Neutrino telescopes play a key role in multi-messenger astrophysics, providing unique insights into the still-unclear processes in our Universe and its active sources. With the goal of shedding light on these mysteries, the KM3NeT collaboration is deploying a deep-sea Cherenkov neutrino telescope in the Mediterranean Sea. It comprises two detectors: identical in their design but differing by size and density. KM3NeT/ARCA, off the coast of Sicily, is optimised for high energies in the TeV-PeV range to observe astrophysical neutrinos. KM3NeT/ORCA, off the coast of Toulon (France), is designed to detect GeV–TeV atmospheric neutrinos to study oscillations and mass ordering, thereby also detecting low-energy astrophysical neutrinos and extending KM3NeT’s reach to sources at lower energies than those accessible to KM3NeT/ARCA. This contribution presents the expected performances for the detection of point-like sources using the data collected by KM3NeT/ORCA from February 2020 to September 2023. For the first time, KM3NeT/ORCA data are used to perform a binned likelihood analysis, improving KM3NeT’s sensitivity to softer spectra and enhancing the prospects for detecting neutrino sources across a wider energy range. The discovery potential and sensitivity of KM3NeT/ORCA to point sources for different spectral assumptions and over the full sky are reported. As a first application of this analysis, the direction of KM3-230213A, the ultra-high energy event recently observed by KM3NeT, is inspected, and unblinding results from the surrounding region are presented.

Extending KM3NeT’s Point-Source Searches to Lower Energies with KM3NeT/ORCA / Bouasla A.B., Attallah R., Adriani O., Albert A., Alhebsi A.R., Alshalloudi S., Alshamsi M., Alves Garre S., Ameli F., Andre M., Aphecetche L., Ardid M., Ardid S., Aublin J., Badaracco F., Bailly-Salins L., Baret B., Bariego-Quintana A., Barnard M., Becherini Y., et al.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - ELETTRONICO. - 501:(2025), pp. 0-0. (39th International Cosmic Ray Conference, ICRC 2025 che 2025) [10.22323/1.501.1026].

Extending KM3NeT’s Point-Source Searches to Lower Energies with KM3NeT/ORCA

Adriani O.;Biagi S.;Bottai S.;Cecchini V.;Celli S.;Distefano C.;Langella A.;Markou C.;Muller R.;Musumeci M.;Pacini L.;Parmar A.;Sanfilippo S.;Scaringella M.;Simonelli A.;Starodubtsev O.;Valsecchi V.;Vannuccini E.;Viola S.;
2025

Abstract

Neutrino telescopes play a key role in multi-messenger astrophysics, providing unique insights into the still-unclear processes in our Universe and its active sources. With the goal of shedding light on these mysteries, the KM3NeT collaboration is deploying a deep-sea Cherenkov neutrino telescope in the Mediterranean Sea. It comprises two detectors: identical in their design but differing by size and density. KM3NeT/ARCA, off the coast of Sicily, is optimised for high energies in the TeV-PeV range to observe astrophysical neutrinos. KM3NeT/ORCA, off the coast of Toulon (France), is designed to detect GeV–TeV atmospheric neutrinos to study oscillations and mass ordering, thereby also detecting low-energy astrophysical neutrinos and extending KM3NeT’s reach to sources at lower energies than those accessible to KM3NeT/ARCA. This contribution presents the expected performances for the detection of point-like sources using the data collected by KM3NeT/ORCA from February 2020 to September 2023. For the first time, KM3NeT/ORCA data are used to perform a binned likelihood analysis, improving KM3NeT’s sensitivity to softer spectra and enhancing the prospects for detecting neutrino sources across a wider energy range. The discovery potential and sensitivity of KM3NeT/ORCA to point sources for different spectral assumptions and over the full sky are reported. As a first application of this analysis, the direction of KM3-230213A, the ultra-high energy event recently observed by KM3NeT, is inspected, and unblinding results from the surrounding region are presented.
2025
Proceedings of Science
39th International Cosmic Ray Conference, ICRC 2025
che
2025
Bouasla A.B.; Attallah R.; Adriani O.; Albert A.; Alhebsi A.R.; Alshalloudi S.; Alshamsi M.; Alves Garre S.; Ameli F.; Andre M.; Aphecetche L.; Ardid ...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/1500335
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