... quasar

Based on observations made with ESO Telescopes at La Silla and Paranal under programme IDs 275.A-5064 and 075.A-0374, with the Spitzer Space Telescope, which is operated by the JPL, CALTECH under a contract with NASA, and obtained at CTIO a division of NOAO, which is operated by AURA under cooperative agreement with the National Science Foundation.

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...1,

Present address: University of California, Santa Barbara, CA-93106, USA.

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