Related papers: Patterns in the multi-wavelength behavior of candi…

Investigation of two Fermi-LAT gamma-ray blazars coincident with high-energy neutrinos detected by IceCube

After the identification of the gamma-ray blazar TXS 0506+056 as the first compelling IceCube neutrino source candidate, we perform a systematic analysis of all high-energy neutrino events satisfying the IceCube realtime trigger criteria.…

High Energy Astrophysical Phenomena · Physics 2019-08-07 S. Garrappa , S. Buson , A. Franckowiak , B. J. Shappee , J. F. Beacom , S. Dong , T. W. -S. Holoien , C. S. Kochanek , J. L. Prieto , K. Z. Stanek , T. A. Thompson , M. G. Aartsen , M. Ackermann , J. Adams , J. A. Aguilar , M. Ahlers , M. Ahrens , C. Alispach , K. Andeen , T. Anderson , I. Ansseau , G. Anton , C. Argüelles , J. Auffenberg , S. Axani , P. Backes , H. Bagherpour , X. Bai , A. Barbano , S. W. Barwick , V. Baum , R. Bay , J. J. Beatty , K. -H. Becker , J. Becker Tjus , S. BenZvi , D. Berley , E. Bernardini , D. Z. Besson , G. Binder , D. Bindig , E. Blaufuss , S. Blot , C. Bohm , M. Börner , S. Böser , O. Botner , E. Bourbeau , J. Bourbeau , F. Bradascio , J. Braun , H. -P. Bretz , S. Bron , J. Brostean-Kaiser , A. Burgman , R. S. Busse , T. Carver , C. Chen , E. Cheung , D. Chirkin , K. Clark , L. Classen , G. H. Collin , J. M. Conrad , P. Coppin , P. Correa , D. F. Cowen , R. Cross , P. Dave , J. P. A. M. de André , C. De Clercq , J. J. DeLaunay , H. Dembinski , K. Deoskar , S. De Ridder , P. Desiati , K. D. de Vries , G. de Wasseige , M. de With , T. DeYoung , A. Diaz , J. C. Díaz-Vélez , H. Dujmovic , M. Dunkman , E. Dvorak , B. Eberhardt , T. Ehrhardt , P. Eller , P. A. Evenson , S. Fahey , A. R. Fazely , J. Felde , K. Filimonov , C. Finley , A. Franckowiak , E. Friedman , A. Fritz , T. K. Gaisser , J. Gallagher , E. Ganster , S. Garrappa , L. Gerhardt , K. Ghorbani , T. Glauch , T. Glüsenkamp , A. Goldschmidt , J. G. Gonzalez , D. Grant , Z. Griffith , M. Günder , M. Gündüz , C. Haack , A. Hallgren , L. Halve , F. Halzen , K. Hanson , D. Hebecker , D. Heereman , K. Helbing , R. Hellauer , F. Henningsen , S. Hickford , J. Hignight , G. C. Hill , K. D. Hoffman , R. Hoffmann , T. Hoinka , B. Hokanson-Fasig , K. Hoshina , F. Huang , M. Huber , K. Hultqvist , M. Hünnefeld , R. Hussain , S. In , N. Iovine , A. Ishihara , E. Jacobi , G. S. Japaridze , M. Jeong , K. Jero , B. J. P. Jones , W. Kang , A. Kappes , D. Kappesser , T. Karg , M. Karl , A. Karle , U. Katz , M. Kauer , A. Keivani , J. L. Kelley , A. Kheirandish , J. Kim , T. Kintscher , J. Kiryluk , T. Kittler , S. R. Klein , R. Koirala , H. Kolanoski , L. Köpke , C. Kopper , S. Kopper , D. J. Koskinen , M. Kowalski , K. Krings , G. Krückl , N. Kulacz , S. Kunwar , N. Kurahashi , A. Kyriacou , M. Labare , J. L. Lanfranchi , M. J. Larson , F. Lauber , J. P. Lazar , K. Leonard , M. Leuermann , Q. R. Liu , E. Lohfink , C. J. Lozano Mariscal , L. Lu , F. Lucarelli , J. Lünemann , W. Luszczak , J. Madsen , G. Maggi , K. B. M. Mahn , Y. Makino , K. Mallot , S. Mancina , I. C. Mariş , R. Maruyama , K. Mase , R. Maunu , K. Meagher , M. Medici , A. Medina , M. Meier , S. Meighen-Berger , T. Menne , G. Merino , T. Meures , S. Miarecki , J. Micallef , G. Momenté , T. Montaruli , R. W. Moore , M. Moulai , R. Nagai , R. Nahnhauer , P. Nakarmi , U. Naumann , G. Neer , H. Niederhausen , S. C. Nowicki , D. R. Nygren , A. Obertacke Pollmann , A. Olivas , A. O'Murchadha , E. O'Sullivan , T. Palczewski , H. Pandya , D. V. Pankova , N. Park , P. Peiffer , C. Pérez de los Heros , D. Pieloth , E. Pinat , A. Pizzuto , M. Plum , P. B. Price , G. T. Przybylski , C. Raab , A. Raissi , M. Rameez , L. Rauch , K. Rawlins , I. C. Rea , R. Reimann , B. Relethford , G. Renzi , E. Resconi , W. Rhode , M. Richman , S. Robertson , M. Rongen , C. Rott , T. Ruhe , D. Ryckbosch , D. Rysewyk , I. Safa , S. E. Sanchez Herrera , A. Sandrock , J. Sandroos , M. Santander , S. Sarkar , S. Sarkar , K. Satalecka , M. Schaufel , P. Schlunder , T. Schmidt , A. Schneider , J. Schneider , L. Schumacher , S. Sclafani , D. Seckel , S. Seunarine , M. Silva , R. Snihur , J. Soedingrekso , D. Soldin , M. Song , G. M. Spiczak , C. Spiering , J. Stachurska , M. Stamatikos , T. Stanev , A. Stasik , R. Stein , J. Stettner , A. Steuer , T. Stezelberger , R. G. Stokstad , A. Stößl , N. L. Strotjohann , T. Stuttard , G. W. Sullivan , M. Sutherland , I. Taboada , F. Tenholt , S. Ter-Antonyan , A. Terliuk , S. Tilav , L. Tomankova , C. Tönnis , S. Toscano , D. Tosi , M. Tselengidou , C. F. Tung , A. Turcati , R. Turcotte , C. F. Turley , B. Ty , E. Unger , M. A. Unland Elorrieta , M. Usner , J. Vandenbroucke , W. Van Driessche , D. van Eijk , N. van Eijndhoven , S. Vanheule , J. van Santen , M. Vraeghe , C. Walck , A. Wallace , M. Wallraff , N. Wandkowsky , T. B. Watson , C. Weaver , M. J. Weiss , J. Weldert , C. Wendt , J. Werthebach , S. Westerhoff , B. J. Whelan , N. Whitehorn , K. Wiebe , C. H. Wiebusch , L. Wille , D. R. Williams , L. Wills , M. Wolf , J. Wood , T. R. Wood , K. Woschnagg , G. Wrede , D. L. Xu , X. W. Xu , Y. Xu , J. P. Yanez , G. Yodh , S. Yoshida , T. Yuan

