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2026
article
Characterizing Candidate Blazar Counterparts of the Ultra-high-energy Event KM3-230213A
O. Adriani, S. Aiello, A. Albert, A. R. Alhebsi, M. Alshamsi, S. Alves Garre, A. Ambrosone, F. Ameli, M. Andre, L. Aphecetche, M. Ardid, S. Ardid, J. Aublin, F. Badaracco, L. Bailly-Salins, Z Bardačová, B. Baret, A. Bariego-Quintana, Y. Becherini, M. Bendahman, F. Benfenati Gualandi, M. Benhassi, M. Bennani, D. M. Benoit, E. Berbee, E. Berti, V. Bertin, P. Betti, S. Biagi, M. Boettcher, D. Bonanno, S. Bottai, A. B. Bouasla, J. Boumaaza, M. Bouta, M. Bouwhuis, C. Bozza, R. M. Bozza, H. Brânzaş, F. Bretaudeau, M. Breuhaus, R. Bruijn, J. Brunner, R. Bruno, E. Buis, R. Buompane, S. Buson, J. Busto, B. Caiffi, D. Calvo, A. Capone, F. Carenini, V. Carretero, T. Cartraud, P. Castaldi, V. Cecchini, S. Celli, L. Cerisy, M. Chabab, A. Chen, S. Cherubini, T. Chiarusi, M. Circella, R. Clark, R Cocimano, J. A. B. Coelho, A. Coleiro, A. Condorelli, R. Coniglione, P. Coyle, A. Creusot, G. Cuttone, R. Dallier, A. De Benedittis, G. De Wasseige, V. Decoene, P. Deguire, I. Del Rosso, L. S. Di Mauro, I. Di Palma, A. F. Díaz, D Diego-Tortosa, C. Distefano, A. Domi, C. Donzaud, D. Dornic, E. Drakopoulou, D. Drouhin, J. G. Ducoin, P. Duverne, R. Dvornický, T. Eberl, E. Eckerová, A. Eddymaoui, T. van Eeden, M. Eff, D. van Eijk, I. El Bojaddaini, S. El Hedri, S. El Mentawi, V. Ellajosyula, A. Enzenhöfer, G. Ferrara, M. D. Filipović, F. Filippini, D Franciotti, L. A. Fusco, T. Gál, J. García Méndez, A. Garcia Soto, C. Gatius Oliver, N. Geisselbrecht, E. Genton, H. Ghaddari, L. Gialanella, B. K. Gibson, E. Giorgio, I. Goos, P. Goswami, S. R. Gozzini, R. Gracia, C. Guidi, B. Guillon, M Gutierrez, C. Haack, H. van Haren, A. Heijboer, L. Hennig, J.J Hernández-Rey, A. Idrissi, W. Idrissi Ibnsalih, G. Illuminati, O. Janik, D. Joly, M. de Jong, P. de Jong, B. J. Jung, P. Kalaczyński, G. Kalaitzidakis, J. Keegans, Kikvadze V., G. Kistauri, C. Kopper, A. Kouchner, Yu. A. Kovalev, Y. Y. Kovalev, L. Krupa, V. Kueviakoe, V. Kulikovskiy, R. Kvatadze, M. Labalme, R. Lahmann, M. Lamoureux, G. Larosa, C. Lastoria, J. Lazar, A. Lazo, S. Le Stum, G. Lehaut, V. Lematre, E. Leonora, N. Lessing, G. Levi, M. Lincetto, M. Lindsey Clark, F. Longhitano, F. Magnani, J. Majumdar, L. Malerba, F. Mamedov, A. Manfreda, A. Manousakis, M. Marconi, A. Margiotta, A. Marinelli, C. Markou, L. Martin, M. Mastrodicasa, S. Mastroianni, J. Mauro, K. C. K. Mehta, A. Meskar, G. Miele, P. Migliozzi, E. Migneco, M. L. Mitsou, C. M. Mollo, L. Morales-Gallegos, N. Mori, A. Moussa, I. Mozun Mateo, R. Muller, M. R. Musone, M. Musumeci, S. Navas, A. Nayerhoda, C. A. Nicolau, B. Nkosi, B. O’Fearraigh, V. Oliviero, A. Orlando, E. Oukacha, L. Pacini, D. Paesani, J. Palacios González, G. Papalashvili, P. Papini, V. Parisi, A. Parmar, E.J. Pastor Gomez, C. Pastore, A. M. Păun, G. E. Păvălaş, S. Peña Martínez, M. Perrin-Terrin, V. Pestel, R. Pestes, M. Petropavlova, L. Pfeiffer, P. Piattelli, A. Plavin, C. Poirè, V. Popa, T. Pradier, J. Prado, S. Pulvirenti, C.A Quiroz-Rangel, N. Randazzo, A. Ratnani, S. Razzaque, I.C Rea, D. Real, G. Riccobene, J. Robinson, A. Romanov, E. Ros, A. Šaina, F. Salesa Greus, D. F. E. Samtleben, A. Sánchez