TY - JOUR
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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U2 - 10.1088/0004-6256/135/2/520
DO - 10.1088/0004-6256/135/2/520
M3 - Article
AN - SCOPUS:50849138226
SN - 0004-6256
VL - 135
SP - 520
EP - 526
JO - Astronomical Journal
JF - Astronomical Journal
IS - 2
ER -