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<dc:title xml:lang="en">ANTARES search for high-energy neutrinos from TeV-emitting blazars, Markarian 421 and 501, in coïncidence with HAWC gamma-ray tiares</dc:title>
<dcterms:alternative xml:lang="fr">Recherche avec le télescope ANTARES de neutrinos de haute énergie en provenance des blazars proches, Mrk421 et Mrk 501, en corrélation avec des émissions gamma détectés par l'observatoire HAWC</dcterms:alternative>
<dc:subject xml:lang="fr">Neutrinos de haute énergie</dc:subject>
<dc:subject xml:lang="fr">Astronomie multimessager</dc:subject>
<dc:subject xml:lang="fr">Noyaux Actifs de Galaxies</dc:subject>
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<tef:elementdEntree autoriteExterne="028951301" autoriteSource="Sudoc">Astrophysique des neutrinos</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="027393690" autoriteSource="Sudoc">Rayonnement cosmique</tef:elementdEntree>
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<tef:elementdEntree autoriteExterne="151331162" autoriteSource="Sudoc">Télescope à neutrinos ANTARES</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Les neutrinos sont des messagers uniques pour détecter les phénomènes violents de l’Univers. Les sources potentielles de neutrinos cosmiques sont, par exemple, les Noyaux Actifs de Galaxie (NAGs), ou les sursauts gammas. Dans le cas d’un accélérateur astrophysique de rayons cosmiques hadroniques, la production de neutrinos s’accompagne éventuellement d’émissions gammas de haute énergie. La recherche des coïncidences entre des neutrinos de haute énergie détectés avec le télescope à neutrinos ANTARES et des photons gamma captés par l’observatoire HAWC est présentée. La recherche dans une fenêtre temporelle particulière réduit le bruit de fond de manière significative dans les données du télescope à neutrinos et augmente donc le potentiel de découverte. Dans cette thèse, les résultats de la recherche de neutrinos détectés en corrélation avec un signal gamma en provenance de 2 NAG particulier, Markarian 421 et Markarian 501, sont présentés. En tant que blazars les plus proches de la Terre, ils constituent d’excellentes sources pour tester le scénario de connexion blazar-neutrinos, en particulier lors de leurs "bouffées" d’activités (flares) pour lesquelles la recherche de neutrinos en fonction du temps peut présenter une probabilité de détection plus élevée.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Neutrinos are unique messengers for detecting violent phenomena in the Universe. Potential sources of cosmic neutrinos are, for example, Active Galactic Nuclei (AGNs) or Gamma-Ray Bursts (GRBs). In the case of hadronic cosmic rays acceleration, the production of neutrinos is possibly accompanied by high-energy gamma-ray emissions. The search for coincidences between high-energy neutrinos detected by the ANTARES neutrino telescope and gamma-rays detected by the HAWC gamma-ray observatory is presented. Searching in a particular time window significantly reduces the background noise in the neutrino data and thus increases the discovery potential. In this thesis, the results of a search for neutrinos detected in correlation with a gamma-ray signal from two particular AGNs, Markarian 421 and Markarian 501, are presented. As the blazars closest to Earth, they are excellent sources for testing the blazar-neutrino connection scenario, especially during the increase of their activities (flares) in which the search for neutrinos may have a higher detection probability.</dcterms:abstract>
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