Leptohadronic Multimessenger Modeling of 324 Gamma-Ray Blazars

The origin of the diffuse astrophysical neutrino flux observed by the IceCube experiment is still under debate. In recent years there have been associations of neutrino events with individual blazars, which are active galaxies with…

High Energy Astrophysical Phenomena · Physics 2024-03-05 Xavier Rodrigues , Vaidehi S. Paliya , Simone Garrappa , Anastasiia Omeliukh , Anna Franckowiak , Walter Winter

Observing the inner parsec-scale region of candidate neutrino-emitting blazars

Context. Many questions on the nature of astrophysical counterparts of high-energy neutrinos remain unanswered. There is increasing evidence of a connection between blazar jets and neutrino events, with the flare of the gamma-ray blazar…

High Energy Astrophysical Phenomena · Physics 2022-07-20 Cristina Nanci , Marcello Giroletti , Monica Orienti , Giulia Migliori , Javier Moldón , Simone Garrappa , Matthias Kadler , Eduardo Ros , Sara Buson , Tao An , Miguel A. Pérez-Torres , Filippo D'Ammando , Prashanth Mohan , Ivan Agudo , Bong W. Sohn , Alberto J. Castro-Tirado , Yingkang Zhang

Blazar Flares as an Origin of High-Energy Cosmic Neutrinos?

