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The Southern Wide-field Gamma-ray Observatory (SWGO) is an R&D project to plan and design the next observatory to detect gamma rays in the Southern hemisphere. The experiment, planned to be placed at an altitude greater than 4400 m, is…

High Energy Physics - Experiment · Physics 2023-09-12 Ruben Conceição

The future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe Galactic plane, Galactic Center, Fermi Bubbles, Crab, Vela, Cygnus X,…

We report on measurements of the cosmic-ray induced gamma-ray emission of Earth's atmosphere by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope. The LAT has observed the Earth during its commissioning phase and with a…

High Energy Astrophysical Phenomena · Physics 2010-01-07 LAT collaboration

Over the last third of the century, a few tens of events, detected by ground-based cosmic ray detectors, have opened a new window in the field of high-energy astrophysics. These events have macroscopic energies, unobserved sources, an…

Astrophysics · Physics 2014-10-13 Xavier Bertou , Murat Boratav , Antoine Letessier-Selvon

Ultra-High Energy Cosmic Rays (UHECRs) are charged particles of energies above $10^{18}$ eV that originate outside of the Galaxy. Because the flux of the UHECRs at Earth is very small, the only practical way of observing UHECRs is by…

High Energy Astrophysical Phenomena · Physics 2017-05-26 Valerio Verzi , Dmitri Ivanov , Yoshiki Tsunesada

China JinPing underground Laboratory (CJPL) is the deepest underground laboratory presently running in the world. In such a deep underground laboratory, the cosmic ray flux is a very important and necessary parameter for rare event…

The Tibet AS$\gamma$ and LHAASO collaborations recently reported the observation of a $\gamma$-ray diffuse emission with energy up to the PeV from the Galactic plane. We discuss the relevance of non-uniform cosmic-ray transport scenarios…

High Energy Astrophysical Phenomena · Physics 2023-04-05 Pedro De la Torre Luque , Daniele Gaggero , Dario Grasso , Ottavio Fornieri , Kathrin Egberts , Constantin Steppa , Carmelo Evoli

The purpose of the CODALEMA experiment, installed at the Nan\c{c}ay Radio Observatory (France), is to study the radio-detection of ultra-high energy cosmic rays in the energy range of $10^{16}-10^{18} eV$. Distributed over an area of 0.25…

Instrumentation and Methods for Astrophysics · Physics 2015-06-11 P. Lautridou , the CODALEMA Collaboration

The world's largest cosmic-ray detector is nearing completion in the remote Pampas of Argentina. This instrument measures extensive air-showers with energies from ${10^{18}-10^{20}}$ eV and beyond. A surface detector array of area 3000…

Astrophysics · Physics 2010-04-15 Lawrence Wiencke , Pierre Auger Collaboration

The Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope provides both direct and indirect measurements of Galactic cosmic rays (CR). The LAT high-statistics observations of the 7 GeV - 1 TeV electron plus positron spectrum and…

High Energy Astrophysical Phenomena · Physics 2015-03-19 David J. Thompson , Luca Baldini , Yasunobu Uchiyama

We review progress in high-energy cosmic ray physics focusing on recent experimental results and models developed for their interpretation. Emphasis is put on the propagation of charged cosmic rays, covering the whole range from $\sim…

High Energy Astrophysical Phenomena · Physics 2020-01-16 M. Kachelriess , D. V. Semikoz

Tibet AS-gamma collaboration has recently reported detection of gamma-rays with energies up to Peta-electronvolt from parts of the Galactic plane. We notice that the analysis of gamma-ray flux by the Tibet AS-gamma experiment also implies…

High Energy Astrophysical Phenomena · Physics 2021-09-15 A. Neronov , D. Semikoz , Ie. Vovk

A systematic search for cosmic gamma-ray bursts (GRBs) and other short hard X-ray events in the archival data from the IBIS/ISGRI telescope of the INTEGRAL observatory over 2003-2018 has been carried out. Seven previously unknown GRBs have…

High Energy Astrophysical Phenomena · Physics 2020-05-26 I. V. Chelovekov , S. A. Grebenev , A. S. Pozanenko , P. Yu. Minaev

This article is the write-up of a rapporteur talk given at the 34th ICRC in The Hague, Netherlands. It attempts to review the results and developments presented at the conference and associated to the vibrant field of ground-based gamma-ray…

High Energy Astrophysical Phenomena · Physics 2015-10-07 Marianne Lemoine-Goumard

The very-high-energy gamma-ray sky can be surveyed on a daily basis by particle-detector arrays at high (mountain) elevation. In the northern hemisphere the survey recently conducted by the HAWC gamma-ray observatory significantly enriched…

High Energy Astrophysical Phenomena · Physics 2019-08-26 Harm Schoorlemmer

The Tibet experiment, operating at Yangbajing (4,300 m above sea level), is the lowest energy air shower array and the new high density array constructed in 1996 has sensitivity to $\gamma$-ray air showers at energies as low as 3 TeV. With…

Astrophysics · Physics 2009-10-31 M. Amenomori

The Pierre Auger Observatory was designed for a high statistics, full sky study of cosmic rays at the highest energies. Energy, direction and composition measurements are intended to illuminate the mysteries of the most energetic particles…

Astrophysics · Physics 2019-08-14 Paul Mantsch

The Auger project was designed to study the high-energy cosmic rays by measuring the properties of the showers produced in the atmosphere. The Southern Auger Observatory has taken data since January 2004 and is now completed. Results on…

Astrophysics · Physics 2008-07-08 Giorgio Matthiae

Gamma-ray Astronomy studies cosmic accelerators through their electromagnetic radiation in the energy range between ~100 MeV and ~100 TeV. The present most sensitive observations in this energy band are performed, from space, by the Large…

High Energy Astrophysical Phenomena · Physics 2011-11-29 Javier Rico