The KM3NeT Collaboration is composed of engineers, technicians and physicists from the institutes listed below.
 | Cyprus | |
 University of Cyprus |
Nikosia | |
 | France | |
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CEA/Saclay |
Departement d'Astrophysique, de Physique des Particules, de Physique Nucleaire et de l'Instrumentation Associee | |
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CNRS/IN2P3: APC |
AstroParticule et Cosmologie, Paris | |
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CNRS/IN2P3: CPPM |
Centre de Physique des Particules de Marseille | |
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CNRS/IN2P3: ReS
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Institut de Recherches Subatomiques, Strasbourg | |
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GRPHE
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University of Haute Alsace | |
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IFREMER |
Institut Francais de Recherche pour l'Exploitation de la Mer, Toulon | |
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Germany | |
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University of Erlangen |
Universitaet Erlangen-Nuernberg, Physikalisches Institut |
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FTZ (University of Kiel) |
Forschungs- und Technologiezentrum Westkuste, Busum | |
 | Greece | |
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HCMR |
Hellenic Centre for Marine Research (Institute of Oceanography), Anavissos | |
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HOU |
Hellenic Open University, Patras | |
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NCSR |
National Centre for Scientific Research 'Demokritos', Athens | |
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NAO/Nestor
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National Observatory of Athens/Nestor Institute of Astro-particle Physics, Athens | |
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University of Athens
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 | Ireland | |
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DIAS |
Dublin Institute for Advanced Studies | |
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Italy | |
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CNR/ ISMAR |
Istituto di Scienze Marine, La Spezia, Italy | |
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INFN - Sezione di Roma |
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INFN - Sezione di Genova |
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INFN - Sezione di Bologna |
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INFN - Sezione di Catania |
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INFN - Sezione di Napoli |
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INFN - Sezione di Bari |
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INFN - Sezione di Pisa |
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LNS |
Catania | |
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LNF |
Frascati | |
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INGV |
Istituto Nazionale di Geofisica e Vulcanologia, Rome | |
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Tecnomare SpA |
Venice | |
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The Netherlands | |
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NIKHEF |
National Institute for Nuclear and High Energy Physics, Amsterdam | |
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University of Amsterdam |
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| KVI |
University of Groningen | |
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University of Utrecht |
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Nioz |
Royal Netherlands institute for sea research | |
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Romania | |
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ISS |
Institute of Space Sciences | |
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Spain | |
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IFIC |
Istituto de Fisica Corpuscular | |
| UPV |
Universidad Politecnica de Valencia | |
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UV |
Universitat de Valencia | |
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UK | |
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University of Aberdeen |
Oceanlab | |
| University of Leeds |
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University of Liverpool |
Universitat de Valencia | |
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University of Sheffield |
Universitat de Valencia | |
