Prompt Searches for Very-high-energy γ-Ray Counterparts to IceCube Astrophysical Neutrino Alerts
- Autori: Abhir, J.; Biland, A.; Brand, K.; Bretz, T.; Dorner, D.; Eisenberger, L.; Elsaesser, D.; Günther, P.; Hasan, S.; Hildebrand, D.; Mannheim, K.; Linhoff, M.; Pfeifle, F.; Rhode, W.; Schleicher, B.; Sliusar, V.; Vorbrugg, M.; Walter (FACT Collaboration), R.; Aharonian, F.; Ait Benkhali, F.; Aschersleben, J.; Ashkar, H.; Backes, M.; Barbosa Martins, V.; Batzofin, R.; Becherini, Y.; Berge, D.; Böttcher, 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-Ataï, A.; Djuvsland, J.; Dmytriiev, A.; Egberts, K.; Egg, K.; Einecke, S.; Ernenwein, J.-.; Escañuela Nieves, C.; Feijen, 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.; Katarzyński, K.; Katjaita, H.; Kerszberg, D.; Khatoon, R.; Khélifi, B.; Kluźniak, W.; Komin, N.; Konno, R.; Kosack, K.; Kostunin, D.; Kukec Mezek, G.; Lang, R.G.; Lemière, A.; Lemoine-Goumard, M.; Lenain, J.-.; Luashvili, A.; Mackey, J.; Marandon, V.; Martí-Devesa, G.; Marx, R.; Mayer, M.; Mehta, A.; Mitchell, A.; Moderski, R.; Moghadam, M.O.; Mohrmann, L.; Moulin, E.; De Naurois, M.; Niemiec, J.; De Ona Wilhelmi, E.; Panny, S.; Panter, M.; Parsons, R.D.; Pensec, U.; Pichard, P.; Pühlhofer, G.; Punch, M.; Quirrenbach, A.; Regeard, M.; Reimer, O.; Ren, H.; Rieger, F.; Rowell, G.; Rudak, B.; Sabri, K.; Sahakian, V.; Salzmann, H.; Sasaki, M.; Schäfer, J.; Schüssler, F.; Schutte, H.M.; Senniappan, M.; Shapopi, J.N.S.; Sharma, A.; Sol, H.; Spencer, S.; Stawarz, Ł.; Steenkamp, R.; Steinmassl, S.; Steppa, C.; Takahashi, T.; Tanaka, T.; Taylor, A.M.; Tsirou, M.; Van Eldik, C.; Vecchi, M.; Venter, C.; Vink, J.; Wach, T.; Wagner, S.J.; Wierzcholska, A.; Zacharias, M.; Zdziarski, A.A.; Zech, A.; Collaboration), N.Ż.(.E.S.S.; Abe, S.; Abhir, J.; Abhishek, A.; Aguasca-Cabot, A.; Agudo, I.; Aniello, T.; Ansoldi, S.; Antonelli, L.A.; Arbet Engels, A.; Arcaro, C.; Artero, M.; Asano, K.; Babić, A.; Bakshi, C.; Barres De Almeida, U.; Barrio, J.A.; Barrios-Jiménez, L.; Batković, I.; Baxter, J.; Becerra González, J.; Bednarek, W.; Bernardini, E.; Bernete, J.; Berti, A.; Besenrieder, J.; Bigongiari, C.; Biland, A.; Blanch, O.; Bökenkamp, H.; Bonnoli, G.; Bošnjak, Ž.; Bronzini, E.; Burelli, I.; Campoy-Ordaz, A.; Carosi, A.; Carosi, R.; Carretero-Castrillo, M.; Castro-Tirado, A.J.; Cerasole, D.; Ceribella, G.; Chai, Y.; Chilingarian, A.; Cifuentes, A.; Contreras, J.L.; Cortina, J.; Covino, S.; D’Amico, G.; Da Vela, P.; Dazzi, F.; De Angelis, A.; De Lotto, B.; Delfino, M.; Delgado Mendez, C.; Di Pierro, F.; Di Tria, R.; Di Venere, L.; Dinesh, A.; Dominis Prester, D.; Donini, A.; Dorner, D.; Doro, M.; Eisenberger, L.; Elsaesser, D.; Escudero, J.; Fariña, L.; Fattorini, A.; Foffano, L.; Font, L.; Fröse, S.; Fukazawa, Y.; Gasparyan, S.; Gaug, M.; Giesbrecht Paiva, J.G.; Giglietto, N.; Giordano, F.; Gliwny, P.; Godinović, N.; Gradetzke, T.; Grau, R.; Green, D.; Green, J.G.; Günther, P.; Hadasch, D.; Hahn, A.; Hassan, T.; Heckmann, L.; Hrupec, D.; Imazawa, R.; Israyelyan, D.; Jiménez Martínez, I.; Jiménez Quiles, J.; Jormanainen, J.; Kankkunen, S.; Kayanoki, T.; Kerszberg, D.; Konrad, J.; Kouch, P.M.; Kubo, H.; Kushida, J.; Láinez, M.; Lamastra, A.; Lindfors, E.; Lombardi, S.; Longo, F.; López-Coto, R.; López-Moya, M.; López-Oramas, A.; Loporchio, S.; Lulić, L.; Lyard, E.; Majumdar, P.; Makariev, M.; Mallamaci, M.; Maneva, G.; Manganaro, M.; Mangano, S.; Marchesi, S.; Mariotti, M.; Martínez, M.; Maruševec, P.; Mas-Aguilar, A.; Mazin, D.; Menchiari, S.; Méndez Gallego, J.; Miceli, D.; Miranda, J.M.; Mirzoyan, R.; Molero González, M.; Molina, E.; Mondal, H.A.; Moralejo, A.; Nakamori, T.; Nanci, C.; Neustroev,
- Anno di pubblicazione: 2026
- Tipologia: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/708787
Abstract
The search for sources of high-energy astrophysical neutrinos can be significantly advanced through a multimessenger approach, which seeks to detect the gamma-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) gamma-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 gamma-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 gamma-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 gamma-ray flux.