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

Oguri M.; Inada, N; Clocchiatti, A.; Kayo, I; Shin, MS; Hennawi, JF; STRAUSS, MA; Morokuma, T; Schneider, DP; York, DG

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. © 2008. The American Astronomical Society. All rights reserved.

Más información

Título según WOS: Discovery of four gravitationally lensed quasars from the Sloan Digital Sky Survey
Título según SCOPUS: Discovery of four gravitationally lensed quasars from the sloan digital sky survey
Título de la Revista: ASTRONOMICAL JOURNAL
Volumen: 135
Número: 2
Editorial: IOP PUBLISHING LTD
Fecha de publicación: 2008
Página de inicio: 520
Página final: 526
Idioma: English
URL: http://www.scopus.com/inward/record.url?eid=2-s2.0-50849138226&partnerID=q2rCbXpz
DOI:

10.1088/0004-6256/135/2/520

Notas: ISI, SCOPUS