4.7 Article

Evidence of High-energy Neutrinos from SN1987A by Kamiokande-II and IMB

Journal

ASTROPHYSICAL JOURNAL
Volume 925, Issue 2, Pages -

Publisher

IOP Publishing Ltd
DOI: 10.3847/1538-4357/ac4269

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Possible evidence of high-energy neutrinos from SN1987A was found through the observation of upward-going muons recorded by the Kamiokande-II experiment and the IMB experiment.
High-energy neutrinos from SN1987A were searched for using upward-going muons recorded by the Kamiokande-II experiment and the IMB experiment. Between 1987 August 11 and October 20, and from an angular window of 10 degrees radius, two upward-going muon events were recorded by Kamiokande-II, and also two events were recorded by IMB. The probability that these upward-going muons were explained by a chance coincidence of atmospheric neutrinos was calculated to be 0.27%. This shows possible evidence of high-energy neutrinos from SN1987A.

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