Abstract
Groups in the Asia-Pacific are celebrating the latest breakthrough from the IceCube neutrino telescope which recently presented the first evidence for high-energy neutrinos from an astrophysical source. On September 22nd 2017, the Fermi and MAGIC gamma ray telescopes followed up an IceCube alert of a high-energy neutrino event and found that it was consistent in direction with the blazar TXS 0506-056 which was observed to be in a flaring state. Moreover, in a subsequent analysis of archival IceCube data, an excess of high-energy neutrino events with respect to atmospheric backgrounds was found at the position of TXS 0506-056 between September 2014 and March 2015. These results suggest that blazars are the first identifiable sources of high-energy astrophysical neutrinos.
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