Astronomy: A gravitational lens observed at very high energies


A collaboration including ETH physicists at the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) observatory reports the discovery of the most distant gamma-ray source ever observed at very high energies — thanks to the 'replay' of an enormous flare by a galactic gravitational lens, as predicted according to Einstein’s theory of General Relativity.

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Tue Apr 25 20:29:03 CEST 2017
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