Related papers: Medium-scale anisotropies measured by Telescope Ar…

The Anisotropy of the Ultra-High Energy Cosmic Rays

Ultra-high energy cosmic rays (UHECRs) may originate from the decay of massive relic particles in the dark halo of the Galaxy, or they may be produced by supermassive black holes in the nuclei of nearby galaxies. The anisotropy in the…

Astrophysics · Physics 2011-02-16 Wyn Evans , Francesc Ferrer , Subir Sarkar

Propagation of ultra-high-energy cosmic rays in the magnetized cosmic web

A high concentration of ultra-high-energy cosmic ray (UHECR) events, called a hotspot, was reported by the Telescope Array (TA) experiment, but its origin still remains unsolved. One of the obstacles is that there is no astronomical object,…

High Energy Astrophysical Phenomena · Physics 2019-09-06 Jihyun Kim , Dongsu Ryu , Soonyoung Roh , Jihoon Ha , Hyesung Kang

The Ultra-High Energy Cosmic Ray Spectrum Measured by the Telescope Array's Middle Drum Detector

The Telescope Array's Middle Drum fluorescence detector was constructed using refurbished telescopes from the High Resolution Fly's Eye (HiRes) experiment. As such, there is a direct comparison between these two experiments' fluorescence…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Douglas Rodriguez , Matt Wood

ALMA ACA detection of submillimeter emission associated with the west hot spot of the radio galaxy Pictor A

In order to investigate the far-infrared excess detected from the west hot spot of the radio galaxy Pictor A with the Herschel observatory, a submillimeter photometry is performed with the Atacama Compact Array (ACA) of the Atacama Large…

High Energy Astrophysical Phenomena · Physics 2023-08-09 Naoki Isobe , Hiroshi Nagai , Motoki Kino , Shunsuke Baba , Takao Nakagawa , Yuji Sunada , Makoto Tashiro

Searches for Anisotropies in the Arrival Directions of the Highest Energy Cosmic Rays Detected by the Pierre Auger Observatory

We analyze the distribution of arrival directions of ultra-high energy cosmic rays recorded at the Pierre Auger Observatory in 10 years of operation. The data set, about three times larger than that used in earlier studies, includes arrival…

High Energy Astrophysical Phenomena · Physics 2015-12-01 Pierre Auger Collaboration

Ultra-high-energy-cosmic-ray hot spots from tidal disruption events

We consider the possibility that tidal disruption events (TDEs) caused by supermassive black holes (SMBHs) in nearby galaxies can account for the ultra-high-energy cosmic-ray (UHECR) hotspot reported recently by the Telescope Array (TA) and…

High Energy Astrophysical Phenomena · Physics 2017-01-18 Daniel N. Pfeffer , Ely D. Kovetz , Marc Kamionkowski

Results and status of the EUSO-TA detector

EUSO-TA is a ground-based telescope, located at the Black Rock Mesa site of Telescope Array (TA), Utah, USA. The main aim of the instrument is observation of Ultra High Energy Cosmic Rays through detection of ultraviolet light generated by…

High Energy Astrophysical Phenomena · Physics 2019-09-23 Lech Wiktor Piotrowski

Rare Transients in Nearby Galaxies Explain Ultra-high-energy Cosmic Rays

The origin of ultra-high-energy cosmic rays remains one of the central open questions in astroparticle physics. Recent measurements reveal anisotropies in arrival directions, a rigidity-dependent composition dominated by intermediate-mass…

High Energy Astrophysical Phenomena · Physics 2025-12-09 Imre Bartos , Marek Kowalski

Observation of Small-scale Anisotropy in the Arrival Direction Distribution of TeV Cosmic Rays with HAWC

The High-Altitude Water Cherenkov (HAWC) Observatory is sensitive to gamma rays and charged cosmic rays at TeV energies. The detector is still under construction, but data acquisition with the partially deployed detector started in 2013. An…

