PoS(ICRC2021)1102 ONLINE ICRC 2021 THE ASTROPARTICLE PHYSICS CONFERENCE Berlin | Germany 37 th International Cosmic Ray Conference 12–23 July 2021 KM3NeT Core Collapse Supernovae observation program in standalone and multi-messenger modes Alexis Coleiro, a Damien Dornic, b Vladimir Kulikovskiy, c,∗ Massimiliano Lincetto, b Marta Colomer Molla a, d and Godefroy Vannoye b ,e on behalf of the KM3NeT Collaboration (a complete list of authors can be found at the end of the proceedings) a Université de Paris, CNRS, AstroParticule et Cosmologie, F-75013, Paris, France b Aix Marseille University, CNRS/IN2P3 CPPM, Marseille, France c IINFN Sezione di Genova, Via Dodecaneso 33, Genova, 16146, Italy d Instituto de Física Corpuscular (CSIC-Universitat de València) c/ Catedrático José Beltrán, 2 E-46980 Paterna, Valencia, Spain e Ecole Normale Supérieure de Lyon„ 15 parvis René Descartes BP 7000 69342 Lyon Cedex 07 FRANCE E-mail: v kulikovskiy @ km3net.de The KM3NeT research infrastructure in the Mediterranean is a multi-purpose cubic-kilometre neutrino observatory consisting of two detectors optimised to study cosmic and atmospheric neutrinos between GeV to PeV energies. Additionally, KM3NeT multi-photomultiplier optical modules allow the detection of interaction products from neutrinos with energies of a few MeV by selecting nanosecond coincidences within the photomultipliers of the same module. The distribution of the number of photomultipliers forming a coincidence (multiplicity) for the duration of the supernova emission is used as a proxy of the average neutrino energy. Using an optimised coincidence selection the KM3NeT detectors will be sensitive to supernovae in our Galaxy and beyond. A high number of detected events from a core collapse supernova explosion is expected in KM3NeT thanks to its large effective volume. The measurement of the neutrino light curve properties, such as the light curve start time and the presence of the standing accretion shock instability oscillations is possible with such statistics. Sub-millisecond time synchronisation between KM3NeT detectors allows joint observation. Such a scheme can be also a viable solution to synchronise the KM3NeT telescopes with other detectors aiming to observe neutrino emission from core collapse supernovae through the SNEWS network. 37 th International Cosmic Ray Conference (ICRC 2021) July 12th – 23rd, 2021 Online – Berlin, Germany ∗ Presenter © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0). https://pos.sissa.it/