Related papers: CANGAROO-III search for TeV Gamma-rays from two cl…

TeV Gamma-Ray Observations of the Perseus and Abell 2029 Galaxy Clusters

Galaxy clusters might be sources of TeV gamma rays emitted by high-energy protons and electrons accelerated by large scale structure formation shocks, galactic winds, or active galactic nuclei. Furthermore, gamma rays may be produced in…

Astrophysics · Physics 2008-11-26 J. S. Perkins , H. M. Badran , G. Blaylock , S. M. Bradbury , P. Cogan , Y. C. K. Chow , W. Cui , M. K. Daniel , A. D. Falcone , S. J. Fegan , J. P. Finley , P. Fortin , L. F. Fortson , G. H. Gillanders , K. J. Gutierrez , J. Grube , J. Hall , D. Hanna , J. Holder , D. Horan , S. B. Hughes , G. E. Kenny , M. Kertzman , D. B. Kieda , J. Kildea , K. Kosack , H. Krawczynski , F. Krennrich , M. J. Lang , S. LeBohec , G. Maier , P. Moriarty , R. A. Ong , M. Pohl , K. Ragan , P. F. Rebillot , G. H. Sembroski , D. Steele , S. P. Swordy , L. Valcarcel , V. V. Vassiliev , S. P. Wakely , T. C. Weekes , D. A. Williams

A statistical detection of gamma-ray emission from galaxy clusters: implications for the gamma-ray background and structure formation

The origin of the diffuse extragalactic, high-energy gamma-ray background (EGRB) filling the Universe remains unknown. The spectrum of this extragalactic radiation, as measured by the EGRET on-board CGRO, is well-fit by a power law across…

Astrophysics · Physics 2009-11-07 Caleb A. Scharf , Reshmi Mukherjee

Constraining the Cosmic-ray Energy Based on Observations of Nearby Galaxy Clusters by LHAASO

Galaxy clusters act as reservoirs of high-energy cosmic rays (CRs). As CRs propagate through the intracluster medium, they generate diffuse $\gamma$-rays detectable by arrays such as LHAASO. These $\gamma$-rays result from proton-proton…

High Energy Astrophysical Phenomena · Physics 2026-01-07 The LHAASO Collaboration , Zhen Cao , F. Aharonian , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , W. Bian , J. Blunier , A. V. Bukevich , C. M. Cai , Y. Y. Cai , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , E. S. Chen , G. H. Chen , H. K. Chen , L. F. Chen , Liang Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. B. Chen , X. J. Chen , X. P. Chen , Y. Chen , N. Cheng , Q. Y. Cheng , Y. D. Cheng , M. Y. Cui , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , Y. X. Diao , A. J. Dong , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , J. H. Fang , K. Fang , C. F. Feng , H. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. Feng , Y. L. Feng , S. Gabici , B. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , T. T. Ge , L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , J. Guo , K. J. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , R. P. Han , O. A. Hannuksela , M. Hasan , H. H. He , H. N. He , J. Y. He , X. Y. He , Y. He , S. Hernández-Cadena , B. W. Hou , C. Hou , X. Hou , H. B. Hu , S. C. Hu , C. Huang , D. H. Huang , J. J. Huang , X. L. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Y. Y. Huang , A. Inventar , X. L. Ji , H. Y. Jia , K. Jia , H. B. Jiang , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , S. Kaci , M. M. Kang , I. Karpikov , D. Khangulyan , D. Kuleshov , K. Kurinov , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , Jian Li , Jie Li , K. Li , L. Li , R. L. Li , S. D. Li , T. Y. Li , W. L. Li , X. R. Li , Xin Li , Y. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , D. B. Liu , H. Liu , J. Liu , J. L. Liu , J. R. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , X. Liu , Y. Liu , Y. Liu , Y. N. Liu , Y. Q. Lou , Q. Luo , Y. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , I. O. Maliy , J. R. Mao , Z. Min , W. Mitthumsiri , Y. Mizuno , G. B. Mou , A. Neronov , K. C. Y. Ng , M. Y. Ni , L. Nie , L. J. Ou , Z. W. Ou , P. Pattarakijwanich , Z. Y. Pei , D. Y. Peng , J. C. Qi , M. Y. Qi , J. J. Qin , D. Qu , A. Raza , C. Y. Ren , D. Ruffolo , A. Sáiz , D. Savchenko , D. Semikoz , L. Shao , O. Shchegolev , Y. Z. Shen , X. D. Sheng , Z. D. Shi , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , D. X. Sun , H. Sun , J. X. Sun , Q. N. Sun , X. N. Sun , Z. B. Sun , N. H. Tabasam , J. Takata , P. H. T. Tam , H. B. Tan , Q. W. Tang , R. Tang , Z. B. Tang , W. W. Tian , C. N. Tong , L. H. Wan , C. Wang , D. H. Wang , G. W. Wang , H. G. Wang , J. C. Wang , K. Wang , Kai Wang , Kai Wang , L. P. Wang , L. Y. Wang , L. Y. Wang , R. Wang , W. Wang , X. G. Wang , X. J. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Z. H. Wang , Z. X. Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , S. S. Weng , C. Y. Wu , H. R. Wu , Q. W. Wu , S. Wu , X. F. Wu , Y. S. Wu , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , Y. F. Xiao , Y. L. Xin , H. D. Xing , Y. Xing , D. R. Xiong , B. N. Xu , C. Y. Xu , D. L. Xu , R. F. Xu , R. X. Xu , S. S. Xu , W. L. Xu , L. Xue , D. H. Yan , T. Yan , C. W. Yang , C. Y. Yang , F. F. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , W. X. Yang , Z. H. Yang , Z. G. Yao , X. A. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , X. T. Zeng , M. Zha , B. B. Zhang , B. T. Zhang , C. Zhang , H. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , J. Y. Zhang , Li Zhang , P. F. Zhang , R. Zhang , S. R. Zhang , S. S. Zhang , S. Y. Zhang , W. Zhang , W. Y. Zhang , X. Zhang , X. P. Zhang , Yi Zhang , Yong Zhang , Z. P. Zhang , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , X. H. Zhao , Z. H. Zhao , F. Zheng , T. C. Zheng , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , X. X. Zhou , B. Y. Zhu , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , Y. C. Zou , X. Zuo

