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The effective observation time of Imaging Air Cherenkov Telescopes (IACTs) plays an important role in the detection of gamma-ray sources, especially when the expected flux is low. This time is strongly limited by the atmospheric conditions.…

Instrumentation and Methods for Astrophysics · Physics 2020-09-29 Dorota Sobczyńska , Katarzyna Adamczyk , Julian Sitarek , Michal Szanecki

The Imaging Atmospheric Cherenkov Technique (IACT) is unusual in astronomy as the atmosphere actually forms an intrinsic part of the detector system, with telescopes indirectly detecting very high energy particles by the generation and…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 M. K. Daniel

High energy photons from astrophysical sources are unique probes for some predictions of candidate theories of Quantum Gravty (QG). In particular, imaging atmospheric Cherenkov telescopes (IACTs) are instruments optimised for astronomical…

High Energy Astrophysical Phenomena · Physics 2021-09-21 Tomislav Terzić , Daniel Kerszberg , Jelena Strišković

Recently, ground-based very high-energy (VHE) gamma-ray astronomy achieved a remarkable advancement in the development of the observational technique for the registration and study of gamma-ray emission above 100 GeV. Construction of…

Astrophysics · Physics 2007-08-30 A. Konopelko , J. P. Finley , G. Urbanski

In recent years, Imaging Atmospheric Cherenkov Telescopes (IACTs) have discovered a rich diversity of very high energy (VHE, > 100 GeV) gamma-ray emitters in the sky. These instruments image Cherenkov light emitted by gamma-ray induced…

Instrumentation and Methods for Astrophysics · Physics 2009-05-27 Stefan Ohm , Christopher van Eldik , Kathrin Egberts

Imaging air Cherenkov telescopes (IACTs) detect the Cherenkov light from extensive air showers (EAS) initiated by very high energy (VHE) gamma-rays impinging on the Earth's atmosphere. Due to the overwhelming background from hadron induced…

Imaging Atmospheric Cherenkov Telescopes (IACTs) are very-large telescopes designed to detect the nanosecond-timescale flashes produced within extended air showers. Because IACTs are sensitive to the Cherenkov light (UV/blue) and use…

Instrumentation and Methods for Astrophysics · Physics 2019-08-12 T. Hassan , M. K. Daniel

As TeV gamma-ray astronomy progresses into the era of the Cherenkov Telescope Array (CTA), there is a desire for the capacity to instantaneously follow up on transient phenomena and continuously monitor gamma-ray flux at energies above…

The Cherenkov Telescope Array (CTA) is the next-generation stereoscopic system of Imaging Atmospheric Cherenkov Telescopes (IACTs). In IACTs, the atmosphere is used as a calorimeter to measure the energy of extensive air showers induced by…

Instrumentation and Methods for Astrophysics · Physics 2023-06-14 Mario Pecimotika , Dijana Dominis Prester , Dario Hrupec , Saša Mićanović , Lovro Pavletić , Julian Sitarek

The Imaging Atmospheric Cherenkov Telescope (IACT) works by imaging the very short flash of Cherenkov radiation generated by the cascade of relativistic charged particles produced when a TeV gamma ray strikes the atmosphere. This energetic…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 F. Krayzel , G. Maurin , L. Brunetti , J. -M. Dubois , A. Fiasson , L. Journet , G. Lamanna , T. Leflour , B. Lieunard , I. Monteiro , S. Rosier-Lees

Ground-based atmospheric Cherenkov telescopes are proven to be effective instruments for observations of very high energy (VHE) gamma-radiation from celestial objects. For effective use of such technique one needs detailed Monte Carlo…

Astrophysics · Physics 2009-10-31 A. Konopelko , A. Plyasheshnikov

The high energy end of gamma-ray source spectra might provide important clues regarding the nature of the processes involved in gamma-ray emission. Several galactic sources with hard emission spectra extending up to more than 30TeV have…

Astrophysics · Physics 2008-11-26 Pierre Colin , Stephan LeBohec , Jamie Holder

The operation of the future Cherenkov Telescope Array (CTA), the next generation of Imaging Atmospheric Cherenkov Telescopes (IACTs), as an Open Observatory requires data products and analysis tools to be accessible and usable by the…

Instrumentation and Methods for Astrophysics · Physics 2021-01-18 Cosimo Nigro , Tarek Hassan

The Cherenkov Telescope Array (CTA), conceived as an array of tens of imaging atmospheric Cherenkov telescopes (IACTs), is an international project for a next-generation ground-based gamma-ray observatory, aiming to improve on the…

Instrumentation and Methods for Astrophysics · Physics 2021-09-14 Tjark Miener , Daniel Nieto , Aryeh Brill , Samuel Spencer , Jose Luis Contreras

Over the last three decades, the ground-based technique of imaging atmospheric Cherenkov telescopes has established itself as a powerful scientific discipline. About 250 very high gamma-ray sources of both galactic and extragalactic origin…

Instrumentation and Methods for Astrophysics · Physics 2024-11-18 Razmik Mirzoyan

A significant source of noise for Imaging Atmospheric Cherenkov Telescopes (IACTs), which are designed to measure air showers caused by astrophysical gamma rays, is optical light emitted from the night sky. This Night Sky Background (NSB)…

Instrumentation and Methods for Astrophysics · Physics 2025-06-30 Gerrit Roellinghoff , Samuel T. Spencer , Stefan Funk

The Cherenkov Telescope Array (CTA) \cite{CTA:2010} will be the successor to current Imaging Atmospheric Cherenkov Telescopes (IACT) like H.E.S.S., MAGIC and VERITAS. CTA will improve in sensitivity by about an order of magnitude compared…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 E. Birsin , J. Colomé , D. Hoffmann , H. Koeppel , G. Lamanna , T. Le Flour , A. Lopatin , E. Lyard , D. Melkumyan , I. Oya , J-L. Panazol , S. Schlenstedt , T. Schmidt , U. Schwanke , R. Walter , P. Wegner

Very High Energy (VHE) gamma rays and charged cosmic rays (CCRs) provide an observational window into the acceleration mechanisms of extreme astrophysical environments. One of the major challenges at Imaging Air Cherenkov Telescopes (IACTs)…

Instrumentation and Methods for Astrophysics · Physics 2023-05-03 Songshaptak De , Writasree Maitra , Vikram Rentala , Arun M. Thalapillil

The simulation of atmospheric showers through Monte-Carlo processes as well as their projection into Imaging Atmospheric Cherenkov Telescopes (IACT) is long and very computing intensive. As these simulations are the most advanced ones from…

Instrumentation and Methods for Astrophysics · Physics 2017-09-15 Thomas Vuillaume , Florian Gaté , Gilles Maurin , Jean Jacquemier , Giovanni Lamanna

Arrays of imaging atmospheric Cherenkov telescopes (IACT) are superb instruments to probe the very-high-energy gamma-ray sky. This type of telescope focuses the Cherenkov light emitted from air showers, initiated by very-high-energy gamma…

Instrumentation and Methods for Astrophysics · Physics 2021-01-20 D. Nieto , T. Miener , A. Brill , J. L. Contreras , T. B. Humensky , R. Mukherjee