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Correcting Imaging Atmospheric Cherenkov Telescope data with atmospheric profiles obtained with an elastic light detecting and ranging system

Context. We are operating an elastic LIDAR for the monitoring of atmospheric conditions during regular observations of the MAGIC Telescopes. Aims. We present and evaluate methods to convert aerosol extinction profiles, obtained with the…

Instrumentation and Methods for Astrophysics · Physics 2023-04-26 Felix Schmuckermaier , Markus Gaug , Christian Fruck , Abelardo Moralejo , Alexander Hahn , Dijana Dominis Prester , Daniela Dorner , Lluís Font , Saša Mićanović , Razmik Mirzoyan , David Paneque , Lovro Pavletić , Julian Sitarek , Martin Will

A novel LIDAR-based Atmospheric Calibration Method for Improving the Data Analysis of MAGIC

A new method for analyzing the returns of the custom-made 'micro'-LIDAR system, which is operated along with the two MAGIC telescopes, allows to apply atmospheric corrections in the MAGIC data analysis chain. Such corrections make it…

Instrumentation and Methods for Astrophysics · Physics 2019-08-13 Christian Fruck , Markus Gaug , Roberta Zanin , Daniela Dorner , Daniel Garrido , Razmik Mirzoyan , Lluis Font

Sensitivity of the Cherenkov Telescope Array to the detection of axion-like particles at high gamma-ray opacities

Extensions of the Standard Model of particles commonly predict the existence of axion(-like) particles (ALPs) that could be detected through their coupling to photons in external magnetic fields. This coupling could lead to modifications of…

High Energy Astrophysical Phenomena · Physics 2014-12-11 M. Meyer , J. Conrad

Reconstruction of stereoscopic CTA events using deep learning with CTLearn

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

4 m Davies-Cotton telescope for the Cherenkov Telescope Array

The Cherenkov Telescope Array (CTA) is the next generation very high energy gamma-ray observatory. It will consist of three classes of telescopes, of large, medium and small sizes. The small telescopes, of 4 m diameter, will be dedicated to…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 R. Moderski , J. A. Aguilar , A. Barnacka , A. Basili , V. Boccone , L. Bogacz , F. Cadoux , A. Christov , M. Della Volpe , M. Dyrda , A. Frankowski , M. Grudzińska , M. Janiak , M. Karczewski , J. Kasperek , W. Kochański , P. Korohoda , J. Kozioł , P. Lubiński , J. Ludwin , E. Lyard , A. Marszałek , J. Michałowski , T. Montaruli , J. Nicolau-Kukliński , J. Niemiec , M. Ostrowski , Ł. Płatos , P. J. Rajda , M. Rameez , W. Romaszkan , M. Rupiński , K. Seweryn , M. Stodulska , M. Stodulski , R. Walter , K. Winiarski , Ł. Wiśniewski , A. Zagdański , K. Zietara , P. Ziółkowski , P. Żychowski

Advanced analysis and event reconstruction for the CTA Observatory

The planned Cherenkov Telescope Array (CTA) is a future observatory for very-high-energy (VHE) gamma-ray astronomy composed of one site per hemisphere. It aims at 10 times better sensitivity, a better angular resolution and wider energy…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Y. Becherini , B. Khélifi , S. Pita , M. Punch

Impact of aerosols and adverse atmospheric conditions on the data quality for spectral analysis of the H.E.S.S. telescopes

The Earth's atmosphere is an integral part of the detector in ground-based imaging atmospheric Cherenkov telescope (IACT) experiments and has to be taken into account in the calibration. Atmospheric and hardware-related deviations from…

Instrumentation and Methods for Astrophysics · Physics 2015-06-17 J. Hahn , R. de los Reyes , K. Bernlöhr , P. Krüger , Y. T. E. Lo , P. M. Chadwick , M. K. Daniel , C. Deil , H. Gast , K. Kosack , V. Marandon

Interpolation of Instrument Response Functions for the Cherenkov Telescope Array in the Context of pyirf

The Cherenkov Telescope Array (CTA) will be the next generation ground-based very-high-energy gamma-ray observatory, constituted by tens of Imaging Atmospheric Cherenkov Telescopes at two sites once its construction and commissioning are…

Instrumentation and Methods for Astrophysics · Physics 2023-09-29 Rune Michael Dominik , Maximilian Linhoff , Julian Sitarek

Building Medium Size Telescope Structures for the Cherenkov Telescope Array

The Cherenkov Telescope Array (CTA) is the future instrument in ground-based gamma-ray astronomy in the energy range from 20 GeV to 300 TeV. Its sensitivity will surpass that of current generation experiments by a factor $\sim$10,…

Instrumentation and Methods for Astrophysics · Physics 2017-08-09 A. Schulz , M. Garczarczyk , L. Oakes , S. Schlenstedt , U. Schwanke , the CTA Consortium

Surveys with the Cherenkov Telescope Array

Surveys open up unbiased discovery space and generate legacy datasets of long-lasting value. One of the goals of imaging arrays of Cherenkov telescopes like CTA is to survey areas of the sky for faint very high energy gamma-ray (VHE)…

