Related papers: The angular resolution of GRAPES-3 EAS array after…

Mastering 3D-detection of Extensive Air Showers in Cherenkov Light

A new SPHERE seires complex extensive air showers detector is under development. The main goal of its mission is to study the mass composition of cosmic ray nuclei in the 1-100 PeV energy range at a new level. The already well-established…

High Energy Astrophysical Phenomena · Physics 2025-10-16 Elena A. Bonvech , Olga V. Cherkesova , Dmitriy V. Chernov , Elena L. Entina , Vladimir I. Galkin , Vladimir A. Ivanov , Timofey A. Kolodkin , Natalia O. Ovcharenko , Dmitriy A. Podgrudkov , Tatiana M. Roganova , Maxim D. Ziva

Measurement of the Gamma-Ray Energy Spectrum beyond 100 TeV from the HESS J1843$-$033 Region

HESS J1843$-$033 is a very-high-energy gamma-ray source whose origin remains unidentified. This work presents, for the first time, the energy spectrum of gamma rays beyond $100\, {\rm TeV}$ from the HESS J1843$-$033 region using the data…

High Energy Astrophysical Phenomena · Physics 2023-08-29 M. Amenomori , S. Asano , 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 , A. Gomi , Q. B. Gou , Y. Q. Guo , Y. Y. Guo , H. H. He , Z. T. He , K. Hibino , N. Hotta , Haibing Hu , H. B. Hu , K. Y. Hu , J. Huang , H. Y. Jia , L. Jiang , P. Jiang , H. B. Jin , K. Kasahara , Y. Katayose , C. Kato , S. Kato , T. Kawashima , K. Kawata , M. Kozai , D. Kurashige , Labaciren , G. M. Le , A. F. Li , H. J. Li , W. J. Li , Y. Li , Y. H. Lin , B. Liu , C. Liu , J. S. Liu , L. Y. Liu , M. Y. Liu , W. Liu , X. L. Liu , Y. -Q. Lou , H. Lu , X. R. Meng , Y. Meng , K. Munakata , K. Nagaya , Y. Nakamura , Y. Nakazawa , H. Nanjo , C. C. Ning , M. Nishizawa , M. Ohnishi , S. Okukawa , S. Ozawa , L. Qian , X. Qian , X. L. Qian , X. B. Qu , T. Saito , Y. Sakakibara , M. Sakata , T. Sako , 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 , Y. P. Wang , Wangdui , H. R. Wu , Q. Wu , J. L. Xu , L. Xue , Z. Yang , Y. Q. Yao , J. Yin , Y. Yokoe , N. P. Yu , A. F. Yuan , L. M. Zhai , C. P. Zhang , H. M. Zhang , J. L. Zhang , X. Zhang , X. Y. Zhang , Y. Zhang , Yi Zhang , Ying Zhang , S. P. Zhao , Zhaxisangzhu , X. X. Zhou

Probing the magnitude of asymmetries in the lateral density distribution of electrons in EAS

The lateral density distributions (LDD) of inclined cosmic ray air shower are asymmetric and the corresponding iso-density contours are of increasing eccentric ellipses with zenith angles of different showers. The polar asymmetry of the…

High Energy Astrophysical Phenomena · Physics 2022-03-08 Animesh Basak , Rajat K. Dey

Energy Spectrum and Mass Composition around the Knee by EAS Measurements

Primary cosmic ray particles above energies of about 100 TeV are investigated by large-area ground based detector installations, observing various components of the development of extensive air-showers (EAS). By such an indirect access to…

Astrophysics · Physics 2008-11-26 A. Haungs

Estimation of Shower Parameters in Wavefront Sampling Technique

Wavefront sampling experiments record arrival times of \v{C}erenkov photons with high precision at various locations in \v{C}erenkov pool using a distributed array of telescopes. It was shown earlier that this photon front can be fitted…

Astrophysics · Physics 2009-09-25 V. R. Chitnis , P. N. Bhat

Detection of elusive Radio and Optical emission from Cosmic-ray showers in the 1960s

During the 1960s, a small but vibrant community of cosmic ray physicists, pioneered novel optical methods of detecting extensive air showers (EAS) in the Earth's atmosphere with the prime objective of searching for point sources of…

Instrumentation and Methods for Astrophysics · Physics 2011-04-14 David J. Fegan

Angular Resolution of the Pachmarhi Array of Cerenkov Telescopes

The Pachmarhi Array of Cerenkov Telescopes consists of a distributed array of 25 telescopes that are used to sample the atmospheric Cerenkov Photon showers. Each telescope consists of 7 parabolic mirrors each viewed by a single…