Search for GeV gamma-ray emission from clusters of galaxies studied by TeV telescopes

A cluster of galaxies is a huge system bounded by gravitation, and cosmic rays are thought to be confined in the system, thus it should contain much non-thermal components. Many theories predict significant gamma-ray emission that could be…

High Energy Astrophysical Phenomena · Physics 2009-12-18 Masaki Mori

CANGAROO-III Search for Gamma Rays from Centaurus A and the $\omega$ Centauri Region

We have observed the giant radio galaxy Centaurus A and the globular cluster $\omega$ Centauri in the TeV energy region using the CANGAROO-III stereoscopic system. The system has been in operation since 2004 withan array of four Imaging…

Astrophysics · Physics 2009-11-13 S. Kabuki , R. Enomoto , CANGAROO-III collaboration

Detection of Sub-TeV Gamma-Rays from the Galactic Center Direction by CANGAROO-II

We have detected sub-TeV gamma-ray emission from the direction of the Galactic Center (GC) using the CANGAROO-II Imaging Atmospheric Cherenkov Telescope (IACT). We detected a statistically signicant excess at energies greater than 250GeV.…

Astrophysics · Physics 2014-10-13 K. Tsuchiya , R. Enomoto , L. T. Ksenofontov , M. Mori , T. Naito , CANGAROO-II collaboration

Constraining Cosmic Rays and Magnetic Fields in the Perseus Galaxy Cluster with TeV observations by the MAGIC telescopes

Galaxy clusters are being assembled today in the most energetic phase of hierarchical structure formation which manifests itself in powerful shocks that contribute to a substantial energy density of cosmic rays (CRs). Hence, clusters are…

