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As one of the brightest active blazars in both X-ray and very high energy $\gamma$-ray bands, Mrk 501 is very useful for physics associated with jets from AGNs. The ARGO-YBJ experiment is monitoring it for $\gamma$-rays above 0.3 TeV since…

The observation of Gamma Ray Bursts (GRBs) with very-high-energy (VHE) gamma rays can provide understanding of the particle acceleration mechanisms in GRBs, and can also be used to probe the extra-galactic background light and place…

High Energy Astrophysical Phenomena · Physics 2015-06-16 Ignacio Taboada , Rudy C. Gilmore

In many theoretical models of gamma-ray bursts (GRBs) and their afterglows, the emission of photons above 100 GeV is predicted. The Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope has detected delayed, high-energy…

High Energy Astrophysical Phenomena · Physics 2019-08-13 Taylor Aune

The highest energy gamma-rays from gamma-ray bursts (GRBs) have important implications for their radiation mechanism. Here we report for the first time the detection of gamma-rays up to 13 TeV from the brightest GRB 221009A by the Large…

High Energy Astrophysical Phenomena · Physics 2023-11-27 Zhen Cao , F. Aharonian , Q. An , A. 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 , D. della Volpe , 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 , M. Heller , 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 , S. 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 , 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 , X. Zuo

The All-sky Medium Energy Gamma-ray Observatory (AMEGO) is a probe class mission concept that will provide essential contributions to multimessenger astrophysics in the late 2020s and beyond. AMEGO combines high sensitivity in the 200 keV…

Instrumentation and Methods for Astrophysics · Physics 2019-11-27 Julie McEnery , Juan Abel Barrio , Ivan Agudo , Marco Ajello , José-Manuel Álvarez , Stefano Ansoldi , Sonia Anton , Natalia Auricchio , John B. Stephen , Luca Baldini , Cosimo Bambi , Matthew Baring , Ulisses Barres , Denis Bastieri , John Beacom , Volker Beckmann , Wlodek Bednarek , Denis Bernard , Elisabetta Bissaldi , Peter Bloser , Harsha Blumer , Markus Boettcher , Steven Boggs , Aleksey Bolotnikov , Eugenio Bottacini , Vladimir Bozhilov , Enrico Bozzo , Michael Briggs , Jim Buckley , Eric Burns , Sara Buson , Riccardo Campana , Regina Caputo , Martina Cardillo , Ezio Caroli , Daniel Castro , S. Brad Cenko , Eric Charles , Wenlei Chen , Teddy Cheung , Stefano Ciprini , Paolo Coppi , Rui Curado da Silva , Sara Cutini , Filippo D'Ammando , Alessandro De Angelis , Michaël De Becker , Georgia De Nolfo , Stefano Del Sordo , Mattia Di Mauro , Leonardo Di Venere , Stefano Dietrich , Seth Digel , Alberto Dominguez , Michele Doro , Elizabeth Ferrara , Brian Fields , Justin Finke , Luca Foffano , Chris Fryer , Yasushi Fukazawa , Stefan Funk , Dario Gasparrini , Joseph Gelfand , Markos Georganopoulos , Francesco Giordano , Andrea Giuliani , Christian Gouiffes , Brian Grefenstette , Isabelle Grenier , Sean Griffin , Eric Grove , Sylvain Guiriec , Alice Harding , Pat Harding , Dieter Hartmann , Elizabeth Hays , Margarita Hernanz , Jack Hewitt , Jamie Holder , Michelle Hui , Andrew Inglis , Robert Johnson , Sam Jones , Gottfried Kanbach , Oleg Kargaltsev , Sarah Kaufmann , Matthew Kerr , Carolyn Kierans , Fabian Kislat , Alexei V. Klimenko , Jurgen Knodlseder , Daniel Kocveski , Joachim Kopp , Henric Krawczynsiki , John Krizmanic , Hidetoshi Kubo , Naoko Kurahashi Neilson , Philippe Laurent , Jean-Philippe Lenain , Hui Li , Amy Lien , Tim Linden , Jan Lommler , Francesco Longo , Michael Lovellette , Marcos López , Antonios Manousakis , Lea Marcotulli , Alexandre Marcowith , Manel Martinez , Marc McConnell , Jessica Metcalfe , Eileen Meyer , Manuel Meyer , Roberto Mignani , John Mitchell , Tsunefumi Mizuno , Alexander Moiseev , Daniel Morcuende , Igor Moskalenko , Michael Moss , Kazuhiro Nakazawa , M. Nicola Mazziotta , Uwe Oberlack , Masanori Ohno , Foteini Oikonomou , Roopesh Ojha , Nicola Omodei , Elena Orlando , Nepomuk Otte , Vaidehi S Paliya , Lucas Parker , Barbara Patricelli , Jeremy Perkins , Maria Petropoulou , Carlotta Pittori , Martin Pohl , Troy Porter , Elisa Prandini , Chanda Prescod-Weinstein , Judith Racusin , Riccardo Rando , Bindu Rani , Marc Ribó , James Rodi , Miguel A. Sanchez-Conde , Pablo Saz Parkinson , Richard Schirato , Peter Shawhan , Chris Shrader , Jacob Smith , Karl Smith , Antonio Stamerra , Lukasz Stawarz , Andy Strong , Inga Stumke , Hiro Tajima , Hiromitsu Takahashi , Yasuyuki Tanaka , Vincent Tatischeff , Lih-Sin The , David Thompson , Luigi Tibaldo , John Tomsick , Lucas Uhm , Tonia Venters , Tom Vestrand , Giacomo Vianello , Zorawar Wadiasingh , Roland Walter , Xilu Wang , David Williams , Colleen Wilson-Hodge , Matthew Wood , Richard Woolf , Eric Wulf , George Younes , Luca Zampieri , Silvia Zane , Bing Zhang , Haocheng Zhang , Stephan Zimmer , Andreas Zoglauer , Alexander van der Horst