Losa, S. Sanfilippo, M. Sanguineti, D. Santonocito, P. Sapienza, M. Scaringella, M. Scarnera, J. Schnabel, J. Schumann, H. M. Schutte, J. Seneca, N. Sennan, P. A. Sevle Myhr, I. Sgura, R. Shanidze, A. Sharma, Y. Shitov, F. Šimkovic, A. Simonelli, A. Sinopoulou, B. Spisso, M. Spurio, O. Starodubtsev, D. Stavropoulos, I. Štekl, D. Stocco, M. Taiuti, G. Takadze, Y. Tayalati, H. Thiersen, S. Thoudam, I. Tosta e Melo, B. Trocmé, V. Tsourapis, S. V. Troitsky, E. Tzamariudaki, A. Ukleja, A. Vacheret, V. Valsecchi, V. Van Elewyck, G. Vannoye, E. Vannuccin, G. Vasileiadis, F. Vazquez de Sola, A. Veutro, S. Viola, D. Vivolo, A van Vliet, E. de Wolf, I. Lhenry-Yvon, S. Zavatarelli, A. Zegarelli, D. Zito, J. D. Zornoza, J. Zúñiga, N. Zywucka, KM3NeT collaboration, Jose Maria Sanchez Zaballa, A. Azzollini, A. Bremer, MessMapp Group, A. Acharyya, A. Adelfio, M. Ajello, L. Baldini, C. Bartolini, R. Bellazzini, E. Bissaldi, R. D. Blandford, R. Bonino, P. Bruel, R. A. Cameron, R. Caputo, P. A. Caraveo, F. Casaburo, F. Casini, E. Cavazzuti, G. Chiaro, N. Cibrario, S. Ciprini, G. Cozzolongo, P. Cristarella Orestano, F. Cuna, S. Cutini, F. D’Ammando, D. DePalo, N. Di Lalla, A. Dinesh, L. Di Venere, A. Domínguez, S. Fegan, C. Fernández, A. Franckowiak, Y. Fukazawa, P. Fusco, F. Gargano, S. Garrappa, C. Gasbarra, D. Gasparrini, S. Germani, F. Giacchino, N. Giglietto, M. Giliberti, F. Giordano, M. Giroletti, I. A. Grenier, S. Guiriec, R. Gupta, M. Hashizume, E. Hays, J.W. Hewitt, A H Airasca, D. Horan, X. Hou, T. Kayanoki, M. Kuss, S. Larsson, A. Laviron, T. Lewis, A. Liguori, J. Li, P. Loizzo, F. Longo, F. Loparco, L. Lorusso, M. N. Lovellette, P. Lubrano, S. Maldera, D. Malyshev, L. Marcotulli, G. Martí-Devesa, R. Martinelli, M. N. Mazziotta, I. Mereu, M. Meyer, M. Michailidis, P. F. Michelson, T. Mizuno, P. Monti-Guarnieri, M. E. Monzani, A. Morselli, I. V. Moskalenko, M. Negro, N. Omodei, M. Orienti, E. Orlando, J. F. Ormes, D. Paneque, G. Panzarini, M. Persic, M. Pesce-Rollins, R. Pillera, T. A. Porter, G. Principe, J. L. Racusin, S. Rainò, R. Rando, B. Rani, S. Rani, M. Razzano, A. Reimer, O. Reimer, M. Rocamora Bernal, M. Sánchez-Conde, P. M. Saz Parkinson, D. Serini, C. Sgrò, V. Sharma, E. J. Siskind, P. Spinelli, D. J. Suson, H. Tajima, D. F. Torres, J. Valverde, P. Veres, K. Wood, G. Zaharijas, H. Zhang, Fermi-LAT Collaboration, A. C. S. Readhead, V. Pavlidou, J. A. Zensus, M. F. Aller, P. V. De la Parra, M. Hodges, T. Hovatta, S. Kiehlmann, I. Liodakis, W. Max-Moerbeck, B. Molina, T. J. Pearson, V. Ravi, R. A. Reeves, A. Synani, K. Tassis, Owens Valley Radio Observatory 40-m Telescope Group, A. Foisseau, F. Cangemi, C. Lachaud, P. Maggi, D. Gotz, L. Xin, B. Cordier, O. Godet, A. Goldwurm, H. Goto, X. Han, N. Leroy, C. Plasse, Y. Qiu, J. Rodriguez, J. Wang, J. Wei, SVOM Collaboration, P. Baldini, J. Buchner, А. К. Эркенов, N. Globus, A. Merloni, A. Paggi, A. V. Popkov, D. Porquet, M. Salvato, Y. V. Sotnikova, P. A. Voitsik
0Citations signalées — pas une note de qualité
154Institutions déclarées
31Pays d’affiliation déclarés
Résumé fourni par la source