High Energy Astrophysical Phenomena · Physics 2012-05-11 MAGIC Collaboration , J. Aleksić , E. A. Alvarez , L. A. Antonelli , P. Antoranz , M. Asensio , M. Backes , U. Barres de Almeida , J. A. Barrio , D. Bastieri , J. Becerra González , W. Bednarek , A. Berdyugin , K. Berger , E. Bernardini , A. Biland , O. Blanch , R. K. Bock , A. Boller , G. Bonnoli , D. Borla Tridon , I. Braun , T. Bretz , A. Cañellas , E. Carmona , A. Carosi , P. Colin , E. Colombo , J. L. Contreras , J. Cortina , L. Cossio , S. Covino , F. Dazzi , A. De Angelis , G. De Caneva , E. De Cea del Pozo , B. De Lotto , C. Delgado Mendez , A. Diago Ortega , M. Doert , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , D. Eisenacher , D. Elsaesser , D. Ferenc , M. V. Fonseca , L. Font , C. Fruck , R. J. García López , M. Garczarczyk , D. Garrido , G. Giavitto , N. Godinović , S. R. Gozzini , D. Hadasch , D. Häfner , A. Herrero , D. Hildebrand , D. Höhne-Mönch , J. Hose , D. Hrupec , T. Jogler , H. Kellermann , S. Klepser , T. Krähenbühl , J. Krause , J. Kushida , A. La Barbera , D. Lelas , E. Leonardo , N. Lewandowska , E. Lindfors , S. Lombardi , M. López , R. López-Coto , A. López-Oramas , E. Lorenz , M. Makariev , G. Maneva , N. Mankuzhiyil , K. Mannheim , L. Maraschi , M. Mariotti , M. Martínez , D. Mazin , M. Meucci , J. M. Miranda , R. Mirzoyan , J. Moldón , A. Moralejo , P. Munar-Adrover , A. Niedzwiecki , D. Nieto , K. Nilsson , N. Nowak , R. Orito , S. Paiano , D. Paneque , R. Paoletti , S. Pardo , J. M. Paredes , S. Partini , M. A. Perez-Torres , M. Persic , L. Peruzzo , M. Pilia , J. Pochon , F. Prada , P. G. Prada Moroni , E. Prandini , I. Puerto Gimenez , I. Puljak , I. Reichardt , R. Reinthal , W. Rhode , M. Ribó , J. Rico , S. Rügamer , A. Saggion , K. Saito , T. Y. Saito , M. Salvati , K. Satalecka , V. Scalzotto , V. Scapin , C. Schultz , T. Schweizer , M. Shayduk , S. N. Shore , A. Sillanpää , J. Sitarek , I. Snidaric , D. Sobczynska , F. Spanier , S. Spiro , V. Stamatescu , A. Stamerra , B. Steinke , J. Storz , N. Strah , S. Sun , T. Surić , L. Takalo , H. Takami , F. Tavecchio , P. Temnikov , T. Terzić , D. Tescaro , M. Teshima , O. Tibolla , D. F. Torres , A. Treves , M. Uellenbeck , H. Vankov , P. Vogler , R. M. Wagner , Q. Weitzel , V. Zabalza , F. Zandanel , R. Zanin , C. Pfrommer , A. Pinzke

Erratum: Detection of diffuse TeV gamma-ray emission from the nearby starburst galaxy NGC 253

The CANGAROO-II telescope observed sub-TeV gamma-ray emission from the nearby starburst galaxy NGC 253. The emission region was extended with a radial size of 0.3-0.6 degree. On the contrary, H.E.S.S could not confirm this emission and gave…

Astrophysics · Physics 2008-11-26 C. Itoh , R. Enomoto , S. Yanagita , T. Yoshida

Search for cosmic-ray induced gamma-ray emission in Galaxy Clusters

Current theories predict relativistic hadronic particle populations in clusters of galaxies in addition to the already observed relativistic leptons. In these scenarios hadronic interactions give rise to neutral pions which decay into…

