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@ARTICLE{Alispach:643477,
      author       = {Alispach, C. and Araudo, A. and Balbo, M. and Beshley, V.
                      and Blažek, J. and Borkowski, J. and Boula, S. and Bulik,
                      T. and Cadoux, F. and Casanova, S. and Christov, A. and
                      Chudoba, J. and Chytka, L. and Čechvala, P. and Dědic, P.
                      and della Volpe, D. and Favre, Y. and Garczarczyk, M. and
                      Gibaud, L. and Gieras, T. and Głowacki, E. and Hamal, P.
                      and Heller, M. and Hrabovský, M. and Janeček, P. and
                      Jelínek, M. and Jílek, V. and Juryšek, J. and Karas, V.
                      and Lacave, B. and Lyard, E. and Mach, E. and Mandát, D.
                      and Marek, W. and Michal, S. and Michałowski, J. and
                      Miroń, M. and Moderski, R. and Montaruli, T. and
                      Muraczewski, A. and Muthyala, S. R. and Müller, A. L. and
                      Nagai, A. and Nalewajski, K. and Neise, D. and Niemiec, J.
                      and Nikołajuk, M. and Novotny, Ladislav and Ostrowski, M.
                      and Palatka, M. and Pech, M. and Prouza, M. and Schovanek,
                      P. and Sliusar, V. and Stawarz, Ł. and Sternberger, R. and
                      Stodulska, M. and Świerblewski, J. and Świerk, P. and
                      Štrobl, J. and Tavernier, T. and Trávníček, P. and
                      Pujadas, I. Troyano and Vícha, J. and Walter, R. and
                      Ziętara, K.},
      title        = {{O}bservation of the {C}rab {N}ebula with the
                      {S}ingle-{M}irror {S}mall-{S}ize {T}elescope stereoscopic
                      system at low altitude},
      reportid     = {PUBDB-2026-00224, arXiv:2506.01733},
      year         = {2025},
      note         = {$A\&A$ 699, A255 (2025). 21 pages, 20 figures. Published in
                      Astronomy $\&$ Astrophysics},
      abstract     = {The Single-Mirror Small-Size Telescope (SST-1M)
                      stereoscopic system is composed of two Imaging Atmospheric
                      Cherenkov Telescopes (IACTs) designed to deliver optimal
                      performance for gamma-ray astronomy in the multi-TeV energy
                      range. It features a 4-m diameter tessellated mirror dish
                      and an innovative SiPM-based camera. Its optical system
                      features a 4-m diameter spherical mirror dish based on the
                      Davies-Cotton design, maintaining a good image quality over
                      a large field of view (FoV), while minimizing optical
                      aberrations. In 2022, two SST-1M telescopes were installed
                      at the Ondřejov Observatory, Czech Republic at an altitude
                      of 510 meters above sea level, collecting data for
                      commissioning and astronomical observations since then. We
                      present the first SST-1M observations of the Crab Nebula,
                      conducted between September 2023 and March 2024 in both mono
                      and stereoscopic modes. During this observation period, 46
                      hours for the SST-1M-1 and 52 hours for the SST-1M-2 were
                      collected (of which 33 hours were in stereoscopic mode). In
                      this work, we used the Crab Nebula observation to validate
                      the expected performance of the instrument, as evaluated by
                      Monte Carlo (MC) simulations that were carefully tuned to
                      account for instrumental and atmospheric effects. We
                      determined that the energy threshold at the analysis level
                      for the zenith angles below 30° is 1 TeV for mono mode and
                      1.3 TeV for stereo mode. The energy and angular resolutions
                      were approximately $20\%$ and 0.18° for mono mode and
                      $10\%$ and 0.10° for stereo mode, respectively. We present
                      an off-axis performance assessment of the instrument and a
                      detailed study of the systematic uncertainties. The full
                      simulation results for the telescope and its camera are
                      compared to the data for the first time, enabling a deeper
                      understanding of the SST-1M array performance.Key words:
                      instrumentation: detectors / methods: data analysis / gamma
                      rays: general / ISM: individual objects: Crab Nebula},
      cin          = {$Z_CTAM$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_CTAM-20250201$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613)},
      pid          = {G:(DE-HGF)POF4-613},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)25},
      eprint       = {2506.01733},
      howpublished = {arXiv:2506.01733},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2506.01733;\%\%$},
      doi          = {10.3204/PUBDB-2026-00224},
      url          = {https://bib-pubdb1.desy.de/record/643477},
}