Speaker
Description
Modern astronomy relies on the combined observation of the Universe through multiple messengers, including electromagnetic radiation, cosmic rays, gravitational waves, and neutrinos. Time correlation across these channels is essential for the discovery and characterisation of transient astrophysical sources, as well as for probing the mechanisms driving the most extreme cosmic phenomena. These objectives demand low-latency infrastructures capable of reacting promptly to external alerts and disseminating significant detections to the global multi-messenger community.
KM3NeT, a large-scale neutrino observatory under construction in the Mediterranean Sea, is already operating with partial detector configurations. It consists of two complementary deep-sea Cherenkov detectors: ARCA, targeting neutrinos in the TeV-PeV energy range, and ORCA, optimised for GeV-TeV neutrinos. In addition, both detectors are sensitive to the collective MeV neutrino emission from core-collapse supernovae. This combination provides near-continuous sky coverage and enables the monitoring of transient phenomena over a wide range of energies.
To support global multi-messenger observations, the KM3NeT Collaboration has developed a dedicated real-time analysis framework. Events are reconstructed and classified with minimal latency, allowing the rapid selection of promising neutrino candidates. The system performs continuous follow-up of external alerts from other observatories and experiments, searching for temporal and directional coincidences. In parallel, a real-time alert-sending pipeline is being deployed to automatically assess the significance of detected events and promptly issue alerts to partner facilities. Currently in an advanced commissioning phase, this alert system marks an important milestone in KM3NeT's integration into the global network of real-time multi-messenger observatories.
