Blazar and neutrino source · 22 September 2017 · announced July 2018
The high-energy neutrino IceCube-170922A arrived from the direction of a flaring gamma-ray blazar, the first evidence for a source of cosmic neutrinos.
Our part
The alert met the criteria of the H.E.S.S. neutrino follow-up programme Fabian had set up, and H.E.S.S. took part in the worldwide observing campaign.
Real-time analysis detects a neutrino of about 290 TeV.
Alert distributed to observers worldwide.
The direction becomes visible from Namibia and follow-up observations are possible.
The blazar is found in a flaring state; a campaign from radio to very-high-energy gamma rays follows.
Joint results published in Science.
IceCube, Fermi-LAT, MAGIC, AGILE, ASAS-SN, HAWC, H.E.S.S., INTEGRAL, Kanata, Kiso, Kapteyn, Liverpool Telescope, Subaru, Swift NuSTAR, VERITAS, VLA/17B-403 · 2018 · Science 361 eaat1378
From the news
A high-energy IceCube neutrino and observations across the electromagnetic spectrum linked a cosmic neutrino to the flaring blazar TXS 0506+056.
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