Volume 501 - 39th International Cosmic Ray Conference (ICRC2025) - Gamma-Ray Astrophysics
The SST-1M stereoscopic system
 The SST-1M Collaboration, A. Araudo, C.M. Alispach, M. Balbo, V. Beshley, J. Blazek, J. Borkowski, S. Boula, T. Bulik, F. Cadoux, S. Casanova, A. Christov, J. Chudoba, L. Chytka, P. Čechvala, P. Dedic, Y. Favre, M. Garczarczyk, L. Gibaud, T. Gieras, E. Glowacki, P. Hamal, M. Heller, M. Hrabovsky, P. Janecek, M. Jelinek, V. Jilek, J. Jurysek, V. Karas, B. Lacave, É. Lyard, E. Mach, D. Mandat, S. Michal, J. Michalowksi, M. Miron, R. Moderski, T. Montaruli*, S.R. Muthyala, A. Muraczewski, A.L. Muller, K. Nalewajski, A. Nagai, D. Neise, J. Niemiec, M. Nikolajuk, V. Novotný, M. Palatka, M. Pech, M. Prouza, P. Schovanek, V. Sliusar, L. Stawarz, R. Sternberger, M. Stodulska, J. Strobl, P. Swierk, J. Świerblewski, T. Tavernier, P. Travnicek, M. Ostrowski, I. Troyano Pujadas, J. Vicha, D. della Volpe, R. Walter, W. Marek and K. Ziȩtaraet al. (click to show)
*: corresponding author
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Pre-published on: September 24, 2025
Published on: —
Abstract
The Single-Mirror Small-Size Telescope (SST-1M) is an Imaging Atmospheric Cherenkov Telescope designed for detecting very high-energy gamma rays. With a compact design achieved through the adoption of silicon-photomultiplier pixels and a lightweight structure, SST-1M offers a large field of view of about 9° and features a mirror system of 4 m diameter with an optical PSF (at 80% of photon inclusion) of 0.08° on axis and 0.21° at 4° off-axis, and a fully digitizing readout almost deadtime free up to few kHz. The SST-1M achieved a high-performance and cost-effective solution for implementing an array of small-sized telescopes. The stereoscopic system of two SST-1Ms is temporarily installed at the Ondřejov Observatory in the Czech Republic. From an altitude of only about 510 m and in harsh meteorological conditions, the system is detecting galactic sources and flares of AGNs. The accurate calibration of the detector and the simulation benchmark are ongoing. The results of its performance are shown. A future final location is being considered and a future performance outlook is discussed.
DOI: https://doi.org/10.22323/1.501.0771
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