The Candidate Blazar Counterparts of the Ultra-High-Energy Event KM3-230213A
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F25%3A00389220" target="_blank" >RIV/68407700:21670/25:00389220 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.22323/1.501.1100" target="_blank" >https://doi.org/10.22323/1.501.1100</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.501.1100" target="_blank" >10.22323/1.501.1100</a>
Alternative languages
Result language
angličtina
Original language name
The Candidate Blazar Counterparts of the Ultra-High-Energy Event KM3-230213A
Original language description
The detection by the KM3NeT experiment of the ultra-high-energy event KM3-230213A marks a milestone in neutrino astrophysics. With an energy estimated of ~ 220 PeV, it is the most energetic cosmic neutrino observed to date, opening the question of its astrophysical origin. Blazars, among the most powerful cosmic accelerators, have been proposed as promising sources of both astrophysical neutrinos and ultra-high-energy cosmic rays. In this contribution, seventeen candidate blazars are identified in the 3° radius error region of KM3-230213A through their multiwavelength signatures. Using archival data and dedicated observations, their properties are characterised throughout the whole electromagnetic spectrum, from radio to gamma rays. Three sources exhibit flaring behaviour in one of the examined bands, in coincidence with the neutrino arrival time. While none of these can be unequivocally associated with the KM3-230213A event, the implications of a possible blazar origin of the KM3NeT event are discussed.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/LM2023063" target="_blank" >LM2023063: Laboratoire Souterrain de Modane – participation of the Czech Republic</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
39th International Cosmic Ray Conference (ICRC2025)
ISBN
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ISSN
1824-8039
e-ISSN
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Number of pages
13
Pages from-to
1-13
Publisher name
PoS - Proceedings of Science, Sissa Medialab srl
Place of publication
Trieste
Event location
Geneva
Event date
Jul 14, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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