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Discovery of TeV y-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
(EDP Sciences, 2013)
Very high-energy γ-ray emission from PKS 0447−439 was detected with the H.E.S.S. Cherenkov telescope array in December 2009. This blazar is one of the brightest extragalactic objects in the Fermi bright source list and has ...