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Imaging Atmospheric Cherenkov Telescopes study the highest energy (up to tens of TeV) photon emission coming from nearby and distant astrophysical sources, thus providing valuable results from searches for Lorentz Invariance Violation (LIV)…

Pulsars are observed to emit bright and spatially extended emission at multi-TeV energies. Although such "TeV halos" appear to be an approximately universal feature of middle-aged pulsars, there remains much to be understood about these…

High Energy Astrophysical Phenomena · Physics 2023-12-19 Dan Hooper , Elena Pinetti , Anastasia Sokolenko

The development of the atmospheric Cherenkov imaging technique has led to significant advances in gamma-ray detection sensitivity in the energy range from 200 GeV to 50 TeV. The Whipple Observatory 10m reflector has detected the first…

Astrophysics · Physics 2007-05-23 T. C. Weekes

The current generation of Imaging Atmospheric telescopes (IACTs) has demonstrated the power of this observational technique, providing high sensitivity and an angular resolution of $\sim0.1^{\circ}$ per event above an energy threshold of…

High Energy Astrophysical Phenomena · Physics 2009-01-21 S. Funk , J. A. Hinton

The VERITAS imaging atmospheric Cherenkov telescope array has been observing the northern TeV sky with four telescopes since summer 2007. Over 50 gamma-ray sources have been studied, including active and starburst galaxies, pulsars and…

High Energy Astrophysical Phenomena · Physics 2019-08-13 J. Holder

The Cherenkov Telescope Array (CTA) will perform a survey of the whole Galactic disk with unprecedented sensitivity at energies up to 300 TeV. One of the key science projects of the CTA consortium is the discovery of Galactic PeVatrons…

High Energy Astrophysical Phenomena · Physics 2017-09-19 C. Trichard

In the last decades an incredible amount of evidence for the existence of dark matter (DM) has been accumulating. At the same time, many efforts have been undertaken to try to identify what dark matter is made of. Indirect searches look at…

High Energy Astrophysical Phenomena · Physics 2023-02-23 Aldo Morselli

VERITAS is one of the world's most sensitive detectors of astrophysical VHE (E $>$ 100 GeV) gamma rays. This array of four 12-m imaging atmospheric-Cherenkov telescopes has operated for 12 years, and $>$6,000 hours of observations have been…

High Energy Astrophysical Phenomena · Physics 2019-09-13 Wystan Benbow

VERITAS (Very Energetic Radiation Imaging Telescope Array System) is one of the most sensitive currently operating arrays of imaging atmospheric Cherenkov telescopes, which detect very high-energy (VHE; E > 100 GeV) gamma rays. VERITAS is…

High Energy Astrophysical Phenomena · Physics 2019-08-16 Gregory T. Richards

The signals that will be received on Earth from deep-space probes in future implementations of free-space optical communication will be extremely weak, and new ground stations will have to be developed in order to support these links. This…

Instrumentation and Methods for Astrophysics · Physics 2013-05-22 Alberto Carrasco-Casado , Mariafernanda Vilera , Ricardo Vergaz , Juan Francisco Cabrero

The Cherenkov Telescope Array (CTA) will consist of two arrays of Imaging Atmospheric Cherenkov Telescopes (IACTs) at the northern and southern hemispheres. CTA will feature IACTs with mirrors of three different sizes optimized to cover…

Instrumentation and Methods for Astrophysics · Physics 2019-07-25 Juan Cortina

The Cherenkov Telescope Array (CTA) is the next generation of Imaging Atmospheric Cherenkov Telescopes. It will reach a sensitivity and an energy resolution with no precendent in very high energy gamma-ray astronomy. In order to achieve…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 A. López-Oramas , O. Abril , O. Blanch Bigas , J. Boix , V. Da Deppo , M. Doro , L. Font , D. Garrido , M. Gaug , M. Martínez , G. Vasileiadis

Observations from multiple gamma-ray telescopes have uncovered a high energy gamma-ray source spatially coincident with the Galactic center. Recently, a compelling model for the broad-band gamma-ray emission has been formulated which posits…

High Energy Astrophysical Phenomena · Physics 2015-06-05 Tim Linden , Stefano Profumo

Imaging Atmospheric Cherenkov Telescopes (IACTs) have resulted in a breakthrough in very-high energy (VHE) gamma-ray astrophysics. While early IACT installations faced the problem of detecting any sources at all, current instruments are…

Astrophysics · Physics 2009-11-19 Konrad Bernlohr

The Cherenkov Telescope Array (CTA) is the future large observatory in the very high energy (VHE) domain. Operating from 20 GeV to 300 TeV, it will be composed of tens of Imaging Air Cherenkov Telescopes (IACTs) displaced in a large area of…

Instrumentation and Methods for Astrophysics · Physics 2016-08-18 Valentina Fioretti , Andrea Bulgarelli , Fabian Schussler

The Cherenkov Telescope Array (CTA) Observatory, with dozens of telescopes located in both the Northern and Southern Hemispheres, will be the largest ground-based gamma-ray observatory and will provide broad energy coverage from 20 GeV to…

Instrumentation and Methods for Astrophysics · Physics 2021-08-23 A. Bulgarelli , S. Caroff , A. Addis , P. Aubert , L. Baroncelli , G. De Cesare , A. DiPiano , V. Fioretti , E. Garcia , G. Maurin , N. Parmiggiani , T. Vuillaume , I. Oya , C. Hoischen

The Cherenkov Telescope Array (CTA) will be the world's first observatory for detecting gamma-rays from astrophysical phenomena and is now in its prototyping phase with construction expected to begin in 2015/16. In this work we present the…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Cameron B. Rulten , Sam J. Nolan

The Cherenkov Telescope Array (CTA) consortium aims to create the next generation Very High Energy gamma-ray observatory. It will be devoted to the observation of gamma rays over a wide band of energy, from 20 GeV to 300 TeV. Three…

Instrumentation and Methods for Astrophysics · Physics 2015-08-27 Jean-Laurent Dournaux , Jean-Michel Huet , Delphine Dumas , Jean-Philippe Amans , Gilles Fasola , Philippe Laporte , Jean-Jacques Bousquet , Hélène Sol

The Atmospheric Cherenkov Imaging Technique has opened up the gamma-ray spectrum from 100 GeV to 50 TeV to astrophysical exploration. The development of the technique (with emphasis on the early days) is described as are the basic…

Astrophysics · Physics 2016-11-09 Trevor C. Weekes

Several types of binary systems have been detected up to now at high and very high gamma-ray energies, including microquasars, young pulsars around massive stars and colliding wind binaries. The study of the sources already known, and of…