Abstract
We present the results of a time-coincident event search for low-energy electron antineutrinos in the KamLAND detector with gamma-ray bursts (GRBs) from the Gamma-ray Coordinates Network and Fermi Gamma-ray Burst Monitor. Using a variable coincidence time window of ±500 s plus the duration of each GRB, no statistically significant excess above the background is observed. We place the world's most stringent 90% confidence level upper limit on the electron antineutrino fluence below 17.5 MeV. Assuming a Fermi-Dirac neutrino energy spectrum from the GRB source, we use the available redshift data to constrain the electron antineutrino luminosity and effective temperature.
Original language | English |
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Article number | 69 |
Journal | Astrophysical Journal |
Volume | 927 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2022 Mar 1 |
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science