A New Quadruply Lensed Quasar: SDSS J125107.57+293540.5
作者： Issha Kayo , Naohisa Inada , Donald G. York , Christopher S. Kochanek , Masamune Oguri
DOI: 10.1086/521652
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摘要: We report the discovery of a quadruply imaged quasar, SDSS J125107.57+293540.5, selected from Sloan Digital Sky Survey. Follow-up imaging reveals that system consists four blue pointlike components in typical cusp lens geometry surrounding central red galaxy. The source redshift is 0.802, and 0.410. maximum image separation between lensed 1.79''. While configuration well reproduced by standard mass models with reasonable parameter values, flux ratios predicted these differ observed all bands. This suggestive small-scale structure this lens, although definitive identification anomaly requires more accurate photometry astrometry.
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