Related papers: TeV observations of Centaurus A

Very High Energy gamma-ray observations of Mrk 501 using TACTIC imaging gamma-ray telescope during 2005-06

In this paper we report on the Markarian 501 results obtained during our TeV $\gamma$-ray observations from March 11 to May 12, 2005 and February 28 to May 7, 2006 for 112.5 hours with the TACTIC $\gamma$-ray telescope. During 2005…

Astrophysics · Physics 2009-06-23 S. V. Godambe , R. C. Rannot , P. Chandra , K. K. Yadav , A. K. Tickoo , K. Venugopal , N. Bhatt , S. Bhattacharyya , K. Chanchalani , V. K. Dhar , H. C. Goyal , R. K. Kaul , M. Kothari , S. Kotwal , M. K. Koul , R. Koul , B. S. Sahaynathan , M. Sharma , S. Thoudam

Search for >= 400 GeV gamma-rays from the SNR Cas A

The recent detection of a hard X-ray component in the supernova remnant Cassiopeia A is interpreted as synchrotron emission from electrons accelerated to energies up to 40 TeV (Allen et al., 1997). It is therefore tempting to consider TeV…

Astrophysics · Physics 2007-05-23 P. Goret , C. Gouiffes , E. Nuss , D. C. Ellison

Correlation of $\gamma$-ray and high-energy cosmic ray fluxes from the giant lobes of Centaurus A

The spectral energy distribution of giant lobes shows one main peak detected by the Wilkinson Microwave Anisotropy Probe at low energy of $10^{-5}$ eV and a faint $\gamma$-ray flux imaged by Fermi Large Area Telescope at energy $\geq$ 100…

High Energy Astrophysical Phenomena · Physics 2015-06-18 Nissim Fraija

TeV gamma rays from PSR 1706-44

Observations made with the University of Durham Mark 6 atmospheric Cerenkov telescope confirm that PSR B1706-44 is a very high energy gamma-ray emitter. There is no indication from our dataset that the very high energy gamma-rays are…

Astrophysics · Physics 2009-10-30 P. M. Chadwick , M. R. Dickinson , N. A. Dipper , J. Holder , T. R. Kendall , T. J. L. McComb , K. J. Orford , J. L. Osborne , S. M. Rayner , I. D. Roberts , S. E. Shaw , K. E. Turver

High energy radiation from Centaurus A

We calculate for the nearest active galactic nucleus (AGN), Centaurus A, the flux of high energy cosmic rays and of accompanying secondary photons and neutrinos expected from hadronic interactions in the source. We use as two basic models…

Astrophysics · Physics 2009-08-05 M. Kachelriess , S. Ostapchenko , R. Tomas

Status of the GAMMA-400 Project

The preliminary design of the new space gamma-ray telescope GAMMA-400 for the energy range 100 MeV - 3 TeV is presented. The angular resolution of the instrument, 1-2{\deg} at E{\gamma} ~100 MeV and ~0.01^{\circ} at E{\gamma} > 100 GeV, its…

Instrumentation and Methods for Astrophysics · Physics 2015-06-03 A. M. Galper , O. Adriani , R. L. Aptekar , I. V. Arkhangelskaja , A. I. Arkhangelskiy , M. Boezio , V. Bonvicini , K. A. Boyarchuk , Yu. V. Gusakov , M. O. Farber , M. I. Fradkin , V. A. Kachanov , V. A. Kaplin , M. D. Kheymits , A. A. Leonov , F. Longo , P. Maestro , P. Marrocchesi , E. P. Mazets , E. Mocchiutti , A. A. Moiseev , N. Mori , I. Moskalenko , P. Yu. Naumov , P. Papini , P. Picozza , V. G. Rodin , M. F. Runtso , R. Sparvoli , P. Spillantini , S. I. Suchkov , M. Tavani , N. P. Topchiev , A. Vacchi , E. Vannuccini , Yu. T. Yurkin , N. Zampa , V. G. Zverev

Estimates of the cosmic gamma-ray flux at PeV to EeV energies from the EAS-MSU experiment data

Archival EAS-MSU data are searched for anomalous muonless events which may be caused by primary gamma rays with energies between 10^15 eV and 10^18 eV. We consider a refined sample of high-quality data and confirm the previously reported…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Yu. A. Fomin , N. N. Kalmykov , G. V. Kulikov , V. P. Sulakov , S. V. Troitsky

How many Ultra High Energy Cosmic Rays could we expect from Centaurus A?

