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Astronomers trace cosmic ray neutrino back to remote blazar

The initial detection by the IceCube Neutrino Observatory in Antarctica, and subsequent observations of high energy radiation from the same source by space telescopes and ground-based observatories, indicate such black holes act as the particle accelerators responsible for at least some of those cosmic rays.“The evidence for the observation of the first known source of high-energy neutrinos and cosmic rays is compelling,” said Francis Halzen, a University of Wisconsin–Madison professor of physics and the lead scientist for the IceCube Neutrino Observatory.