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.


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.


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.


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.