Follow-up of multi-messenger alerts with the KM3NeT ARCA and ORCA detectors

• Main Authors: J. Palacios González, S. Celli, D. Dornic, F. Filippini, E. Le Guirriec, J. DeFavereau, G. Illuminati, M. Lamoureux, M. Mastrodicasa, R. Muller, F. Salesa Greus, A. Sánchez Losa, S. Le Stum, G. Vannoye, A. Veutro, A. Zegarelli
• Other Authors: Palacios González, J., Celli, S., Dornic, D., Filippini, F., Le Guirriec, E., Defavereau, J., Illuminati, G., Lamoureux, M., Mastrodicasa, M., Muller, R., Salesa Greus, F., Sánchez Losa, A., Le Stum, S., Vannoye, G., Veutro, A., Zegarelli, A.
• Format: Conference Object
• Language: English
• Published: Sissa Medialab srl 2023
• Subjects: neutrino; online analysi; follow up; multi-messenger; Orca
• Online Access: https://hdl.handle.net/11573/1687699

The strength of multi-messenger astronomy comes from its capability to increase the significance of a detection through the combined observation of events coincident in space and time. This is particularly valuable for transient events, since the use of a narrow time window can allow a reduction of background of the search. In KM3NeT, we are actively monitoring and analysing a variety of external triggers in real-time, including alerts like IceCube neutrinos, HAWC gamma-ray transients, LIGO-Virgo- KAGRA gravitational waves, SNEWS neutrino alerts, and others. In this contribution, we present the follow-up of various external alerts using the comple- mentary capabilities of the two KM3NeT detectors, ORCA (covering the few GeV to few TeV energy range) and ARCA (ranging from sub-TeV energies up to tens of PeV). Both detectors were collecting high-quality data with partial configurations during the period of the studied alerts, which goes from December 2021 until June 2023.