Prompt Searches for Very-high-energy γ-Ray Counterparts to IceCube Astrophysical Neutrino Alerts
  • Abhir, J.
  • Biland, A.
  • Brand, K.
  • Bretz, T.
  • Dorner, D.
  • ... Ha, C.
  • 외 828명
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The search for sources of high-energy astrophysical neutrinos can be significantly advanced through a multimessenger approach, which seeks to detect the γ-rays that accompany neutrinos as they are produced at their sources. Multimessenger observations have so far provided the first evidence for a neutrino source, illustrated by the joint detection of the flaring blazar TXS 0506+056 in high-energy (E > 1 GeV) and very-high-energy (VHE; E > 100 GeV) γ-rays in coincidence with the high-energy neutrino IceCube-170922A, identified by IceCube. Imaging atmospheric Cherenkov telescopes (IACTs), namely FACT, H.E.S.S., MAGIC, and VERITAS, continue to conduct extensive neutrino target-of-opportunity follow-up programs. These programs have two components: follow-up observations of single astrophysical neutrino candidate events (such as IceCube-170922A), and observation of known γ-ray sources after the identification of a cluster of neutrino events by IceCube. Here we present a comprehensive analysis of follow-up observations of high-energy neutrino events observed by the four IACTs between 2017 September (after the IceCube-170922A event) and 2021 January. Our study found no associations between γ-ray sources and the observed neutrino events. We provide a detailed overview of each neutrino event and its potential counterparts. Furthermore, a joint analysis of all IACT data is included, yielding combined upper limits on the VHE γ-ray flux.

키워드

LARGE-AREA TELESCOPEMAGIC TELESCOPESPYTHON PACKAGEMAJOR UPGRADECRAB-NEBULAPERFORMANCECATALOGMULTIWAVELENGTHASTROPYBLAZARS
제목
Prompt Searches for Very-high-energy γ-Ray Counterparts to IceCube Astrophysical Neutrino Alerts
저자
Abhir, J.Biland, A.Brand, K.Bretz, T.Dorner, D.Eisenberger, L.Elsaesser, D.Guenther, P.Hasan, S.Hildebrand, D.Mannheim, K.Linhoff, M.Pfeifle, F.Rhode, W.Schleicher, B.Sliusar, V.Vorbrugg, M.Walter, R.Aharonian, F.Benkhali, F. AitAschersleben, J.Ashkar, H.Backes, M.Martins, V. BarbosaBatzofin, R.Becherini, Y.Berge, D.Boettcher, M.Boisson, C.Bolmont, J.Borowska, J.Brose, R.Brown, A.Brun, F.Bruno, B.Casanova, S.Celic, J.Cerruti, M.Chen, A.Chernyakova, M.Chibueze, J.Chibueze, O.Cornejo, B.Cotter, G.Cozzolongo, G.Damascene Mbarubucyeye, J.de Assis Scarpin, J.Delgado Giles, A.Djannati-Atai, A.Djuvsland, J.Dmytriiev, A.Egberts, K.Egg, K.Einecke, S.Ernenwein, J. -P.Nieves, C. EscanuelaFeijen, K.Filipovic, M.Fontaine, G.Funk, S.Gabici, S.Glicenstein, J. F.Goswami, P.Grolleron, G.Hess, B.Hinton, J. A.Holler, M.Jamrozy, M.Jankowsky, F.Jung-Richardt, I.Kasai, E.Katarzynski, K.Katjaita, H.Kerszberg, D.Khatoon, R.Khelifi, B.Kluzniak, W.Komin, Nu.Konno, R.Kosack, K.Kostunin, D.Mezek, G. 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DOI
10.3847/1538-4357/ae2c4e
발행일
2026-02
유형
Article
저널명
Astrophysical Journal
997
2

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