High Energy Astrophysical Phenomena · Physics 2014-11-14 A. U. Abeysekara , R. Alfaro , C. Alvarez , J. D. Álvarez , R. Arceo , J. C. Arteaga-Velázquez , H. A. Ayala Solares , A. S. Barber , B. M. Baughman , N. Bautista-Elivar , E. Belmont , S. Y. BenZvi , D. Berley , M. Bonilla Rosales , J. Braun , K. S. Caballero-Mora , A. Carramiñana , M. Castillo , U. Cotti , J. Cotzomi , E. de la Fuente , C. De León , T. DeYoung , R. Diaz Hernandez , J. C. Díaz-Vélez , B. L. Dingus , M. A. DuVernois , R. W. Ellsworth , D. W. Fiorino , N. Fraija , A. Galindo , F. Garfias , M. M. González , J. A. Goodman , M. Gussert , Z. Hampel-Arias , J. P. Harding , P. Hüntemeyer , C. M. Hui , A. Imran , A. Iriarte , P. Karn , D. Kieda , G. J. Kunde , A. Lara , R. J. Lauer , W. H. Lee , D. Lennarz , H. León Vargas , J. T. Linnemann , M. Longo , R. Luna-García , K. Malone , A. Marinelli , S. S. Marinelli , H. Martinez , O. Martinez , J. Martínez-Castro , J. A. J. Matthews , J. McEnery , E. Mendoza Torres , P. Miranda-Romagnoli , E. Moreno , M. Mostafá , L. Nellen , M. Newbold , R. Noriega-Papaqui , T. Oceguera-Becerra , B. Patricelli , R. Pelayo , E. G. Pérez-Pérez , J. Pretz , C. Rivière , D. Rosa-González , E. Ruiz-Velasco , J. Ryan , H. Salazar , F. Salesa Greus , A. Sandoval , M. Schneider , G. Sinnis , A. J. Smith , K. Sparks Woodle , R. W. Springer , I. Taboada , P. A. Toale , K. Tollefson , I. Torres , T. N. Ukwatta , L. Villaseñor , T. Weisgarber , S. Westerhoff , I. G. Wisher , J. Wood , G. B. Yodh , P. W. Younk , D. Zaborov , A. Zepeda , H. Zhou

Global anisotropy of arrival directions of ultra-high-energy cosmic rays: capabilities of space-based detectors

Planned space-based ultra-high-energy cosmic-ray detectors (TUS, JEM-EUSO and S-EUSO) are best suited for searches of global anisotropies in the distribution of arrival directions of cosmic-ray particles because they will be able to observe…

Astrophysics · Physics 2014-11-18 O. E. Kalashev , B. A. Khrenov , P. Klimov , S. Sharakin , S. V. Troitsky

Study of the upgraded EUSO-TA performance via simulations

The EUSO-TA ground-based fluorescence detector of the JEM-EUSO program, which operates at the Telescope Array (TA) site in Utah (USA), is being upgraded. In the previous data acquisition campaigns, it detected the first nine ultra-high…

Instrumentation and Methods for Astrophysics · Physics 2023-09-22 Francesca Bisconti

Observation of Anisotropy in the Arrival Directions of Galactic Cosmic Rays at Multiple Angular Scales with IceCube

Between May 2009 and May 2010, the IceCube neutrino detector at the South Pole recorded 32 billion muons generated in air showers produced by cosmic rays with a median energy of 20 TeV. With a data set of this size, it is possible to probe…