High-energy astrophysical neutrinos serve as crucial messengers for understanding hadronic acceleration processes and identifying the origins of cosmic rays, with blazars among the most promising neutrino sources. The KM3NeT experiment reported the detection of an ultrahigh-energy neutrino with an energy estimate of ∼220 PeV, the most energetic yet observed. The neutrino arrival direction has a 99% confidence region of 3° radius centered at R.A. 94.3, decl. −7.8 (J2000). In this work, 17 candidate blazars located within this region are identified. Comprehensive new observations and archival data analysis for these sources are presented. The study provides a complete multiwavelength coverage across radio, optical, X-ray, and gamma-ray bands, including proprietary data and dedicated follow-up observations. This study highlights flaring behavior in several candidate counterparts. One object exhibits a radio flare coinciding with the neutrino arrival time, with a pre-trial chance probability of 0.26%. Only for this object, the chance probability could be quantified in a robust way. Another candidate displays a rising trend in X-ray flux in a 1 yr window around the neutrino arrival time, while a third undergoes a gamma-ray flare during the same period. Based on the observational findings presented here, while none of these candidates can conclusively be linked to the neutrino, the implications of a possible blazar origin for the KM3NeT event are discussed.
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Institutions déclarées
Istituto Nazionale di Fisica Nucleare, Sezione di FirenzeUniversity of FlorenceIstituto Nazionale di Fisica Nucleare, Sezione di CataniaCentre National de la Recherche ScientifiqueUniversité de Haute-AlsaceInstitut Pluridisciplinaire Hubert CurienUniversité de StrasbourgKhalifa University of Science and TechnologyAix-Marseille UniversitéCentre de physique des particules de MarseilleInstitut National de Physique Nucléaire et de Physique des ParticulesInstituto de Física CorpuscularIstituto Nazionale di Fisica Nucleare, Sezione di NapoliIstituto Nazionale di Fisica Nucleare, Sezione di Roma IUniversitat Politècnica de CatalunyaIMT AtlantiqueNantes UniversitéUniversitat Politècnica de ValènciaUniversité Paris CitéIstituto Nazionale di Fisica Nucleare, Sezione di GenovaUniversity of GenoaÉcole Nationale Supérieure d'Ingénieurs de CaenNormandie UniversitéLaboratoire de Physique Corpusculaire de CaenUniversité de Caen NormandieIstituto Nazionale di Fisica Nucleare, Sezione di BolognaUniversity of BolognaUniversity of Campania "Luigi Vanvitelli"University of HullNational Institute for Subatomic PhysicsIstituto Nazionale di Fisica Nucleare, Laboratori Nazionali del SudNorth-West UniversityBadji Mokhtar-Annaba UniversityMohammed V UniversityUniversity of SalernoIstituto Nazionale di Fisica Nucleare, Gruppo Collegato di SalernoUniversity of AmsterdamNetherlands Organisation for Applied Scientific ResearchUniversity of WürzburgDeutsches Elektronen-Synchrotron DESYSapienza University of RomeCadi Ayyad UniversityUniversity of the WitwatersrandUniversity of CataniaIstituto Nazionale di Fisica Nucleare, Sezione di BariUCLouvainUniversidad de GranadaFriedrich-Alexander-Universität Erlangen-NürnbergNational Centre of Scientific Research "Demokritos"Institute of Nuclear and Particle PhysicsComenius University BratislavaCzech Technical University in PragueMohamed I UniversityWestern Sydney UniversityRoyal Netherlands Institute for Sea ResearchLeiden UniversityJagiellonian UniversityNicolaus Copernicus Astronomical CenterAGH University of KrakowMax Planck