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arxiv: 2602.00691 · v2 · pith:A7WXOCJ6new · submitted 2026-01-31 · 🌌 astro-ph.IM · astro-ph.HE

Prospects for the detection of gamma rays using Cherenkov telescopes enhanced by a ground array observatory

C. Alispach , A. Araudo , A. Bakalov\'a , M. Balbo , V. Beshley , J. Bla\v{z}ek , J. Borkowski , T. Bulik
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F. Cadoux S. Casanova A. Christov J. Chudoba L. Chytka P. \v{C}echvala P. D\v{e}dic Y. Favre M. Garczarczyk L. Gibaud T. Gieras E. G{\l}owacki P. Hamal M. Heller M. Hrabovsk\'y P. Jane\v{c}ek M. Jel\'inek V. J\'ilek J. Jury\v{s}ek V. Karas B. Lacave E. Lyard D. Mand\'at W. Marek S. Michal J. Micha{\l}owski M. Miro\'n R. Moderski T. Montaruli A. Muraczewski S. R. Muthyala A. L. M\"uller A. Nagai K. Nalewajski D. Neise J. Niemiec M. Niko{\l}ajuk V. Novotn\'y M. Ostrowski M. Palatka M. Pech M. Prouza P. Schov\'anek T. Schulz V. Sliusar J. Srba {\L}. Stawarz R. Sternberger M. Stodulska J. \'Swierblewski P. \'Swierk J. \v{S}trobl T. Tavernier P. Tr\'avn\'i\v{c}ek I. Troyano Pujadas J. V\'icha R. Walter K. Zi\c{e}tara (SST-1M Collaboration) R. Concei\c{c}\~ao L. Gibilisco M. Pimenta B. Tom\'e
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classification 🌌 astro-ph.IM astro-ph.HE
keywords arraygammaobservatorycherenkovhybridsst-1mtelescopesabove
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We study through detailed simulated data and their optimized analysis the expected performance of the Single-Mirror Small-Size imaging atmospheric Cherenkov Telescopes (SST-1M) potentially located inside a high-altitude array of Water-Cherenkov Detectors (WCDs) inspired by the current foreseen design of the Southern Wide-field Gamma-ray Observatory (SWGO). For such a hybrid setup, we show an improvement in the flux sensitivity above 10 TeV by about 60% for monocular and 30% for stereoscopic SST-1M observation, due to the improved gamma/hadron separation when additional parameters from the WCD array are used. We also discuss further benefits of the hybrid gamma observatory concept and its technical challenges.

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