journal

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ER -

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

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All Science Journal Classification (ASJC) codes

Keywords

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