Chandra Observations of SDSS J1004+4112: Constraints on the Lensing Cluster and Anomalous X-Ray Flux Ratios of the Quadruply Imaged Quasar

Abstract

We present results from Chandra observations of SDSS J1004+4112, a strongly lensed quasar system with a maximum image separation of 15". All four bright images of the quasar, as well as resolved X-ray emission originating from the lensing cluster, are clearly detected. The emission from the lensing cluster extends out to approximately 1.5 arcmin. We measure the bolometric X-ray luminosity and temperature of the lensing cluster to be 4.7e44 erg s^-1 and 6.4 keV, consistent with the luminosity-temperature relation for distant clusters. The mass estimated from the X-ray observation shows excellent agreement with the mass derived from gravitational lensing. The X-ray flux ratios of the quasar images differ markedly from the optical flux ratios, and the combined X-ray spectrum of the images possesses an unusually strong Fe Kalpha emission line, both of which are indicative of microlensing.

9 pages, 5 figures. Accepted for publication in ApJ. Version with high-quality color figures at http://cosmic.riken.jp/ota/publications/index.html

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• The Relevance of the Cosmological Constant for Lensing
• X-ray Monitoring of Gravitational Lenses With Chandra
• Measuring Microlensing using Spectra of Multiply Lensed Quasars
• Cosmological constant and lensing
• Non-parametric strong lens inversion of SDSS J1004+4112
• Discovery of Energy Dependent X-ray Microlensing in Q2237+0305
• Strong lensing in the Einstein-Straus solution
• Spectroscopic Confirmation of the Fifth Image of SDSS J1004+4112 and Implications for the M_BH-sigma_* Relation at z=0.68
• Cosmological constant and time delay
• Confirmation of Planet-Mass Objects in Extragalactic Systems
• The Longest Delay: a 14.5 Yr Campaign to Determine the Third Time Delay in the Lensing Cluster SDSS~J1004+4112
• Properties of Wide-separation Lensed Quasars by Clusters of Galaxies in the SDSS
• The faintest radio source yet: EVLA observations of the gravitational lens SDSS J1004+4112
• Extended X-ray Monitoring of Gravitational Lenses with Chandra and Joint Constraints on X-ray Emission Regions
• The UV--mid-IR Spectral Energy Distribution of a z=1.7 Quasar Host Galaxy
• Gravitational Microlensing: A parallel, large-data implementation
• Spectroscopy and polarimetry of the gravitationally lensed quasar SDSS J1004+4112 with the 6m SAO RAS telescope
• Broad Iron Emission from Gravitationally Lensed Quasars Observed by Chandra
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• Effect of the spatial curvature on light bending and time delay in curved Einstein-Straus--de Sitter spacetime
• Systematic search for lensed X-ray sources in the CLASH fields