The Pierre Auger Observatory has associated a few ultra high energy cosmic rays with the direction of Centaurus A. This source has been deeply studied in radio, infrared, X-ray and $\gamma$-rays (MeV-TeV) because it is the nearest…

High Energy Astrophysical Phenomena · Physics 2015-06-04 Nissim fraija , M. M. Gonzalez , M. Perez , A. Marinelli

MAGIC Gamma-ray Telescope Observation of the Perseus Cluster of Galaxies: implications for cosmic rays, dark matter, and NGC1275

The Perseus galaxy cluster was observed by the MAGIC Cherenkov telescope for a total effective time of 24.4 hr during 2008 November and December. The resulting upper limits on the gamma-ray emission above 100 GeV are in the range of 4.6 to…

High Energy Astrophysical Phenomena · Physics 2014-11-20 The MAGIC Collaboration , J. Aleksić , L. A. Antonelli , P. Antoranz , M. Backes , C. Baixeras , S. Balestra , J. A. Barrio , D. Bastieri , J. Becerra González , W. Bednarek , A. Berdyugin , K. Berger , E. Bernardini , A. Biland , R. K. Bock , G. Bonnoli , P. Bordas , D. Borla Tridon , V. Bosch-Ramon , D. Bose , I. Braun , T. Bretz , D. Britzger , M. Camara , E. Carmona , A. Carosi , P. Colin , S. Commichau , J. L. Contreras , J. Cortina , M. T. Costado , S. Covino , F. Dazzi , A. De Angelis , E. De Cea del Pozo , R. De los Reyes , B. De Lotto , M. De Maria , F. De Sabata , C. Delgado Mendez , M. Doert , A. Domínguez , D. Dominis Prester , D. Dorner , M. Doro , D. Elsaesser , M. Errando , D. Ferenc , M. V. Fonseca , L. Font , N. Galante , R. J. García López , M. Garczarczyk , M. Gaug , N. Godinovic , D. Hadasch , A. Herrero , D. Hildebrand , D. Höhne-Mönch , J. Hose , D. Hrupec , C. C. Hsu , T. Jogler , S. Klepser , T. Krähenbühl , D. Kranich , A. La Barbera , A. Laille , E. Leonardo , E. Lindfors , S. Lombardi , F. Longo , M. López , E. Lorenz , P. Majumdar , G. Maneva , N. Mankuzhiyil , K. Mannheim , L. Maraschi , M. Mariotti , M. Martínez , D. Mazin , M. Meucci , J. M. Miranda , R. Mirzoyan , H. Miyamoto , J. Moldón , M. Moles , A. Moralejo , D. Nieto , K. Nilsson , J. Ninkovic , R. Orito , I. Oya , S. Paiano , R. Paoletti , J. M. Paredes , S. Partini , M. Pasanen , D. Pascoli , F. Pauss , R. G. Pegna , M. A. Perez-Torres , M. Persic , L. Peruzzo , F. Prada , E. Prandini , N. Puchades , I. Puljak , I. Reichardt , W. Rhode , M. Ribó , J. Rico , M. Rissi , S. Rügamer , A. Saggion , T. Y. Saito , M. Salvati , M. Sánchez-Conde , K. Satalecka , V. Scalzotto , V. Scapin , C. Schultz , T. Schweizer , M. Shayduk , S. N. Shore , A. Sierpowska-Bartosik , A. Sillanpää , J. Sitarek , D. Sobczynska , F. Spanier , S. Spiro , A. Stamerra , B. Steinke , J. C. Struebig , T. Suric , L. Takalo , F. Tavecchio , P. Temnikov , T. Terzic , D. Tescaro , M. Teshima , D. F. Torres , H. Vankov , R. M. Wagner , V. Zabalza , F. Zandanel , R. Zanin , J. Zapatero , C. Pfrommer , A. Pinzke , T. A. Enßlin , S. Inoue , G. Ghisellini

A Search for Optical Laser Emission from Alpha Centauri AB

A search for laser light from the directions of Alpha Centauri A and B was performed by examining 15362 optical, high-resolution spectra obtained between 2004 and 2018. None of the spectra exhibit laser emission lines. The threshold was 10%…

