A search for astrophysical sources of low-energy neutrinos using the IMB detector

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cosmic Rays, Gamma Ray Bursts, Neutrinos, Radiation Sources, Supernovae, Ginga Satellite, Monte Carlo Method, Photomultiplier Tubes, Solar Maximum Mission, Temporal Resolution

Scientific paper

The temporal structure of low-energy (20 to 60 MeV) neutrino interactions within the Irvine-Michigan-Brookhaven-3 (IMB-3) detector during 863 days of livetime between 1986 May and 1991 March has been analyzed. The neutrino data are consistent with expected cosmic-ray-induced neutrino interactions with no bursts evident (excluding SN 1987A). When combined with the 327 effective livedays of IMB-1 data, we place a 90% C.L. upper limit of less than or equal to 0.71 Galactic supernovae/yr. We have also performed a temporal correlation analysis with gamma-ray bursts (GRBs) using a subset of the low-energy neutrino data. No significant correlations were observed for coincidence windows of 1 minute, 1 hour, or 1 day.

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