The Space-based multi-band astronomical Variable Object Monitor (SVOM) mission is dedicated to the detection, localization and broad-band study of Gamma-Ray Bursts (GRBs) and other high-energy transient phenomena. The Gamma Ray Monitor…

Instrumentation and Methods for Astrophysics · Physics 2009-07-17 Yongwei Dong , Bobing Wu , Yanguo Li , Yongjie Zhang , Shuangnan Zhang

Gamma-Ray Bursts (GRBs) are the brightest sources in the universe, emit mostly in the hard X-ray energy band and have been detected at redshifts up to ~8.1. Thus, they are in principle very powerful probes for cosmology. I shortly review…

Cosmology and Nongalactic Astrophysics · Physics 2009-08-11 L. Amati

Air-shower measurements in the primary energy range beyond 10 TeV can be used to address important questions of astroparticle and particle physics. The most prominent among these questions are the search for the origin of charged Galactic…

Instrumentation and Methods for Astrophysics · Physics 2014-03-25 Martin Tluczykont , Daniel Hampf , Dieter Horns , Dominik Spitschan , Leonid Kuzmichev , Vasily Prosin , Christian Spiering , Ralf Wischnewski

Published EGRET spectra from blazars extend only to 10 GeV, yet EGRET has detected approximately 2000 gamma-rays above 10 GeV of which about half are at high Galactic latitude. We report a search of these high-energy gamma-rays for…

Astrophysics · Physics 2009-11-06 Brenda L. Dingus , David L. Bertsch

Current detectors for Very-High-Energy $\gamma$-ray astrophysics are either pointing instruments with a small field of view (Cherenkov telescopes), or large field-of-view instruments with relatively large energy thresholds (extensive air…

Instrumentation and Methods for Astrophysics · Physics 2018-03-28 P. Assis , U. Barres de Almeida , A. Blanco , R. Conceição , B. D'Ettore Piazzoli , A. De Angelis , M. Doro , P. Fonte , L. Lopes , G. Matthiae , M. Pimenta , R. Shellard , B. Tomé

After more than six and half years in orbit, the ESA space observatory INTEGRAL has provided new, exciting results in the soft gamma-ray energy range (from a few keV to a few MeV). With the discovery of about 700 hard X-Ray sources, it has…

Cosmology and Nongalactic Astrophysics · Physics 2011-03-28 P. Ubertini , A. Corsi , S. Foley , S. McGlynn , G. De Cesare , A. Bazzano

In this paper we report on the observation of the anisotropy of cosmic ray arrival direction at different angular scales with ARGO-YBJ. Evidence of new few-degree excesses throughout the sky region 195$^{\circ}\leq$ R.A. $\leq$…

High Energy Astrophysical Phenomena · Physics 2019-08-14 G. DI SCIASCIO

The Pierre Auger Observatory has been designed to study the highest-energy cosmic rays in nature (E > 10^{18.5} eV). The determination of their arrival direction, energy and composition is performed by the analysis of the atmospheric…

Gamma-ray bursts (GRBs) are one of the main targets for the observations of the MAGIC telescopes. As a result of the effort in improving the sensitivity of the instrument and the automatic follow-up strategy, MAGIC detected two GRBs in the…

Data from the Tibet-III air shower array (with energies around 3 TeV) and from the Tibet-II array (with energies around 10 TeV) have been searched for diffuse gamma rays from the Galactic plane. These arrays have an angular resolution of…

Astrophysics · Physics 2009-11-07 M. Amenomori et al.

Project GRAND presents the results of a search for coincident high-energy gamma ray events in the direction and at the time of nine Gamma Ray Bursts (GRBs) detected by BATSE. A gamma ray has a non-negligible hadron production cross section;…

Astrophysics · Physics 2007-05-23 T. F. Lin , J. Carpenter , S. Desch , J. Gress , J. Poirier , A. Roesch

An antenna array devoted to the autonomous radio-detection of high energy cosmic rays is being deployed on the site of the 21 cm array radio telescope in XinJiang, China. Thanks in particular to the very good electromagnetic environment of…

Instrumentation and Methods for Astrophysics · Physics 2011-02-28 D. Ardouin , C. Carloganu , D. Charrier , Q. Gou , H. Hu , L. Kai , P. Lautridou , O. Martineau-Huynh , V. Niess , O. Ravel , T. Saugrin , X. Wu , J. Zhang , Y. Zhang , M. Zhao , Y. Zheng

The Advanced Gamma-ray Imaging System (AGIS) is a next-generation ground-based gamma-ray observatory being planned in the U.S. The anticipated sensitivity of AGIS is about one order of magnitude better than the sensitivity of current…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 G. Maier

Since its early phases of operation, the AGILE satellite is observing Gamma Ray Bursts (GRBs) over an energy range potentially spanning six orders of magnitude. In the hard X-ray band the SuperAGILE imager provides localization of about one…

gamma-ray bursts (GRBs) are likely sources of ultra-high energy, >10^{19} eV, protons and high energy, >1 TeV, neutrinos. Large volume detectors of ultra high energy cosmic rays (UHECRs) and high energy neutrinos, which are already…

Astrophysics · Physics 2010-11-11 E. Waxman