Instrumentation and Methods for Astrophysics · Physics 2022-11-23 G. W. Marcy

Limits on the TeV flux of diffuse gamma rays as measured with the HEGRA air shower array

Using data from the HEGRA air shower array, taken in the period from April 1998 to March 2000, upper limits on the ratio I_gamma /I_CR of the diffuse photon flux I_gamma to the hadronic cosmic ray flux I_CR are determined for the energy…

Astrophysics · Physics 2007-05-23 HEGRA Collaboration , F. A. Aharonian

Search for VHE gamma rays from SS433/W50 with the CANGAROO-II telescope

SS433, located at the center of the supernova remnant W50, is a close proximity binary system consisting of a compact star and a normal star. Jets of material are directed outwards from the vicinity of the compact star symmetrically to the…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Sei. Hayashi , F. Kajino , T. Naito , A. Asahara , G. V. Bicknell , R. W. Clay , Y. Doi , P. G. Edwards , R. Enomoto , S. Gunji , S. Hara , T. Hara , T. Hattori , C. Itoh , S. Kabuki , H. Katagiri , A. Kawachi , T. Kifune , L. T. Ksenofontov , H. Kubo , T. Kurihara , R. Kurosaka , J. Kushida , Y. Matsubara , Y. Miyashita , Y. Mizumoto , M. Mori , H. Mori , H. Muraishi , Y. Muraki , T. Nakase , D. Nishida , K. Nishijima , M. Ohishi , K. Okumura , J. R. Patterson , R. J. Protheroe , N. Sakamoto , K. Sakurazawa , D. L. Swaby , T. Tanimori , H. Tanimura , G. Thornton , F. Tokanai , K. Tsuchiya , T. Uchida , S. Watanabe , T. Yamaoka , S. Yanagita , T. Yoshida , T. Yoshikoshi

Discovery of Very-high-energy Gamma-ray Emissions from the Low Luminosity AGN NGC 4278 by LHAASO

The first source catalog of Large High Altitude Air Shower Observatory reported the detection of a very-high-energy gamma ray source, 1LHAASO J1219+2915. In this paper a further detailed study of the spectral and temporal behavior of this…

High Energy Astrophysical Phenomena · Physics 2025-02-05 Zhen Cao , F. Aharonian , Q. An , Axikegu , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , J. T. Cai , Q. Cao , W. Y. Cao , Zhe Cao , J. Chang , J. F. Chang , A. M. Chen , E. S. Chen , Liang Chen , Lin Chen , Long Chen , M. J. Chen , M. L. Chen , Q. H. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , Y. Chen , N. 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 , X. Q. Dong , K. K. Duan , J. H. Fan , Y. Z. Fan , J. Fang , K. Fang , C. F. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. L. Feng , S. Gabici , B. Gao , C. D. Gao , L. Q. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , L. S. Geng , G. Giacinti , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , H. H. He , H. N. He , J. Y. He , X. B. He , Y. He , Y. K. Hor , B. W. Hou , C. Hou , X. Hou , H. B. Hu , Q. Hu , S. C. Hu , D. H. Huang , T. Q. Huang , W. J. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Z. C. Huang , X. L. Ji , H. Y. Jia , K. Jia , K. Jiang , X. W. Jiang , Z. J. Jiang , M. Jin , M. M. Kang , T. Ke , D. Kuleshov , K. Kurinov , B. B. Li , Cheng Li , Cong Li , D. Li , F. Li , H. B. Li , H. C. Li , H. Y. Li , J. Li , Jian Li , Jie Li , K. Li , W. L. Li , W. L. Li , X. R. Li , Xin Li , Y. Z. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , J. Lin , B. Liu , C. Liu , D. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. Y. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , Y. Liu , Y. N. Liu , R. Lu , Q. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , Z. Min , W. Mitthumsiri , H. J. Mu , Y. C. Nan , A. Neronov , Z. W. Ou , B. Y. Pang , P. Pattarakijwanich , Z. Y. Pei , M. Y. Qi , Y. Q. Qi , B. Q. Qiao , J. J. Qin , D. Ruffolo , A. Sáiz , D. Semikoz , C. Y. Shao , L. Shao , O. Shchegolev , X. D. Sheng , F. W. Shu , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , Q. N. Sun , X. N. Sun , Z. B. Sun , P. H. T. Tam , Q. W. Tang , Z. B. Tang , W. W. Tian , C. Wang , C. B. Wang , G. W. Wang , H. G. Wang , H. H. Wang , J. C. Wang , K. Wang , L. P. Wang , L. Y. Wang , P. H. Wang , R. Wang , W. Wang , X. G. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Y. J. Wang , Z. H. Wang , Z. X. Wang , Zhen Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , C. Y. Wu , H. R. 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 , G. G. Xin , Y. L. Xin , Y. Xing , Z. Xiong , D. L. Xu , R. F. Xu , R. X. Xu , W. L. Xu , L. Xue , D. H. Yan , J. Z. Yan , T. Yan , C. W. Yang , F. Yang , F. F. Yang , H. W. Yang , J. Y. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , S. B. Yang , Y. H. Yao , Z. G. Yao , Y. M. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , M. Zha , B. B. Zhang , F. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , L. X. Zhang , Li Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. B. Zhang , S. R. Zhang , S. S. Zhang , X. Zhang , X. P. Zhang , Y. F. Zhang , Yi Zhang , Yong Zhang , B. Zhao , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , F. Zheng , J. H. Zheng , B. Zhou , H. Zhou , J. N. Zhou , M. Zhou , P. Zhou , R. Zhou , X. X. Zhou , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , Y. C. Zou , X. Zuo