High Energy Astrophysical Phenomena · Physics 2014-05-06 M. Ackermann , M. Ajello , A. Albert , A. Allafort , W. B. Atwood , L. Baldini , J. Ballet , G. Barbiellini , D. Bastieri , K. Bechtol , R. Bellazzini , E. D. Bloom , E. Bonamente , E. Bottacini , T. J. Brandt , J. Bregeon , M. Brigida , P. Bruel , R. Buehler , S. Buson , G. A. Caliandro , R. A. Cameron , P. A. Caraveo , E. Cavazzuti , R. C. G. Chaves , J. Chiang , G. Chiaro , S. Ciprini , R. Claus , J. Cohen-Tanugi , J. Conrad , F. D'Ammando , A. de Angelis , F. de Palma , C. D. Dermer , S. W. Digel , P. S. Drell , A. Drlica-Wagner , C. Favuzzi , A. Franckowiak , S. Funk , P. Fusco , F. Gargano , D. Gasparrini , S. Germani , N. Giglietto , F. Giordano , M. Giroletti , G. Godfrey , G. A. Gomez-Vargas , I. A. Grenier , S. Guiriec , M. Gustafsson , D. Hadasch , M. Hayashida , J. Hewitt , R. E. Hughes , T. E. Jeltema , G. Jóhannesson , A. S. Johnson , T. Kamae , J. Kataoka , J. Knödlseder , M. Kuss , J. Lande , S. Larsson , L. Latronico , M. Llena Garde , F. Longo , F. Loparco , M. N. Lovellette , P. Lubrano , M. Mayer , M. N. Mazziotta , J. E. McEnery , P. F. Michelson , W. Mitthumsiri , T. Mizuno , M. E. Monzani , A. Morselli , I. V. Moskalenko , S. Murgia , R. Nemmen , E. Nuss , T. Ohsugi , M. Orienti , E. Orlando , J. F. Ormes , J. S. Perkins , M. Pesce-Rollins , F. Piron , G. Pivato , S. Rainò , R. Rando , M. Razzano , S. Razzaque , A. Reimer , O. Reimer , J. Ruan , M. Sánchez-Conde , A. Schulz , C. Sgrò , E. J. Siskind , G. Spandre , P. Spinelli , E. Storm , A. W. Strong , D. J. Suson , H. Takahashi , J. G. Thayer , J. B. Thayer , D. J. Thompson , L. Tibaldo , M. Tinivella , D. F. Torres , E. Troja , Y. Uchiyama , T. L. Usher , J. Vandenbroucke , G. Vianello , V. Vitale , B. L. Winer , K. S. Wood , S. Zimmer , C. Pfrommer , A. Pinzke

EGRET upper limits on the high-energy gamma-ray emission of galaxy clusters

We report EGRET upper limits on the high-energy gamma-ray emission from clusters of galaxies. EGRET observations between 1991 and 2000 were analyzed at positions of 58 individual clusters from a flux-limited sample of nearby X-ray bright…

Astrophysics · Physics 2008-11-26 O. Reimer , M. Pohl , P. Sreekumar , J. R. Mattox

First gamma-rays from galaxy clusters. Preliminary evidence of the association of galaxy clusters with EGRET unidentified gamma-ray sources

The vast majority of the celestial gamma-ray sources detected so far have not yet been identified with secure counterparts at other wavelenghts. Here we report the preliminary evidence of a probable association between galaxy clusters and…

Astrophysics · Physics 2009-11-07 Sergio Colafrancesco

Detectability of ultrahigh energy cosmic ray signatures in gamma rays

The injection of ultra-high energy cosmic rays in the intergalactic medium leads to the production of a GeV-TeV gamma-ray halo centered on the source location, through the production of a high electromagnetic component in the interactions…

High Energy Astrophysical Phenomena · Physics 2015-05-20 Kumiko Kotera , Denis Allard , Martin Lemoine

Searches for very high energy gamma rays from blazars with CANGAROO-III telescope in 2005-2009

We have searched for very high energy (VHE) gamma rays from four blazars using the CANGAROO-III imaging atmospheric Cherenkov telescope. We report the results of the observations of H 2356-309, PKS 2155-304, PKS 0537-441, and 3C 279,…

High Energy Astrophysical Phenomena · Physics 2012-02-21 Y. Mizumura , J. Kushida , K. Nishijima , G. V. Bicknell , R. W. Clay , P. G. Edwards , S. Gunji , S. Hara , S. Hayashi , S. Kabuki , F. Kajino , A. Kawachi , T. Kifune , R. Kiuchi , K. Kodani , Y. Matsubara , T. Mizukami , Y. Mizumoto , M. Mori , H. Muraishi , T. Naito , M. Ohishi , V. Stamatescu , D. L. Swaby , T. Tanimori , G. Thornton , F. Tokanai , T. Toyama , S. Yanagita , T. Yoshida , T. Yoshikoshi

CANGAROO-III Search for Gamma Rays from SN 1987A and the Surrounding Field

Optical images of SN 1987A show a triple ring structure. The inner (dust) ring has recently increased in brightness and in the number of hot spots suggesting that the supernova shock wave has collided with the dense pre-existing…

