Year: 2025
Type: conference-paper
Abstract: Markarian 421 (Mrk 421) is the closest and one of the brightest high-frequency peaked blazars, located at a redshift of z = 0.031. It is a strong source of gamma rays, and its broadband emission has been extensively studied over the years through multi-wavelength observations. Mrk 421 has been the target of an observational campaign from January to May 2024, with 23 nights of observation conducted by the SST-1M telescopes – two single-mirror, small-size Cherenkov telescopes at the Ondřejov Observatory, Czech Republic. These telescopes operate in mono and stereoscopic modes, utilizing the imaging atmospheric Cherenkov technique to detect very high-energy gamma rays in the 1–300 TeV energy range. Using about 32.92 hours of data collected by the telescopes in stereo mode, we find that the gamma-ray spectrum above 1 TeV is well described by a power-law function with an index of 3.24 ± 0.26. In this work, we present our recent SST-1M stereo observations, data analysis, and the results of preliminary physical modeling of Mrk 421’s emission mechanisms.
DOI: 10.22323/1.501.0776
Authors: Srija Reddy Muthyala, Anabella Araudo, Cyril Martin Alispach, Matteo Balbo, Vasyl Beshley, Jiri Blazek, Jerzy Borkowski, Stella Boula, Tomasz Bulik, Franck Cadoux, Sabrina Casanova, Asen Christov, Jiří Chudoba, Ladislav Chytka, Patrik Čechvala, Premysl Dedic, Yannick Favre, Markus Garczarczyk, Laetitia Gibaud, Tomasz Gieras, Ernest Glowacki, Petr Hamal, Matthieu Heller, Miroslav Hrabovsky, Petr Janecek, Martin Jelinek, Vlastimil Jilek, Jakub Jurysek, Vladimir Karas, Bastien Lacave, Étienne Lyard, Emil Mach, Dusan Mandat, Stanislav Michal, Jerzy Michalowksi, Michal Miron, Rafal Moderski, Teresa Montaruli, Adam Muraczewski, Ana Laura Muller, Krzysztof Nalewajski, Andrii Nagai, Dominik Neise, Jacek Niemiec, Marek Nikolajuk, Vladimír Novotný, Miroslav Palatka, Miroslav Pech, Michael Prouza, Petr Schovanek, Vitalii Sliusar, Lukasz Stawarz, Ronny Sternberger, Magdalena Stodulska, Jan Strobl, Pawel Swierk, Jacek Świerblewski, Thomas Tavernier, Petr Travnicek, Michał Ostrowski, Isaac Troyano Pujadas, Jakub Vicha, Domenico della Volpe, Roland Walter, Wojciech Marek, Krzysztof Ziȩtara
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414530833
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