Astrophysics · Physics 2009-04-22 P. Majumdar , P. N. Bhat , B. S. Acharya , V. R. Chitnis , M. A. Rahman , B. B. Singh , P. R. Vishwanath

Radio wavefront of very inclined extensive air-showers: a simulation study for extended and sparse radio arrays

Radio-detection is becoming an established technique for the detection of air showers induced by cosmic particles. This is in particular true at the highest energies, where very large detection areas are required. A proper description of…

Instrumentation and Methods for Astrophysics · Physics 2022-10-04 Valentin Decoene , Olivier Martineau-Huynh , Matias Tueros

Enhancement of the Yakutsk array by atmospheric Cherenkov telescopes to study cosmic rays above $10^{15}$ eV

The aim of the Yakutsk array enhancement project is to create an instrument to study the highest-energy galactic cosmic rays (CRs) -- their sources, energy spectrum, and mass composition. Additionally, there will be unique capabilities for…

Instrumentation and Methods for Astrophysics · Physics 2010-12-24 A. A. Ivanov , S. P. Knurenko , Z. E. Petrov , M. I. Pravdin , I. Ye. Sleptsov

Horizon-T Experiment Calibrations -- Cables

An innovative detector system called Horizon-T is constructed to study Extensive Air Showers (EAS) in the energy range above 10^16 eV coming from a wide range of zenith angles (0o - 85o). The system is located at Tien Shan high-altitude…

Instrumentation and Detectors · Physics 2019-06-14 D. Beznosko , A. Iakovlev , Z. Makhataeva , M. I. Vildanova , V. V. Zhukov

Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC

We present TeV gamma-ray observations of the Crab Nebula, the standard reference source in ground-based gamma-ray astronomy, using data from the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory. In this analysis we use two…

High Energy Astrophysical Phenomena · Physics 2019-09-18 HAWC Collaboration , A. U. Abeysekara , A. Albert , R. Alfaro , C. Alvarez , J. D. Álvarez , J. R. Angeles Camacho , R. Acero , J. C. Arteaga-Velázquez , K. P. Arunbabu , D. Avila Rojas , H. A. Ayala Solares , V. Baghmanyan , E. Belmont-Moreno , S. Y. BenZvi , C. Brisbois , K. S. Cabellero-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 , J. C. Díaz-Vélez , R. W. Ellsworth , K. Engel , C. Espinoza , B. Fick , H. Fleischhack , N. Fraija , A. Galván-Gámez , J. A. García-González , F. Garfias , M. M. González , J. A. Goodman , J. P. Harding , S. Hernandez , J. Hinton , B. Hona , F. Hueyotl-Zahuantitla , C. M. Hui , P. Hüntemeyer , A. Iriarte , A. Jardin-Blicq , V. Joshi , S. Kaufmann , D. Kieda , A. Lara , W. H. Lee , H. León Vargas , J. T. Linnemann , A. L. Longinotti , G. Luis-Raya , J. Lundeen , K. Malone , S. S. Marinelli , O. Martinez , I. Martinez-Castellanos , J. Martínez-Castro , H. Martínez-Huerta , J. A. Matthews , P. Miranda-Romagnoli , J. A. Morales-Soto , E. Moreno , M. Mostafá , A. Nayerhoda , L. Nellen , M. Newbold , M. U. Nisa , R. Noriega-Papaqui , A. Peisker , E. G. Pérez-Pérez , J. Pretz , Z. Ren , C. D. Rho , C. Rivière , D. Rosa-González , M. Rosenberg , E. Ruiz-Velasco , H. Salazar , F. Salesa Greus , A. Sandoval , M. Schneider , H. Schoorlemmer , M. Seglar Arroyo , G. Sinnis , A. J. Smith , R. W. Springer , P. Surajbali , E. Tabachnick , M. Tanner , O. Tibolla , K. Tollefson , I. Torres , T. Weisgarber , S. Westerhoff , J. Wood , T. Yapici , A. Zepeda , H. Zhou

Study of longitudinal development of air showers in the knee energy range

Ground-based cosmic ray experiments detect cosmic ray mainly by measuring the longitudinal and lateral distribution of secondary particles produced in the extensive air shower (EAS). The EAS of cosmic ray in the knee energy region is…

High Energy Astrophysical Phenomena · Physics 2024-09-30 Feng Zhang , Hu Liu , Fengrong Zhu , Jacob Oloketuyi