We consider implications of high-energy neutrino emission from blazar flares, including the recent event IceCube-170922A and the 2014-2015 neutrino flare that could originate from TXS 0506+056. First, we discuss their contribution to the…

High Energy Astrophysical Phenomena · Physics 2018-10-11 Kohta Murase , Foteini Oikonomou , Maria Petropoulou

TXS 0506+056-like blazar sources and their role as possible neutrino emitters

The interest in blazars as candidate neutrino emitters grew after the 3$\sigma$ evidence for a contemporaneous joint photon and neutrino emission from the flaring blazar TXS 0506+056 in 2017. Blazars, a class of extragalactic sources with…

High Energy Astrophysical Phenomena · Physics 2025-11-27 Ilaria Viale , Giacomo Principe , Chiara Righi , Matteo Cerruti , Fabrizio Tavecchio , Elisa Bernardini

Neutrinos from blazars

The evidence for joint gamma and neutrino emission from the blazar TXS 0506+056 has renewed interest in blazars as neutrino sources. The detection of neutrinos from blazars can be seen as the smoking gun for the presence of relativistic…

High Energy Astrophysical Phenomena · Physics 2020-05-20 Matteo Cerruti

On the Neutrino Flares from the Direction of TXS 0506+056

For the first time since the discovery of high-energy cosmic neutrinos by IceCube, a multimessenger campaign identified a distant gamma ray blazar, TXS 0506+056, as the source of a high-energy neutrino. The extraordinary brightness of the…

High Energy Astrophysical Phenomena · Physics 2019-04-03 Francis Halzen , Ali Kheirandish , Thomas Weisgarber , Scott P. Wakely

Search for muon-neutrino emission from GeV and TeV gamma-ray flaring blazars using five years of data of the ANTARES telescope

The ANTARES telescope is well-suited for detecting astrophysical transient neutrino sources as it can observe a full hemisphere of the sky at all times with a high duty cycle. The background due to atmospheric particles can be drastically…

High Energy Astrophysical Phenomena · Physics 2016-08-08 S. Adrián-Martínez , A. Albert , M. André , G. Anton , M. Ardid , J. -J. Aubert , B. Baret , J. Barrios-Martí , S. Basa , V. Bertin , S. Biagi , C. Bogazzi , R. Bormuth , M. Bou-Cabo , M. C. Bouwhuis , R. Bruijn , J. Brunner , J. Busto , A. Capone , L. Caramete , J. Carr , T. Chiarusi , M. Circella , R. Coniglione , H. Costantini , P. Coyle , A. Creusot , I. Dekeyser , A. Deschamps , G. De Bonis , C. Distefano , C. Donzaud , D. Dornic , D. Drouhin , A. Dumas , T. Eberl , D. Elsässer , A. Enzenhöfer , K. Fehn , I. Felis , P. Fermani , F. Folger , L. A. Fusco , S. Galatà , P. Gay , S. Geißelsöder , K. Geyer , V. Giordano , A. Gleixner , R. Gracia-Ruiz , K. Graf , H. van Haren , A. J. Heijboer , Y. Hello , J. J. Hernández-Rey , A. Herrero , J. Hößl , J. Hofestädt , C. Hugon , C. W James , M. de Jong , M. Kadler , O. Kalekin , U. Katz , D. Kießling , P. Kooijman , A. Kouchner , I. Kreykenbohm , V. Kulikovskiy , R. Lahmann , G. Lambard , D. Lattuada , D. Lefèvre , E. Leonora , S. Loucatos , S. Mangano , A. Margiotta , J. A. Martínez-Mora , S. Martini , A. Mathieu , T. Michael , P. Migliozzi , A. Moussa , C. Mueller , M. Neff , E. Nezri , G. E. Păvălaş , C. Pellegrino , C. Perrina , P. Piattelli , V. Popa , T. Pradier , C. Racca , G. Riccobene , R. Richter , K. Roensch , A. Rostovtsev , M. Saldaña , D. F. E. Samtleben , M. Sanguineti , P. Sapienza , J. Schmid , J. Schnabel , S. Schulte , F. Schüssler , T. Seitz , C. Sieger , M. Spurio , J. J. M. Steijger , Th. Stolarczyk , A. Sánchez-Losa , M. Taiuti , C. Tamburini , A. Trovato , M. Tselengidou , C. Tönnis , D. Turpin , B. Vallage , C. Vallée , V. Van Elewyck , E. Visser , D. Vivolo , S. Wagner , J. Wilms , J. D. Zornoza , J. Zúñiga

VLBI Probes of Jet Physics in Neutrino-Candidate Blazars

In recent years, evidence has accumulated that some high-energy cosmic neutrinos can be associated with blazars. The strongest evidence for an individual association was found in the case of the blazar TXS 0506+056 in 2017. In July 2019,…