Institute for Radio AstronomyTbilisi State UniversityGeorgian Technical UniversityInstitut Universitaire de FranceInstitute for Nuclear ResearchUniversity of SharjahNational Centre for Nuclear ResearchInstituto de Astrofísica de CanariasHarvard University PressInstitute of Space Science - INFLPR SubsidiaryUniversité Mohammed VI PolytechniqueUniversity of JohannesburgLomonosov Moscow State UniversityLaboratoire Univers et Particules de MontpellierUniversity of Southern DenmarkCentre for Cosmology and Particle Physics PhenomenologyIstituto Nazionale di Fisica Nucleare, Sezione di PerugiaClemson UniversityUniversity of PisaIstituto Nazionale di Fisica Nucleare, Sezione di PisaUniversity of TrentoPolytechnic University of BariSLAC National Accelerator LaboratoryKavli Institute for Particle Astrophysics and CosmologyStanford UniversityIstituto Nazionale di Fisica Nucleare, Sezione di TorinoUniversity of TurinÉcole PolytechniqueGoddard Space Flight CenterDeleted InstitutionIstituto di Astrofisica Spaziale e Fisica Cosmica di MilanoAgenzia Spaziale ItalianaIstituto Nazionale di Fisica Nucleare, Roma Tor VergataUniversity of PerugiaIstituto di Radioastronomia di BolognaUniversidad Complutense de MadridUniversidad Autónoma de MadridRuhr University BochumHiroshima UniversityWeizmann Institute of ScienceUniversity of Rome Tor VergataCommissariat à l'Énergie Atomique et aux Énergies AlternativesUniversité Paris-SaclayAstrophysique, Instrumentation et ModélisationCEA Paris-SaclayGeorge Washington UniversityUniversity of North FloridaChinese Academy of SciencesYunnan ObservatoriesAlbaNovaFraunhofer Chalmers Research Centre for Industrial MathematicsKTH Royal Institute of TechnologyMichigan Technological UniversityUniversity of Science and Technology of ChinaUniversity of TriesteIstituto Nazionale di Fisica Nucleare, Sezione di TriesteThe Aerospace CorporationYale UniversityVatican Secret ArchivesLouisiana State UniversityUniversity of DenverMax Planck Institute for PhysicsOsservatorio Astronomico di PadovaUniversity of PaduaIstituto Nazionale di Fisica Nucleare, Sezione di PadovaUniversity of Maryland, Baltimore CountyUniversität InnsbruckUniversity of California, Santa CruzReal Time Tomography (United States)Purdue University NorthwestNagoya UniversityInstitució Catalana de Recerca i Estudis AvançatsInstitut d'Estudis Espacials de CatalunyaInstitute of Space SciencesUnited States Naval Research LaboratoryPraxis (United States)University of Nova GoricaCalifornia Institute of TechnologyUniversity of CreteFoundation for Research and Technology HellasUniversity of MichiganUniversity of ConcepciónUniversity of TurkuAalto UniversityUniversity of ChileObservatoire astronomique de StrasbourgNational Astronomical ObservatoriesUniversité Toulouse III - Paul SabatierUniversité Fédérale de Toulouse Midi-PyrénéesInstitut de Recherche en Astrophysique et PlanétologieLaboratoire de Physique des 2 Infinis Irène Joliot-CurieMax Planck Institute for Extraterrestrial PhysicsSpecial Astrophysical ObservatoryUniversidad Autónoma de Baja CaliforniaEnsenada Institute of Technology Une affiliation ne permet pas de déduire la nationalité d’un auteur.
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Astrophysics and Cosmic PhenomenaNeutrino Physics ResearchRadioactive Decay and Measurement Techniques