A Method for energy estimation and mass composition determination of primary cosmic rays at Chacaltaya observation level based on atmospheric Cerenkov light technique

A new method for energy and mass composition estimation of primary cosmic ray radiation based on atmospheric Cerenkov light flux in extensive air showers (EAS) analysis is proposed. The Cerenkov light flux in EAS initiated by primary…

Astrophysics · Physics 2009-11-10 S. Mavrodiev , A. Mishev , J. Stamenov

Performance of the RF-detectors of the Astroneu Array

Since 2014, the University Campus of the Hellenic Open University (HOU) hosts the Astroneu array which is dedicated to the detection of Extensive Air Showers (EAS) induced by high energy Cosmic Rays (CR). The Astroneu array incorporates 9…

Instrumentation and Methods for Astrophysics · Physics 2023-01-18 Stavros Nonis , Antonios Leisos , Apostolos Tsirigotis , Ioannis Gkialas , Kostas Papageorgiou , Spyros Tzamarias

Investigating the Longitudinal Development of EAS with Ultra High Energies

The simulation of the extensive air showers was performed by investigating the longitudinal development parameters (N and Xmax) by using AIRES system version 19.04.0. The simulation was performed at the energy range (10^18-10^20 eV) for…

High Energy Astrophysical Phenomena · Physics 2022-01-04 Abbas Rahi Raham , A. A. Al-Rubaiee , Majida H. Al-Kubaisy

LOPES-3D, an antenna array for full signal detection of air-shower radio emission

To better understand the radio signal emitted by extensive air-showers and to further develop the radio detection technique of high-energy cosmic rays, the LOPES experiment was reconfigured to LOPES-3D. LOPES-3D is able to measure all three…

Instrumentation and Methods for Astrophysics · Physics 2013-03-28 W. D. Apel , J. C. Arteaga , L. Bähren , K. Bekk , M. Bertaina , P. L. Biermann , J. Blümer , H. Bozdog , I. M. Brancus , P. Buchholz , E. Cantoni , A. Chiavassa , K. Daumiller , V. de Souza , F. Di Pierro , P. Doll , R. Engel , H. Falcke , M. Finger , B. Fuchs , D. Fuhrmann , H. Gemmeke , C. Grupen , A. Haungs , D. Heck , J. R. Hörandel , A. Horneffer , D. Huber , T. Huege , P. G. Isar , K. -H. Kampert , D. Kang , O. Krömer , J. Kuijpers , K. Link , P. Luczak , M. Ludwig , H. J. Mathes , M. Melissas , C. Morello , J. Oehlschläger , N. Palmieri , T. Pierog , J. Rautenberg , H. Rebel , M. Roth , C. Rühle , A. Saftoiu , H. Schieler , A. Schmidt , F. G. Schröder , O. Sima , G. Toma , G. C. Trinchero , A. Weindl , J. Wochele , M. Wommer , J. Zabierowski , J. A. Zensus

On the angular distribution of extensive air showers

Angular distributions of extensive air showers with different number of charged particles in the range 2.5x10^5--4x10^7 are derived using the experimental data obtained with the EAS MSU array. Possible approximations of the obtained…

High Energy Astrophysical Phenomena · Physics 2015-05-14 M. Yu. Zotov , N. N. Kalmykov , G. V. Kulikov , V. P. Sulakov

The Unreasonable Effectiveness of the Air-Fluorescence Technique in Determining the EAS Shower Maximum

We review all existing air-fluorescence measurements of the elongation rate of extensive air showers (slope of mean EAS shower maximum (Xmax) vs log of shower energy E) above 1017 eV. We find remarkable agreement for all current and…

High Energy Astrophysical Phenomena · Physics 2022-06-08 P. Sokolsky , R. D'Avignon

First Detection of Extensive Air Showers Using a Small-Aperture Fluorescence Telescope

We report on the successful detection of extensive air showers (EAS) generated by ultra-high-energy cosmic rays using a small-aperture fluorescence telescope (FT) deployed at the Mount Aragats high-altitude research station. The instrument…

Instrumentation and Methods for Astrophysics · Physics 2026-05-07 M. Zotov , A. Trusov , P. Klimov , K. Asatryan , A. Belov , G. Gabaryan , V. Kudryavtsev , A. Murashov

Direction identification in radio images of cosmic-ray air showers detected with LOPES and KASCADE

AIMS: We want to understand the emission mechanism of radio emission from air showers to determine the origin of high-energy cosmic rays. Therefore, we study the geometry of the air shower radio emission measured with LOPES and search for…

Astrophysics · Physics 2008-09-17 A. Nigl