First Detection of sub-PeV Diffuse Gamma Rays from the Galactic Disk: Evidence for Ubiquitous Galactic Cosmic Rays beyond PeV Energies

We report, for the first time, the long-awaited detection of diffuse gamma rays with energies between 100 TeV and 1 PeV in the Galactic disk. Particularly, all gamma rays above 398 TeV are observed apart from known TeV gamma-ray sources and…

High Energy Astrophysical Phenomena · Physics 2021-05-18 M. Amenomori , Y. W. Bao , X. J. Bi , D. Chen , T. L. Chen , W. Y. Chen , Xu Chen , Y. Chen , Cirennima , S. W. Cui , Danzengluobu , L. K. Ding , J. H. Fang , K. Fang , C. F. Feng , Zhaoyang Feng , Z. Y. Feng , Qi Gao , Q. B. Gou , Y. Q. Guo , Y. Y. Guo , H. H. He , Z. T. He , K. Hibino , N. Hotta , Haibing Hu , H. B. Hu , J. Huang , H. Y. Jia , L. Jiang , H. B. Jin , K. Kasahara , Y. Katayose , C. Kato , S. Kato , K. Kawata , W. Kihara , Y. Ko , M. Kozai , Labaciren , G. M. Le , A. F. Li , H. J. Li , W. J. Li , Y. H. Lin , B. Liu , C. Liu , J. S. Liu , M. Y. Liu , W. Liu , Y. -Q. Lou , H. Lu , X. R. Meng , K. Munakata , H. Nakada , Y. Nakamura , H. Nanjo , M. Nishizawa , M. Ohnishi , T. Ohura , S. Ozawa , X. L. Qian , X. B. Qu , T. Saito , M. Sakata , T. K. Sako , J. Shao , M. Shibata , A. Shiomi , H. Sugimoto , W. Takano , M. Takita , Y. H. Tan , N. Tateyama , S. Torii , H. Tsuchiya , S. Udo , H. Wang , H. R. Wu , L. Xue , Y. Yamamoto , Z. Yang , Y. Yokoe , A. F. Yuan , L. M. Zhai , H. M. Zhang , J. L. Zhang , X. Zhang , X. Y. Zhang , Y. Zhang , Yi Zhang , Ying Zhang , S. P. Zhao , Zhaxisangzhu , X. X. Zhou

Very high energy neutrino expectation from Fanaroff-Riley I sources

Fanaroff-Riley I radiogalaxies have been observed in TeV gamma-rays during the last decades. The origin of the emission processes related with this energy band is still under debate. Here we consider the case of the two closest…

High Energy Astrophysical Phenomena · Physics 2015-06-23 A. Marinelli , N. Fraija