High Energy Astrophysical Phenomena · Physics 2019-08-14 G. Dubus , J. L. Contreras , S. Funk , Y. Gallant , T. Hassan , J. Hinton , Y. Inoue , J. Knödlseder , P. Martin , N. Mirabal , M. de Naurois , M. Renaud

An Alignment System for Imaging Atmospheric Cherenkov Telescopes

The reflector used by an imaging atmospheric Cherenkov telescope (IACT) consists of a tessellated array of mirrors mounted on a large frame. This arrangement allows for a very large reflecting surface with sufficient optical quality for the…

Instrumentation and Methods for Astrophysics · Physics 2009-07-29 A. McCann , D. Hanna , M. McCutcheon

The Transients Handler System for the Cherenkov Telescope Array Observatory

The Cherenkov Telescope Array Observatory (CTAO) will be the largest and most advanced ground-based facility for gamma-ray astronomy. Several dozens of telescopes will be operated at both the Northern and Southern Hemisphere. With the…

Instrumentation and Methods for Astrophysics · Physics 2022-09-14 Kathrin Egberts , Clemens Hoischen , Constantin Steppa , Matthias Fuessling , Dominik Neise , Emma de Ona Wilhelmi , Igor Oya

Development of the photomultiplier tube readout system for the first Large-Sized Telescope of the Cherenkov Telescope Array

The Cherenkov Telescope Array (CTA) is the next generation ground-based very high energy gamma-ray observatory. The Large-Sized Telescope (LST) of CTA targets 20 GeV -- 1 TeV gamma rays and has 1855 photomultiplier tubes (PMTs) installed in…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Shu Masuda , Yusuke Konno , Juan Abel Barrio , Oscar Blanch Bigas , Carlos Delgado , Lluís Freixas Coromina , Shuichi Gunji , Daniela Hadasch , Kenichiro Hatanaka , Masahiro Ikeno , Jose Maria Illa Laguna , Yusuke Inome , Kazuma Ishio , Hideaki Katagiri , Hidetoshi Kubo , Gustavo Martínez , Daniel Mazin , Daisuke Nakajima , Takeshi Nakamori , Hideyuki Ohoka , Riccardo Paoletti , Stefan Ritt , Andrea Rugliancich , Takayuki Saito , Karl-Heinz Sulanke , Junki Takeda , Manobu Tanaka , Shunsuke Tanigawa , Luis Ángel Tejedor , Masahiro Teshima , Yugo Tsuchiya , Tomohisa Uchida , Tokonatsu Yamamoto , the LST team

The Cosmic Ray Background as a Tool for Relative Calibration of Atmospheric Cherenkov Telescopes

The atmosphere is an intrinsic part of any ground based Cherenkov gamma-ray telescope, and the telescope response is therefore sensitive to unpredictable changes in the atmospheric transparency which are difficult to measure and interpret…

Astrophysics · Physics 2009-11-07 S. LeBohec , J. Holder

Verification of the Optical System of the 9.7-m Prototype Schwarzschild-Couder Telescope

For the first time in the history of ground-based $\gamma$-ray astronomy, the on-axis performance of the dual mirror, aspheric, aplanatic Schwarzschild-Couder optical system has been demonstrated in a $9.7$-m aperture imaging atmospheric…

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The Small-Sized Telescopes for the Southern Site of the Cherenkov Telescope Array

The Cherenkov Telescope Array (CTA) will use three telescope sizes to efficiently detect cosmic gamma rays in the energy range from several tens of GeV to hundreds of TeV. The Small-Sized Telescopes (SSTs) will form the largest section of…

Instrumentation and Methods for Astrophysics · Physics 2021-10-28 R. White

Standardisation of Data Formats in Gamma-ray Astronomy

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

rta-dq-lib: a software library to perform online data quality analysis of scientific data

The Cherenkov Telescope Array (CTA) is an initiative that is currently building the largest gamma-ray ground Observatory that ever existed. A Science Alert Generation (SAG) system, part of the Array Control and Data Acquisition (ACADA)…

Instrumentation and Methods for Astrophysics · Physics 2021-05-19 Leonardo Baroncelli , Andrea Bulgarelli , Nicolo Parmiggiani , Valentina Fioretti , Antonio Addis , Giovanni De Cesare , Ambra Di Piano , Vito Conforti , Fulvio Gianotti , Federico Russo , Gilles Maurin , Thomas Vuillaume , Pierre Aubert , Emilio Garcia , Antonio Zoccoli

Calibration of the Air Shower Energy Scale of the Water and Air Cherenkov Techniques in the LHAASO experiment

The Wide Field-of-View Cherenkov Telescope Array (WFCTA) and the Water Cherenkov Detector Arrays (WCDA) of LHAASO are designed to work in combination for measuring the energy spectra of various cosmic ray species over a very wide energy…

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Quality assurance of actuators for the Medium-Sized Telescopes of the Cherenkov Telescope Array

The Cherenkov Telescope Array (CTA) is a future ground-based observatory for gamma-ray astronomy providing unparalleled sensitivity in the energy range from 20 GeV up to 300 TeV. CTA will consist of telescopes with three different sizes.…

Instrumentation and Methods for Astrophysics · Physics 2025-09-25 Heiko Salzmann , Jürgen Dick , Sebastian Diebold , Gerd Pühlhofer , Siegbert Renner , Andrea Santangelo , CTA MST Project