Mass models and environment of the new quadruply lensed quasar SDSS J1330+1810
Abstract
We present the discovery of a new quadruply lensed quasar. The lens system, SDSS J1330+1810 at zs = 1.393, was identified as a lens candidate from the spectroscopic sample of the Sloan Digital Sky Survey. Optical and near-infrared images clearly show four quasar images with a maximum image separation of 1.76 arcsec, as well as a bright lensing galaxy. We measure a redshift of the lensing galaxy of zl = 0.373 from absorption features in the spectrum. We find a foreground group of galaxies at z = 0.31, centred at ~120 arcsec south-west of the lens system. Simple mass models fit the data quite well, including the flux ratios between images, although the lens galaxy appears to be ~1 mag brighter than expected by the Faber-Jackson relation. Our mass modelling suggests that shear from nearby structure is affecting the lens potential.
This paper includes data gathered with the 6.5-m Magellan telescopes located at Las Campanas Observatory, Chile. Based on observations obtained with the Apache Point Observatory 3.5-m telescope, which is owned and operated by the Astrophysical Research Consortium. Use of the University of Hawaii 2.2-m telescope for the observations is supported by National Astronomical Observatory of Japan (NAOJ). E-mail: oguri@slac.stanford.edu- Publication:
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Monthly Notices of the Royal Astronomical Society
- Pub Date:
- December 2008
- DOI:
- 10.1111/j.1365-2966.2008.14032.x
- arXiv:
- arXiv:0809.0913
- Bibcode:
- 2008MNRAS.391.1973O
- Keywords:
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- gravitational lensing;
- quasars: individual: SDSS J133018.65+181032.1;
- Astrophysics
- E-Print:
- 9 pages, 10 figures, 2 tables, accepted for publication in MNRAS