13 August 2024 – Gamma-ray bursts are promising candidate sources of high-energy astrophysical neutrinos. The recent GRB 221009A event, identified as the brightest gamma-ray burst ever detected, provides a unique opportunity to investigate hadronic emissions involving neutrinos.
KM3NeT participated in the worldwide follow-up effort triggered by the GRB 221009A event, searching for neutrino events.
In a paper with the title ‘Search for neutrino emission from GRB 221009A using the KM3NeT ARCA and ORCA detectors’ we summarise subsequent searches in the energy range from MeV up to a few PeVs.
We did not find neutrino events, but set upper limits on the neutrino emission associated with GRB 221009A.
The paper is published in:
DOI: 10.1088/1475-7516/2024/08/006
In the image:
90% CL upper limits on the neutrino flux from GRB 221009A for ARCA (blue) and ORCA (red). For comparison the results of IceCube are also shown (green) as well as the gamma-ray observations of Fermi-GBM, Fermi-LAT, and LHAASO (gray dashed lines).