High Energy Astrophysical Phenomena · Physics 2011-09-22 IceCube Collaboration , R. Abbasi , Y. Abdou , T. Abu-Zayyad , J. Adams , J. A. Aguilar , M. Ahlers , D. Altmann , K. Andeen , J. Auffenberg , X. Bai , M. Baker , S. W. Barwick , R. Bay , J. L. Bazo Alba , K. Beattie , J. J. Beatty , S. Bechet , J. K. Becker , K. -H. Becker , M. L. Benabderrahmane , S. BenZvi , J. Berdermann , P. Berghaus , D. Berley , E. Bernardini , D. Bertrand , D. Z. Besson , D. Bindig , M. Bissok , E. Blaufuss , J. Blumenthal , D. J. Boersma , C. Bohm , D. Bose , S. Böser , O. Botner , A. M. Brown , S. Buitink , K. S. Caballero-Mora , M. Carson , D. Chirkin , B. Christy , J. Clem , F. Clevermann , S. Cohen , C. Colnard , D. F. Cowen , M. V. D'Agostino , M. Danninger , J. Daughhetee , J. C. Davis , C. De Clercq , L. Demirörs , T. Denger , O. Depaepe , F. Descamps , P. Desiati , G. de Vries-Uiterweerd , T. DeYoung , J. C. Díaz-Vélez , M. Dierckxsens , J. Dreyer , J. P. Dumm , R. Ehrlich , J. Eisch , R. W. Ellsworth , O. Engdegård , S. Euler , P. A. Evenson , O. Fadiran , A. R. Fazely , A. Fedynitch , J. Feintzeig , T. Feusels , K. Filimonov , C. Finley , T. Fischer-Wasels , M. M. Foerster , B. D. Fox , A. Franckowiak , R. Franke , T. K. Gaisser , J. Gallagher , L. Gerhardt , L. Gladstone , T. Glüsenkamp , A. Goldschmidt , J. A. Goodman , D. Gora , D. Grant , T. Griesel , A. Groß , S. Grullon , M. Gurtner , C. Ha , A. Hajismail , A. Hallgren , F. Halzen , K. Han , K. Hanson , D. Heinen , K. Helbing , P. Herquet , S. Hickford , G. C. Hill , K. D. Hoffman , A. Homeier , K. Hoshina , D. Hubert , W. Huelsnitz , J. -P. Hülß , P. O. Hulth , K. Hultqvist , S. Hussain , A. Ishihara , J. Jacobsen , G. S. Japaridze , H. Johansson , J. M. Joseph , K. -H. Kampert , A. Kappes , T. Karg , A. Karle , P. Kenny , J. Kiryluk , F. Kislat , S. R. Klein , J. -H. Köhne , G. Kohnen , H. Kolanoski , L. Köpke , S. Kopper , D. J. Koskinen , M. Kowalski , T. Kowarik , M. Krasberg , T. Krings , G. Kroll , N. Kurahashi , T. Kuwabara , M. Labare , S. Lafebre , K. Laihem , H. Landsman , M. J. Larson , R. Lauer , J. Lünemann , B. Madajczyk , J. Madsen , P. Majumdar , A. Marotta , R. Maruyama , K. Mase , H. S. Matis , K. Meagher , M. Merck , P. Mészáros , T. Meures , E. Middell , N. Milke , J. Miller , T. Montaruli , R. Morse , S. M. Movit , R. Nahnhauer , J. W. Nam , U. Naumann , P. Nießen , D. R. Nygren , S. Odrowski , A. Olivas , M. Olivo , A. O'Murchadha , M. Ono , S. Panknin , L. Paul , C. Pérez de los Heros , J. Petrovic , A. Piegsa , D. Pieloth , R. Porrata , J. Posselt , C. C. Price , P. B. Price , G. T. Przybylski , K. Rawlins , P. Redl , E. Resconi , W. Rhode , M. Ribordy , A. Rizzo , J. P. Rodrigues , P. Roth , F. Rothmaier , C. Rott , T. Ruhe , D. Rutledge , B. Ruzybayev , D. Ryckbosch , H. -G. Sander , M. Santander , S. Sarkar , K. Schatto , T. Schmidt , A. Schönwald , A. Schukraft , A. Schultes , O. Schulz , M. Schunck , D. Seckel , B. Semburg , S. H. Seo , Y. Sestayo , S. Seunarine , A. Silvestri , A. Slipak , G. M. Spiczak , C. Spiering , M. Stamatikos , T. Stanev , G. Stephens , T. Stezelberger , R. G. Stokstad , A. Stössl , S. Stoyanov , E. A. Strahler , T. Straszheim , M. Stür , G. W. Sullivan , Q. Swillens , H. Taavola , I. Taboada , A. Tamburro , A. Tepe , S. Ter-Antonyan , S. Tilav , P. A. Toale , S. Toscano , D. Tosi , D. Turčan , N. van Eijndhoven , J. Vandenbroucke , A. Van Overloop , J. van Santen , M. Vehring , M. Voge , C. Walck , T. Waldenmaier , M. Wallraff , M. Walter , Ch. Weaver , C. Wendt , S. Westerhoff , N. Whitehorn , K. Wiebe , C. H. Wiebusch , D. R. Williams , R. Wischnewski , H. Wissing , M. Wolf , T. R. Wood , K. Woschnagg , C. Xu , X. W. Xu , G. Yodh , S. Yoshida , P. Zarzhitsky , M. Zoll

Prospects of detecting a large-scale anisotropy of ultra-high-energy cosmic rays from a nearby source with the K-EUSO orbital telescope

KLYPVE-EUSO (K-EUSO) is a planned orbital detector of ultra-high-energy cosmic rays (UHECRs), which is to be deployed on board the International Space Station. K-EUSO is expected to have a uniform exposure over the celestial sphere and…

High Energy Astrophysical Phenomena · Physics 2019-09-25 O. Kalashev , M. Pshirkov , M. Zotov

Analysis of Downward Terrestrial Gamma-ray Flashes Using a Large-Area Cosmic Ray Scintillation Detector

The Telescope Array (TA) of central Utah was designed to detect ultra-high-energy cosmic rays (UHECRs) and is the largest of its kind in the Northern hemisphere. Its capabilities, however, are not limited to extra-terrestrial sources.…

