Upgoing taus (image) Johannes Gutenberg Universitaet Mainz Share Print E-Mail Caption Spectrum of upgoing taus as a function of the energy of tau as it enters IceCube. The vertical band represents the energy of the tau particle necessary to deposit 2.6 PeV inside IceCube. Credit ill./©: Matthew D. Kistler and Ranjan Laha Usage Restrictions This image may only be used in connection with the press release "Mysterious IceCube event may be caused by a tau neutrino", issued by Johannes Gutenberg University Mainz on June 19, 2018. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.