A Search for Very High Energy Neutrinos from Active Galactic Nuclei

Details A Search for Very High Energy Neutrinos from Active Galactic Nuclei A Search for Very High Energy Neutrinos from Active Galactic Nuclei

1997-05-24

arxiv.org/abs/astro-ph/9705198v2

Astronomy and Astrophysics

Astrophysics

contribution to 25th ICRC Durban, South Africa

Scientific paper

We report the results of a search for neutrino-induced particle cascades using a deep ocean water Cherenkov detector. The effective mass of the detector, a string of seven 40 cm diameter photomultipliers at 5.2 m spacing, is found through simulation analysis to be surprisingly large: greater than 1 megaton of water at incident neutrino energies of 1 PeV. We find no evidence for neutrino-induced cascades in 18.6 hours of observation. Although the limit implied by this observation is the strongest yet for predictions of active galatic nuclei (AGN) neutrinos at energies above 100 TeV, perhaps the more intriguing result is that the power of these techniques can be exploited to test these AGN models in a relatively short time.

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