High Energy Astrophysical Phenomena · Physics 2023-08-11 Jackson Remington

Analysis of the Arrival Directions of Ultrahigh Energy Cosmic Rays

The arrival directions of ultrahigh energy extensive air showers (EAS) by Yakutsk, AGASA and SUGAR array data are considered. For the first time, the maps of equal exposition of celestial sphere for the distribution of particles by AGASA…

Astrophysics · Physics 2011-11-09 A. A. Mikhailov

Ultra High Energy Cosmic Rays

Ultra high energy particles arrive at Earth constantly. They provide a beam at energies higher than any man-made accelerator, but at a very low rate. Two large experiments, the Pierre Auger Observatory and the Telescope Array experiment,…

High Energy Astrophysical Phenomena · Physics 2011-11-14 Miguel Mostafa

Design, Construction and Operation of a Low-Power, Autonomous Radio-Frequency Data-Acquisition Station for the TARA Experiment

Employing a 40-kW radio-frequency transmitter just west of Delta, UT, and operating at 54.1 MHz, the TARA (Telescope Array RAdar) experiment seeks radar detection of extensive air showers (EAS) initiated by ultra-high energy cosmic rays…

Instrumentation and Methods for Astrophysics · Physics 2015-12-09 S. Kunwar , R. Abbasi , C. Allen , J. Belz , D. Besson , M. Byrne , B. Farhang-Boroujeny , W. H. Gillman , W. Hanlon , J. Hanson , I. Myers , A. Novikov , S. Prohira , K. Ratzlaff , A. Rezazadeh , V. Sanivarapu , D. Schurig , A. Shustov , M. Smirnova , H. Takai , G. B. Thomson , R. Young

Anisotropies of Cosmic Rays and Search for Intergalactic Cascades from the direction of the Highest Energetic Cosmic Ray Events with the HEGRA Scintillator Array

Data taken with the HEGRA Scintillator Array have been used to search for spatial anisotropies in the arrival directions of cosmic rays above 20 TeV. In this paper results on the search for TeV gamma-ray emission from the Galactic plane and…

Astrophysics · Physics 2007-05-23 D. Horns , D. Schmele

Anisotropy in Cosmic-Ray Arrival Directions in the Southern Hemisphere with Six Years of Data from the IceCube Detector

The IceCube Neutrino Observatory has accumulated a total of 318 billion cosmic-ray induced muon events between May 2009 and May 2015. This data set was used for a detailed analysis of the cosmic-ray arrival direction anisotropy in the TeV…

