RT Journal Article T1 MAGIC-II's central pixel system for simultaneous optical and gamma-ray observation A1 Hoang, Kim Dinh A1 Hassan, Tarek A1 Angel Tejedor, Luis A1 Barrio Uña, Juan Abel A1 López Moya, Marcos A1 Fink, David A1 Will, Martin A1 Contreras González, José Luis AB The MAGIC telescopes are a system of two imaging atmospheric Cherenkov telescopes designed to observe very-high-energy y rays. MAGIC utilizes a large reflective surface and photodetectors with ultrafast time response to capture Cherenkov photons. These features, together with the dedicated system installed in the central photomultiplier tube of their camera, so-called central pixel system (CPS), turn MAGIC into a suitable telescope to study high-speed optical astronomy in the millisecond (ms) regime. We report on the status of the CPS currently mounted in the MAGIC-II camera, its performance and calibration to demonstrate the sensitivity of MAGIC-II to ms optical pulses, for both transient and periodic signals, and discuss its potential over several science cases. (C) The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. PB Society of Photo-optical Instrumentation Engineers (SPIE) SN 2329-4124 YR 2020 FD 2020-08-28 LK https://hdl.handle.net/20.500.14352/7619 UL https://hdl.handle.net/20.500.14352/7619 LA eng NO © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. We acknowledge the financial support of the German Federal Ministry of Education and Research (BMBF), the German Research Foundation (DFG) and The Max Planck Society for the Advancement of Science (MPG), and the European Regional Development Fund (ERDF) under the Spanish Ministry of Economy and Competitiveness (MINECO) Grant FPA201785668. For this paper, the authors hereby declare no relevant financial interests and have no other potential conflicts of interest to disclose. NO Ministerio de Economía y Competitividad (MINECO)/FEDER NO German Federal Ministry of Education and Research (BMBF) Federal Ministry of Education & Research (BMBF) NO German Research Foundation (DFG) German Research Foundation (DFG) NO Max Planck Society for the Advancement of Science (MPG) Max Planck Society DS Docta Complutense RD 17 abr 2025