Astrophysics · Physics 2010-11-11 R. Enomoto

Neutrinos and Gamma Rays from Galaxy Clusters

The next generation of neutrino and gamma-ray detectors should provide new insights into the creation and propagation of high-energy protons within galaxy clusters, probing both the particle physics of cosmic rays interacting with the…

Astrophysics · Physics 2016-02-03 Brandon Wolfe , Fulvio Melia , Roland M. Crocker , Raymond R. Volkas

Very high energy gamma-ray observations of the galaxy clusters Abell 496 and Abell 85 with H.E.S.S

Aims: The nearby galaxy clusters Abell 496 and Abell 85 are studied in the very high energy (VHE, E > 100 GeV) band to investigate VHE cosmic rays (CRs) in this class of objects which are the largest gravitationally bound systems in the…

Astrophysics · Physics 2015-05-13 H. E. S. S. Collaboration , : , F. Aharonian

CANGAROO-III Observation of TeV Gamma Rays from the vicinity of PSR B1 706-44

Observation by the CANGAROO-III stereoscopic system of the Imaging Cherenkov Telescope has detected extended emission of TeV gamma rays in the vicinity of the pulsar PSR B1706$-$44. The strength of the signal observed as gamma-ray-like…

High Energy Astrophysical Phenomena · Physics 2015-05-13 R. Enomoto , J. Kushida , T. Nakamori , T. Kifune , G. V. Bicknell , R. W. Clay , P. G. Edwards , S. Gunji , S. Hara , T. Hara , T. Hattori , S. Hayashi , Y. Higashi , Y. Hirai , K. Inoue , H. Ishioka , S. Kabuki , F. Kajino , H. Katagiri , A. Kawachi , R. Kiuchi , H. Kubo , T. Kunisawa , T. Matoba , Y. Matsubara , I. Matsuzawa , T. Mizukami , Y. Mizumura , Y. Mizumoto , M. Mori , H. Muraishi , T. Naito , S. Nakano , K. Nishijima , M. Ohishi , Y. Otake , S. Ryoki , K. Saito , Y. Sakamoto , A. Seki , V. Stamatescu , T. Suzuki , D. L. Swaby , T. Tanimori , G. Thornton , F. Tokanai , K. Tsuchiya , S. Watanabe , E. Yamazaki , S. Yanagita , T. Yoshida , T. Yoshikoshi , Y. Yukawa

A Search for sub-TeV Gamma-rays from the Vela Pulsar Region with CANGAROO-III

We made stereoscopic observations of the Vela Pulsar region with two of the 10 m diameter CANGAROO-III imaging atmospheric Cherenkov telescopes in January and February, 2004, in a search for sub-TeV gamma-rays from the pulsar and…

Astrophysics · Physics 2009-11-13 R. Enomoto , K. Tsuchiya , Y. Adachi , S. Kabuki , P. G. Edwards

New results from H.E.S.S. observations of galaxy clusters

Clusters of galaxies are believed to contain a significant population of cosmic rays. From the radio and probably hard X-ray bands it is known that clusters are the spatially most extended emitters of non-thermal radiation in the Universe.…

Cosmology and Nongalactic Astrophysics · Physics 2019-08-14 W. Domainko , D. Nedbal , J. A. Hinton , O. Martineau-Huynh

TeV Gamma Ray Emission from Southern Sky Objects and CANGAROO Project

We report recent results of the CANGAROO Collaboration on very high energy gamma ray emission from pulsars, their nebulae, SNR and AGN in the southern sky. Observations are made in South Australia using the imaging technique of detecting…

Astrophysics · Physics 2009-10-30 T. Kifune , S. A. Dazeley , P. G. Edwards , T. Hara , Y. Hayami , S. Kamei , R. Kita , T. Konishi , A. Masaike , Y. Matsubara , Y. Matsuoka , Y. Mizumoto , M. Mori , H. Muraishi , Y. Muraki , T. Naito , K. Nishijima , S. Ogio , J. R. Patterson , M. D. Roberts , G. P. Rowell , T. Sako , K. Sakurazawa , R. Susukita , A. Suzuki , R. Suzuki , T. Tamura , T. Tanimori , G. J. Thornton , S. Yanagita , T. Yoshida , T. Yoshikoshi