Unspecified Emilio Garcia Profile

Emilio Garcia

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Proceedings Article | 25 July 2024 Presentation + Paper

The first release of the Cherenkov Telescope Array Observatory array control and data acquisition software

I. Oya, P. Aubert, L. Baroncelli, P. Bolle, P. Bruno, A. Bulgarelli, S. Caroff, L. Castaldini, V. Conforti, A. Costa, L. David, G. De Cesare, E. de Ona Wilhelmli, A. Di Piano, K. Egberts, R. Fernandez, V. Fioretti, S. Fukami, E. Garcia, E. García, H. Gasparyan, S. Germani, C. Hoischen, F. Incardona, D. Kostunin, B. Lopez, E. Lyard, G. Maurin, D. Melkumyan, K. Munari, T. Murach, A. Muraczewski, N. Nakhjiri, D. Neise, G. Panebianco, N. Parmiggiani, E. Pietriga, V. Pollet, I. Sadeh, S. Sah, A. Sarkar, M. Schefer, T. Schmidt, D. Soldevila, C. Steppa, D. Torres, A. Tramacere, R. Vallés, T. Vuillaume, F. Werner

Proceedings Volume 13101, 131011D (2024) https://doi.org/10.1117/12.3017568

KEYWORDS: Telescopes, Atmospheric Cherenkov telescopes, Data acquisition, Control systems, Observatories, Design, Astronomy

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The Cherenkov Telescope Array Observatory (CTAO) is the next-generation atmospheric Cherenkov gamma-ray project. CTAO will be deployed at two sites, one in the Northern and the other in the Southern Hemisphere, containing telescopes of three different sizes for covering different energy domains. The commissioning of the first CTAO Large-sized Telescope (LST-1) is being finalized at the CTAO Northern site. Additional calibration and environmental monitoring instruments such as laser imaging detection and ranging (LIDAR) instruments and weather stations will support the telescope operations. The Array Control and Data Acquisition (ACADA) system is the central element for onsite CTAO operations. ACADA controls, supervises, and handles the data generated by the telescopes and the auxiliary instruments. It will drive the efficient planning and execution of observations while handling the several Gb/s camera data generated by each CTAO telescope. The ACADA system contains the CTAO Science Alert Generation Pipeline – a real-time data processing and analysis pipeline, dedicated to the automatic generation of science alert candidates as data are being acquired. These science alerts, together with external alerts arriving from other scientific instruments, will be managed by the Transients Handler (TH) component. The TH informs the Short-term Scheduler of ACADA about interesting science alerts, enabling the modification of ongoing observations at sub-minute timescales. The capacity for such fast reactions – together with the fast movement of CTAO telescopes – makes CTAO an excellent instrument for studying high-impact astronomical transient phenomena. The ACADA software is based on the Alma Common Software (ACS) framework, and written in C++, Java, Python, and Javascript. The first release of the ACADA software, ACADA REL1, was finalized in July 2023, and integrated after a testing campaign with the LST-1 finalized in October 2023. This contribution describes the design and status of the ACADA software system.

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