High Energy Astrophysical Phenomena · Physics 2016-08-09 IceCube Collaboration , M. G. Aartsen , K. Abraham , M. Ackermann , J. Adams , J. A. Aguilar , M. Ahlers , M. Ahrens , D. Altmann , T. Anderson , I. Ansseau , G. Anton , M. Archinger , C. Arguelles , T. C. Arlen , J. Auffenberg , X. Bai , S. W. Barwick , V. Baum , R. Bay , J. J. Beatty , J. Becker Tjus , K. -H. Becker , E. Beiser , S. BenZvi , P. Berghaus , D. Berley , E. Bernardini , A. Bernhard , D. Z. Besson , G. Binder , D. Bindig , M. Bissok , E. Blaufuss , J. Blumenthal , D. J. Boersma , C. Bohm , M. Börner , F. Bos , D. Bose , S. Böser , O. Botner , J. Braun , L. Brayeur , H. -P. Bretz , N. Buzinsky , J. Casey , M. Casier , E. Cheung , D. Chirkin , A. Christov , K. Clark , L. Classen , S. Coenders , G. H. Collin , J. M. Conrad , D. F. Cowen , A. H. Cruz Silva , J. Daughhetee , J. C. Davis , M. Day , J. P. A. M. de André , C. De Clercq , E. del Pino Rosendo , H. Dembinski , S. De Ridder , P. Desiati , K. D. de Vries , G. de Wasseige , M. de With , T. DeYoung , J. C. Díaz-Vélez , V. di Lorenzo , H. Dujmovic , J. P. Dumm , M. Dunkman , B. Eberhardt , T. Ehrhardt , B. Eichmann , S. Euler , P. A. Evenson , S. Fahey , A. R. Fazely , J. Feintzeig , J. Felde , K. Filimonov , C. Finley , S. Flis , C. -C. Fösig , T. Fuchs , T. K. Gaisser , R. Gaior , J. Gallagher , L. Gerhardt , K. Ghorbani , D. Gier , L. Gladstone , M. Glagla , T. Glüsenkamp , A. Goldschmidt , G. Golup , J. G. Gonzalez , D. Góra , D. Grant , Z. Griffith , C. Ha , C. Haack , A. Haj Ismail , A. Hallgren , F. Halzen , E. Hansen , B. Hansmann , T. Hansmann , K. Hanson , D. Hebecker , D. Heereman , K. Helbing , R. Hellauer , S. Hickford , J. Hignight , G. C. Hill , K. D. Hoffman , R. Hoffmann , K. Holzapfel , A. Homeier , K. Hoshina , F. Huang , M. Huber , W. Huelsnitz , P. O. Hulth , K. Hultqvist , S. In , A. Ishihara , E. Jacobi , G. S. Japaridze , M. Jeong , K. Jero , B. J. P. Jones , M. Jurkovic , A. Kappes , T. Karg , A. Karle , U. Katz , M. Kauer , A. Keivani , J. L. Kelley , J. Kemp , A. Kheirandish , M. Kim , T. Kintscher , J. Kiryluk , S. R. Klein , G. Kohnen , R. Koirala , H. Kolanoski , R. Konietz , L. Köpke , C. Kopper , S. Kopper , D. J. Koskinen , M. Kowalski , K. Krings , G. Kroll , M. Kroll , G. Krückl , J. Kunnen , S. Kunwar , N. Kurahashi , T. Kuwabara , M. Labare , J. L. Lanfranchi , M. J. Larson , D. Lennarz , M. Lesiak-Bzdak , M. Leuermann , J. Leuner , L. Lu , J. Lünemann , J. Madsen , G. Maggi , K. B. M. Mahn , M. Mandelartz , R. Maruyama , K. Mase , H. S. Matis , R. Maunu , F. McNally , K. Meagher , M. Medici , M. Meier , A. Meli , T. Menne , G. Merino , T. Meures , S. Miarecki , E. Middell , L. Mohrmann , T. Montaruli , R. Morse , R. Nahnhauer , U. Naumann , G. Neer , H. Niederhausen , S. C. Nowicki , D. R. Nygren , A. Obertacke Pollmann , A. Olivas , A. Omairat , A. O'Murchadha , T. Palczewski , H. Pandya , D. V. Pankova , L. Paul , J. A. Pepper , C. Pérez de los Heros , C. Pfendner , D. Pieloth , E. Pinat , J. Posselt , P. B. Price , G. T. Przybylski , M. Quinnan , C. Raab , L. Rädel , M. Rameez , K. Rawlins , R. Reimann , M. Relich , E. Resconi , W. Rhode , M. Richman , S. Richter , B. Riedel , S. Robertson , M. Rongen , C. Rott , T. Ruhe , D. Ryckbosch , L. Sabbatini , H. -G. Sander , A. Sandrock , J. Sandroos , S. Sarkar , K. Schatto , M. Schimp , P. Schlunder , T. Schmidt , S. Schoenen , S. Schöneberg , A. Schönwald , L. Schumacher , D. Seckel , S. Seunarine , D. Soldin , M. Song , G. M. Spiczak , C. Spiering , M. Stahlberg , M. Stamatikos , T. Stanev , A. Stasik , A. Steuer , T. Stezelberger , R. G. Stokstad , A. Stößl , R. Ström , N. L. Strotjohann , G. W. Sullivan , M. Sutherland , H. Taavola , I. Taboada , J. Tatar , S. Ter-Antonyan , A. Terliuk , G. Tešić , S. Tilav , P. A. Toale , M. N. Tobin , S. Toscano , D. Tosi , M. Tselengidou , A. Turcati , E. Unger , M. Usner , S. Vallecorsa , J. Vandenbroucke , N. van Eijndhoven , S. Vanheule , J. van Santen , J. Veenkamp , M. Vehring , M. Voge , M. Vraeghe , C. Walck , A. Wallace , M. Wallraff , N. Wandkowsky , Ch. Weaver , C. Wendt , S. Westerhoff , B. J. Whelan , K. Wiebe , C. H. Wiebusch , L. Wille , D. R. Williams , L. Wills , H. Wissing , M. Wolf , T. R. Wood , K. Woschnagg , D. L. Xu , X. W. Xu , Y. Xu , J. P. Yanez , G. Yodh , S. Yoshida , M. Zoll

Distortion of the ultrahigh energy cosmic ray flux from rare transient sources in inhomogeneous extragalactic magnetic fields

Detecting and characterizing the anisotropy pattern of the arrival directions of the highest energy cosmic rays are crucial steps towards the identification of their sources. We discuss a possible distortion of the cosmic ray flux induced…

High Energy Astrophysical Phenomena · Physics 2015-05-27 Sihem Kalli , Martin Lemoine , Kumiko Kotera