University of Wisconsin-Madison

IceCube Neutrinos Point to Long-Sought Cosmic Ray Accelerator

In two papers published today in Science, IceCube together with partner telescopes and observatories on Earth and in space announced the identification of blazar TXS 0506+056 as the first likely source of high-energy neutrinos and cosmic rays.



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NSF Press Conference on Breakthrough in Multi-messenger Astrophysics

An announcement of recent multimessenger astrophysics findings led by the National Science Foundation’s IceCube Neutrino Observatory at the South Pole.


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Inelasticity in high energy neutrino interactions

Once or twice per day, a muon neutrino interacts with a molecule of ice near one of the 5,000 sensors of the IceCube Neutrino Observatory. This weak interaction mediated by W boson is what scientists call a charged-current interaction, which produces a hadronic shower and a muon. The muon travels across the detector in a straight line, following almost the same direction as the original neutrino.


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Week 35 at the Pole

The satellite dome sits frosted over as it waits for the sunrise—here it’s shown backlit by a full moon.It’s a peaceful scene, which is also how IceCube’s winterovers generally described last week at the Pole.