High Energy Astrophysical Phenomena · Physics 2023-08-09 F. Eppel , M. Kadler , E. Ros , P. Benke , M. Giroletti , J. Hessdoerfer , F. McBride , F. Roesch

Characterizing Candidate Blazar Counterparts of the Ultra-High-Energy Event KM3-230213A

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…

High Energy Astrophysical Phenomena · Physics 2025-11-04 KM3NeT Collaboration , MessMapp Group , LAT Collaboration , m Telescope Group , SVOM Collaboration , P. Baldini , J. Buchner , A. K. Erkenov , N. Globus , A. Merloni , A. Paggi , A. V. Popkov , D. Porquet , M. Salvato , Y. V. Sotnikova , P. A. Voitsik

$Fermi$-LAT follow-up observations in seven years of real-time high-energy neutrino alerts

The realtime program for high-energy neutrino track events detected by the IceCube South Pole Neutrino Observatory releases alerts to the astronomical community with the goal of identifying electromagnetic counterparts to astrophysical…

High Energy Astrophysical Phenomena · Physics 2024-09-17 S. Garrappa , S. Buson , J. Sinapius , A. Franckowiak , I. Liodakis , C. Bartolini , M. Giroletti , C. Nanci , G. Principe , T. M. Venters

Hunting for neutrino emission from multi-frequency variable sources

Pinpointing the neutrino sources is crucial to unveil the mystery of high-energy cosmic rays. The search for neutrino-source candidates from coincident neutrino-photon signatures and electromagnetic objects with peculiar flaring behaviors…

High Energy Astrophysical Phenomena · Physics 2022-11-30 Yu-Ling Chang , Bruno Arsioli , Wenlian Li , Donglian Xu , Liang Chen

Searches for neutrinos in the direction of radio-bright blazars with the ANTARES telescope

Active galaxies, especially blazars, are among the most promising neutrino source candidates. To date, ANTARES searches for these objects considered GeV-TeV $\gamma$-ray bright blazars. Here, a statistically complete radio-bright blazar…

High Energy Astrophysical Phenomena · Physics 2024-03-13 ANTARES Collaboration , A. Albert , S. Alves , M. André , M. Ardid , S. Ardid , J. J. Aubert , J Aublin , B. Baret , S. Basa , Y. Becherini , B. Belhorma , M. Bendahman , F. Benfenati , V. Bertin , S. Biagi , M. Bissinger , J. Boumaaza , M. Bouta , M. C. Bouwhuis , H. Brânzaş , R. Bruijn , J. Brunner , J. Busto , B. Caiffi , D. Calvo , S. Campion , A. Capone , L. Caramete , F. Carenini , J. Carr , V. Carretero , S. Celli , L. Cerisy , M. Chabab , R. Cherkaoui El Moursli , T. Chiarusi , M. Circella , J. A. B. Coelho , A. Coleiro , R. Coniglione , P. Coyle , A. Creusot , A. S. M. Cruz , A. F. Díaz , B. De Martino , C. Distefano , I. Di Palma , A. Domi , C. Donzaud , D. Dornic , D. Drouhin , T. Eberl , T. van Eeden , D. van Eijk , S. El Hedri , N. El Khayati , A. Enzenhöfer , P. Fermani , G. Ferrara , F. Filippini , L. Fusco , S. Gagliardini , J. García , C. Gatius Oliver , P. Gay , N. Geißelbrecht , H. Glotin , R. Gozzini , R. Gracia Ruiz , K. Graf , C. Guidi , L. Haegel , S. Hallmann , H. van Haren , A. J. Heijboer , Y. Hello , J. J. Hernández-Rey , J. Hößl , J. Hofestädt , F. Huang , G. Illuminati , C. W. James , B. Jisse-Jung , M. de Jong , P. de Jong , M. Kadler , O. Kalekin , U. Katz , A. Kouchner , Y. A Kovalev , Y. Y Kovalev , I. Kreykenbohm , V. Kulikovskiy , R. Lahmann , M. Lamoureux , A. Lazo , D. Lefèvre , E. Leonora , G. Levi , S. Le Stum , D. Lopez-Coto , S. Loucatos , L. Maderer , J. Manczak , M. Marcelin , A. Margiotta , A. Marinelli , J. A. Martínez-Mora , P. Migliozzi , A. Moussa , R. Muller , S. Navas , E. Nezri , B. Ó Fearraigh , E. Oukacha , A. Păun , G. E. Păvălaş , S. Peña-Martínez , M. Perrin-Terrin , V. Pestel , P. Piattelli , A. Plavin , C. Poirè , V. Popa , T. Pradier , A. Pushkarev , N. Randazzo , D. Real , S. Reck , G. Riccobene , A. Romanov , A. Sánchez-Losa , A. Saina , F. Salesa Greus , D. F. E. Samtleben , M. Sanguineti , P. Sapienza , J. Schnabel , J. Schumann , F. Schüssler , J. Seneca , M. Spurio , Th. Stolarczyk , M. Taiuti , Y. Tayalati , S. J. Tingay , S. Troitsky , B. Vallage , G. Vannoye , V. Van Elewyck , S. Viola , D. Vivolo , J. Wilms , S. Zavatarelli , A. Zegarelli , J. D. Zornoza , J. Zúñiga , OVRO Collaboration , : , T. Hovatta , S. Kiehlmann , I. Liodakis , V. Pavlidou , A. C. S Readhead

