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A dramatic progress in the field of computer vision has been made in recent years by applying deep learning techniques. State-of-the-art performance in image recognition is thereby reached with Convolutional Neural Networks (CNNs). CNNs are…

Instrumentation and Methods for Astrophysics · Physics 2019-03-07 Tim Lukas Holch , Idan Shilon , Matthias Büchele , Tobias Fischer , Stefan Funk , Nils Groeger , David Jankowsky , Thomas Lohse , Ullrich Schwanke , Philipp Wagner

Imaging atmospheric Cherenkov telescopes (IACTs) are the main technique for detecting gamma rays with energies between tens of GeV and hundreds of TeV. Amongst them, the High Energy Stereoscopic System (H.E.S.S.) has pioneered the use of…

High Energy Astrophysical Phenomena · Physics 2026-04-01 Rodrigo Guedes Lang , Tim Unbehaun , Lars Mohrmann , Simon Steinmassl , Jim Hinton , Stefan Funk

It is anticipated that forthcoming, next generation, atmospheric Cherenkov telescope arrays will include a number of medium-sized telescopes that are constructed using a dual-mirror Schwarzschild-Couder configuration. These telescopes will…

Instrumentation and Methods for Astrophysics · Physics 2018-04-04 Hugh Dickinson , Frank Krennrich , Amanda Weinstein , Jonathan Eisch , Karen Byrum , John Anderson , Gary Drake

Optical stellar intensity interferometry with air Cherenkov telescope arrays, composed of nearly 100 telescopes, will provide means to measure fundamental stellar parameters and also open the possibility of model-independent imaging. In…

Instrumentation and Methods for Astrophysics · Physics 2015-05-30 Paul D. Nunez , Richard Holmes , David Kieda , Stephan LeBohec

The Cherenkov Telescope Array (CTA) project, led by an international collaboration of institutes, aims to create the world's largest next generation observatory for Very High Energy (VHE) gamma-ray astronomy. It will be devoted to…

Instrumentation and Methods for Astrophysics · Physics 2019-09-26 A. Dmytriiev , L. Dangeon , G. Fasola , H. Sol , A. Zech , J. Gironnet , O. Le Blanc , J. P. Amans , G. Buchholtz , J. L. Dournaux , F. de Frondat , D. Horville , J. M. Huet , I. Jégouzo , P. Laporte

Pachmarhi Array of \v{C}erenkov Telescopes(PACT), consisting of a distributed array of 25 telescopes is used to sample the atmospheric \v{C}erenkov Photon showers. The shower front is fitted to a plane and the direction of arrival of…

SPECT (Single-photon Emission Computerized Tomography) and PET (Positron Emission Tomography) are essential medical imaging tools, for which the sampling angle number, scan time should be chosen carefully to compromise between image quality…

Medical Physics · Physics 2015-06-16 Xiaolin Zhou , Minkai Yun , Xuexiang Cao , Shuangquan Liu , Lu Wang , Xianchao Huang , Long Wei

Gamma-ray astronomy from hundreds of GeV to PeV is confined to ground-based experiments that detect air showers induced by $\gamma$-rays entering Earth's atmosphere. While particle detector arrays feature huge detection areas, accurately…

Instrumentation and Methods for Astrophysics · Physics 2026-04-13 Markus Pirke , Youngwan Son , Jonas Glombitza , Martin Schneider , Ian James Watson , Christopher van Eldik

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

The CHIPS experiment will comprise a 10 kton water Cherenkov detector in an open mine pit in northern Minnesota, USA. The detector has been simulated using a full GEANT4 simulation and a series of event reconstruction algorithms have been…

Instrumentation and Detectors · Physics 2016-12-15 A. Blake , S. Germani , Y. B. Pan , A. J. Perch , M. M. Pfützner , J. Thomas , L. H. Whitehead

The upcoming Cherenkov Telescope Array (CTA) project is expected to provide unprecedented sensitivity in the low-energy (<~100 GeV) range for Cherenkov telescopes. Most of the remaining background in this energy range results from…

Instrumentation and Methods for Astrophysics · Physics 2017-11-29 Julian Sitarek , Dorota Sobczyńska , Michał Szanecki , Katarzyna Adamczyk , Paolo Cumani , Abelardo Moralejo

Monte Carlo algorithms have a growing impact on nuclear medicine reconstruction processes. One of the main limitations of myocardial perfusion imaging (MPI) is the effective mitigation of the scattering component, which is particularly…

Instrumentation and Detectors · Physics 2021-05-28 J. Zhou , A. G. Leja , M. Salvatori , D. Della Latta , A. Di Fulvio

The Cherenkov Telescope Array (CTA) will be the world's leading ground-based gamma-ray observatory allowing us to study very high energy phenomena in the Universe. CTA will produce huge data sets, of the order of petabytes, and the…

Instrumentation and Methods for Astrophysics · Physics 2018-10-02 S. Mangano , C. Delgado , M. Bernardos , M. Lallena , J. J. Rodríguez Vázquez

The Cherenkov Telescope Array (CTA) is a ground-based $\gamma$-ray observatory that will observe the full sky in the energy range from 20 GeV to 100 TeV from facilities in both hemispheres. It is proposed to consist of more than 100…

Instrumentation and Methods for Astrophysics · Physics 2015-09-07 Ramin Marx , Raquel de los Reyes

Muon ring images observed with Imaging Atmospheric Cherenkov Telescopes (IACTs) provide a powerful means to calibrate the optical throughput of IACTs and monitor their optical point spread function. We investigate whether muons ring images…

Instrumentation and Methods for Astrophysics · Physics 2019-07-22 Markus Gaug , Stephen Fegan , Alison Mitchell , Maria-Concetta Maccarone , Teresa Mineo , Akira Okumura

Imaging atmospheric Cherenkov telescopes are continuously exposed to varying weather conditions that have short and long-term effects on their response to Cherenkov light from extensive air showers. This work presents the implementation of…

Instrumentation and Methods for Astrophysics · Physics 2022-09-21 M. Nievas Rosillo

Imaging atmospheric Cherenkov telescopes, such as the VERITAS array, are subject to the Night Sky Background (NSB) and electronic noise, which contribute to the total signal of pixels in the telescope camera. The contribution of noise…

Instrumentation and Methods for Astrophysics · Physics 2023-09-27 Maria Kherlakian

The Cherenkov Telescope Array (CTA) is the next generation very high-energy gamma-ray observatory, with at least 10 times higher sensitivity than current instruments. CTA will comprise several tens of Imaging Atmospheric Cherenkov…

The CoMET R&D project focuses on the development of a new technique for the observation of very high-energy (VHE) $\gamma$-rays from the ground at energies above ~200 GeV, thus covering emission from soft-spectrum sources. The CoMET array…

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