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SDSSJ0946+1006
SDSSJ0946+1006 is an unusual gravitational lens system consisting of three galaxies at distances of respectively three, six, and eleven billion light years from Earth. In a report presented at the 211th meeting of the American Astronomical Society, researchers Raphael Gavazzi and Tommaso Treu of the University of California, Santa Barbara described the discovery of a double Einstein ring produced by the gravitational lensing of light from two distant galaxies. The observations were made using the Hubble Space Telescope.
The main lens lies at redshift , with the inner ring at with an Einstein radius and magnitude , the outer ring is at with and magnitude 〔arXiv preprint: 2-Feb-2008〕 The lensing galaxy is also known as SDSSJ0946+1006 L1, with the nearer lensed galaxy as SDSSJ0946+1006 S1, and the farther lensed galaxy SDSSJ0946+1006 S2.
==External links==
*HubbleSite (Hubble Finds Double Einstein Ring ) January 10, 2008 10:00 AM (EST)
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