A New Quadruply Lensed Quasar: SDSSJ125107.57+293540.5

Abstract

We report the discovery of a quadruply imaged quasar, SDSSJ125107.57+293540.5, selected from the Sloan Digital Sky Survey. Follow-up imaging reveals that the system consists of four blue point-like components in a typical cusp lens geometry surrounding a central red galaxy. The source redshift is 0.802 and the lens redshift is 0.410. The maximum image separation between the lensed components is 1"79. While the image configuration is well reproduced by standard mass models with reasonable parameter values, the flux ratios predicted by these models differ from the observed ratios in all bands. This is suggestive of small-scale structures in this lens, although the definitive identification of the anomaly requires more accurate photometry and astrometry.

19 pages, 7 figures, AJ accepted

References in corpus (5)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release
• The Sloan Digital Sky Survey Quasar Lens Search. I. Candidate Selection Algorithm
• Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey
• Discovery of a Gravitationally Lensed Quasar from the Sloan Digital Sky Survey: SDSS J133222.62+034739.9

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• Mass models and environment of the new quadruply lensed quasar SDSS J1330+1810
• Lensed Image Angles: New Statistical Evidence for Substructure
• Galaxy-lens determination of $H_0$: the effect of the ellipse+shear modeling assumption
• New Dynamical Measurements from a Lensed Quasar Sample: Joint Analysis Constrains the Mass Profile Evolution of Lens Galaxies