Fermi's Large Area Telescope (LAT) observes the entire sky every three hours. In this animation, gamma rays (magenta) from the blazar jet strike Fermi's LAT. Also produced in the jet with the gamma rays are neutrinos (gray), ghostly particles that can strike -- and can even pass completely through -- Earth. This photo is already in the public domain, however, any use of it to communicate about the findings of Grant et al. or Finley et al. cannot appear online, in print or otherwise in the public domain until Thursday 11am US ET 12 July. This material relates to a paper that appeared in the 13 July 2018, issue of Science, published by AAAS. The papers, by Ice Cube Collaboration are titled, 'Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A,' and 'Neutrino emission from the direction of the blazar TXS 0506+056 prior to the IceCube-170922A alert.'
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