TY - JOUR
T1 - The Sloan Digital Sky Survey quasar lens search. IV. Statistical lens sample from the fifth data release
AU - Inada, Naohisa
AU - Oguri, Masamune
AU - Shin, Min Su
AU - Kayo, Issha
AU - Strauss, Michael A.
AU - Hennawi, Joseph F.
AU - Morokuma, Tomoki
AU - Becker, Robert H.
AU - White, Richard L.
AU - Kochanek, Christopher S.
AU - Gregg, Michael D.
AU - Chiu, Kuenley
AU - Johnston, David E.
AU - Clocchiatti, Alejandro
AU - Richards, Gordon T.
AU - Schneider, Donald P.
AU - Frieman, Joshua A.
AU - Fukugita, Masataka
AU - Gott, J. Richard
AU - Hall, Patrick B.
AU - York, Donald G.
AU - Castander, Francisco J.
AU - Bahcall, Neta A.
PY - 2010/8
Y1 - 2010/8
N2 - We present the second report of our systematic search for strongly lensed quasars from the data of the Sloan Digital Sky Survey (SDSS). From extensive follow-up observations of 136 candidate objects, we find 36 lenses in the full sample of 77,429 spectroscopically confirmed quasars in the SDSS Data Release 5. We then define a complete sample of 19 lenses, including 11 from our previous search in the SDSS Data Release 3, from the sample of 36,287 quasars with i< 19.1 in the redshift range 0.6 < z < 2.2, where we require the lenses to have image separations of 1″ < 0 < 20″ and i-band magnitude differences between the two images smaller than 1.25 mag. Among the 19 lensed quasars, three have quadruple-image configurations, while the remaining 16 show double images. This lens sample constrains the cosmological constant to be ωa = 0.84+0.06-0.08(stat.)+00.097(syst.) assuming a flat universe, which is in good agreement with other cosmological observations. We also report the discoveries of seven binary quasars with separations ranging from 1/.'1to16'./6, which are identified in the course of our lens survey. This study concludes the construction of our statistical lens sample in the full SDSS-I data set.
AB - We present the second report of our systematic search for strongly lensed quasars from the data of the Sloan Digital Sky Survey (SDSS). From extensive follow-up observations of 136 candidate objects, we find 36 lenses in the full sample of 77,429 spectroscopically confirmed quasars in the SDSS Data Release 5. We then define a complete sample of 19 lenses, including 11 from our previous search in the SDSS Data Release 3, from the sample of 36,287 quasars with i< 19.1 in the redshift range 0.6 < z < 2.2, where we require the lenses to have image separations of 1″ < 0 < 20″ and i-band magnitude differences between the two images smaller than 1.25 mag. Among the 19 lensed quasars, three have quadruple-image configurations, while the remaining 16 show double images. This lens sample constrains the cosmological constant to be ωa = 0.84+0.06-0.08(stat.)+00.097(syst.) assuming a flat universe, which is in good agreement with other cosmological observations. We also report the discoveries of seven binary quasars with separations ranging from 1/.'1to16'./6, which are identified in the course of our lens survey. This study concludes the construction of our statistical lens sample in the full SDSS-I data set.
KW - Cosmology: Observations
KW - Gravitational lensing: Strong
KW - Quasars: General
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U2 - 10.1088/0004-6256/140/2/403
DO - 10.1088/0004-6256/140/2/403
M3 - Article
AN - SCOPUS:78049259726
SN - 0004-6256
VL - 140
SP - 403
EP - 415
JO - Astronomical Journal
JF - Astronomical Journal
IS - 2
ER -