Analyzing the gamma-ray activity of neutrino emitter candidates: comparing TXS 0506+056 with other blazars

On 22nd of September 2017 the IceCube collaboration sent an alert for an EHE (Extreme High Energy) event, corresponding to the reconstruction of a muonic neutrino (IC-170922A) with energy $\sim 290$ TeV. A multi-wavelength follow-up…

High Energy Astrophysical Phenomena · Physics 2021-08-18 Antonio Marinelli , J. Rodrigo Sacahui , Ankur Sharma , Mabel Osorio-Archila

Search for neutrino emission from blazar $\gamma$-ray flares accounting for possible neutrino time delays

We report the results of the search for the high-energy neutrino emission associated with blazar flares, accounting for a possible lag of neutrinos with respect to the electromagnetic emission, either due to the slowness of the proton…

High Energy Astrophysical Phenomena · Physics 2026-02-06 Egor Podlesnyi , Foteini Oikonomou

Searching for Time-Dependent Neutrino Emission from Blazars with IceCube

In 2017, IceCube detected a high energy neutrino in coincidence with the blazar TXS 0506+056. In a follow up analysis of archival data, evidence for previous neutrino emission from the blazar during 2014-15 was found. In this analysis, we…

High Energy Astrophysical Phenomena · Physics 2019-08-16 Erin O'Sullivan , Chad Finley

Study of blazars detected by Fermi-LAT as high-energy neutrino sources

Besides the neutrino source detected by IceCube, NGC 1068, the association of the IceCube-170922A neutrino with the blazar in a flaring state among several wavelengths (from radio up to high-energy (HE) gamma-rays), the site and mechanisms…

High Energy Astrophysical Phenomena · Physics 2023-08-29 Antonio Galván , Nissim Fraija , Edilberto Aguilar-Ruiz , Jose Antonio de Diego Onsurbe , Maria G. Dainotti

Modelling the coincident observation of a high-energy neutrino and a bright blazar flare

In September 2017, the IceCube Neutrino Observatory recorded a very-high-energy neutrino in directional coincidence with a blazar in an unusually bright gamma-ray state, TXS0506+056. Blazars are prominent photon sources in the universe…

High Energy Astrophysical Phenomena · Physics 2019-05-14 Shan Gao , Anatoli Fedynitch , Walter Winter , Martin Pohl

Leptohadronic blazar models applied to the 2014-15 flare of TXS 0506+056

We investigate whether the emission of neutrinos observed in 2014-15 from the direction of the blazar TXS 0506+056 can be accommodated with leptohadronic multi-wavelength models of the source commonly adopted for the 2017 flare. While…

High Energy Astrophysical Phenomena · Physics 2019-04-17 Xavier Rodrigues , Shan Gao , Anatoli Fedynitch , Andrea Palladino , Walter Winter

Flare Duty Cycle of Gamma-Ray Blazars and Implications for High-Energy Neutrino Emission

Gamma-ray flares of blazars may be accompanied by high-energy neutrinos due to interactions of high-energy cosmic rays in the jet with photons, as suggested by the detection of the high-energy neutrino IceCube-170922A during a major…

High Energy Astrophysical Phenomena · Physics 2023-09-08 Kenji Yoshida , Maria Petropoulou , Kohta Murase , Foteini Oikonomou