SDSS J102111.02+491330.4: A Newly discovered gravitationally lensed quasar

Journal Article · Thu Sep 01 04:00:00 EDT 2005 · Astronomical Journal

OSTI ID:15020359

Pindor, Bart; Eisenstein, Daniel J; Gregg, Michael D; Becker, Robert H; Inada, Naohisa; Oguri, Masamune; Hall, Patrick B; Johnston, David E; Richards, Gordon T; Schneider, Donald P; Turner, Edwin L; Brasi, Guido; Hinz, Philip M; Kenworthy, Matthew A; Miller, Doug; Barentine, J C; Brewington, Howard J; Brinkmann, J; Harvanek, Michael; Kleinman, S J ; Krzesinski, Jurek

We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is a previously unknown gravitationally lensed quasar. This lens system exhibits two images of a z = 1.72 quasar, with an image separation of 1.14'' {+-} 0.04''. Optical and near-IR imaging of the system reveals the presence of the lensing galaxy between the two quasar images. Observations of SDSS J112012.12+671116.0 indicate that it is more likely a binary quasar than a gravitational lens. This system has two quasars at a redshift of z = 1.49, with an angular separation of 1.49'' {+-} 0.02''. However, the two quasars have markedly different SEDs and no lens galaxy is apparent in optical and near-IR images of this system. We also present a list of 31 SDSS lens candidates which follow-up observations have confirmed are not gravitational lenses.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 15020359
• Report Number(s): FERMILAB-PUB-05-417-CD; arXiv eprint number astro-ph/0509296
• Journal Information: Astronomical Journal, Journal Name: Astronomical Journal Vol. 131; ISSN 0004-6256; ISSN ANJOAA
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Astrophysics
GRAVITATIONAL LENSES
QUASARS
SKY