Survey of nearby active galactic nuclei with the HAWC Observatory

The High Altitude Water Cherenkov Observatory (HAWC) has a wide field-of-view (FOV, $\sim$2sr) and a high duty cycle ($\sim$95\%), which make it a powerful survey and monitoring experiment for sources of TeV gamma rays. We present a…

High Energy Astrophysical Phenomena · Physics 2017-08-21 Zhixiang Ren , Robert Lauer , John A. J. Matthews , the HAWC Collaboration

A Search for Pulsed TeV Gamma Ray Emission from the Crab Pulsar

We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hours between 1994 November and 1997…

Astrophysics · Physics 2007-05-23 A. M. Burdett , I. H. Bond , P. J. Boyle , S. M. Bradbury , J. H. Buckley , D. A. Carter-Lewis , M. Catanese , M. F. Cawley , M. D'Vali , D. J. Fegan , S. J. Fegan , J. P. Finley , J. A. Gaidos , G. H. Gillanders , T. A. Hall , A. M. Hillas , J. Kildea , J. Knapp , F. Krennrich , M. J. Lang , S. LeBohec , R. W. Lessard , C. Masterson , P. Moriarty , J. Quinn , H. J. Rose , F. W. Samuelson , G. H. Sembroski , R. Srinivasan , V. V. Vassiliev , T. C. Weekes

Search for point sources of gamma radiation above 15 TeV with the HEGRA - AIROBICC array

A search for potential point sources of very high energy gamma rays has been carried out on the data taken simultaneously by the HEGRA AIROBICC and Scintillator arrays from August 1994 to March 2000. The list of sought sources includes…

Astrophysics · Physics 2007-05-23 HEGRA Collaboration , F. A. Aharonian

Constraints on the Emission of Gamma Rays from M31 with HAWC

Cosmic rays, along with stellar radiation and magnetic fields, are known to make up a significant fraction of the energy density of galaxies such as the Milky Way. When cosmic rays interact in the interstellar medium, they produce gamma-ray…

High Energy Astrophysical Phenomena · Physics 2020-04-10 HAWC Collaboration , A. Albert , R. Alfaro , C. Alvarez , J. C. Arteaga-Velázquez , K. P. Arunbabu , D. Avila Rojas , H. A. Ayala Solares , E. Belmont-Moreno , S. Y. BenZvi , C. Brisbois , K. S. Caballero-Mora , T. Capistrán , A. Carramiñana , S. Casanova , U. Cotti , J. Cotzomi , S. Coutiño de León , E. De la Fuente , C. de León , S. Dichiara , B. L. Dingus , M. A. DuVernois , K. Engel , C. Espinoza , H. Fleischhack , N. Fraija , A. Galván-Gámez , D. García-Aguilar , J. A. García-González , F. Garfias , M. M. González , J. A. Goodman , J. P. Harding , S. Hernandez , B. Hona , D. Huang , F. Hueyotl-Zahuantitla , P. Hüntemeyer , A. Iriarte , A. Jardin-Blicq , V. Joshi , D. Kieda , W. H. Lee , H. León Vargas , A. L. Longinotti , G. Luis-Raya , K. Malone , S. S. Marinelli , O. Martinez , I. Martinez-Castellanos , J. Martínez-Castro , J. A. Matthews , P. Miranda-Romagnoli , J. A. Morales-Soto , E. Moreno , M. Mostafá , A. Nayerhoda , L. Nellen , M. Newbold , R. Noriega-Papaqui , A. Peisker , E. G. Pérez-Pérez , Z. Ren , C. D. Rho , D. Rosa-González , M. Rosenberg , R. Rubenzahl , H. Salazar , F. Salesa Greus , A. Sandoval , M. Schneider , G. Sinnis , A. J. Smith , R. W. Springer , P. Surajbali , E. Tabachnick , O. Tibolla , K. Tollefson , I. Torres , L. Villaseñor , J. Wood , T. Yapici , A. Zepeda , H. Zhou

Observation of Gamma Rays from the Galactic Center with the MAGIC Telescope

Recently, the Galactic Center has been reported to be a source of very high energy (VHE) gamma-rays by the VERITAS, CANGAROO and HESS experiments. The energy spectra as measured by these experiments show substantial differences. In this…

Astrophysics · Physics 2009-11-13 J. Albert , MAGIC collaboration