SST-1M observation of Markarian 421
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.
Authors
- F. Cadoux
- Anabella Araudo (ORCID: https://orcid.org/0000-0001-7605-5786)
- Matteo Balbo (ORCID: https://orcid.org/0000-0002-6556-3344)
- R. Walter (ORCID: https://orcid.org/0000-0003-2362-4433)
- J. Borkowski (ORCID: https://orcid.org/0000-0002-1460-496X)
- Jiří Blažek (ORCID: https://orcid.org/0000-0002-5870-8947)
- Vasyl Beshley (ORCID: https://orcid.org/0000-0002-2688-0224)
- S. Casanova (ORCID: https://orcid.org/0000-0002-6144-9122)
- Stella Boula (ORCID: https://orcid.org/0000-0001-7905-6928)
- M. Jelínek (ORCID: https://orcid.org/0000-0003-3922-7416)
- M. Ostrowski (ORCID: https://orcid.org/0000-0002-9199-7031)
- A. Christov (ORCID: https://orcid.org/0000-0001-8121-5860)
- Cyril Martin Alispach
- E. Mach (ORCID: https://orcid.org/0000-0002-9259-586X)
- Paweł Świerk
- M. Hrabovský (ORCID: https://orcid.org/0000-0003-4223-7316)
- A. Nagai (ORCID: https://orcid.org/0000-0002-7150-4527)
- P. Trávnı́ček (ORCID: https://orcid.org/0000-0002-1655-9584)
- Ł. Stawarz
- M. Nikołajuk (ORCID: https://orcid.org/0000-0003-4075-6745)
- I. Troyano Pujadas
- J. Vícha (ORCID: https://orcid.org/0000-0002-7945-3605)
- L. Chytka (ORCID: https://orcid.org/0000-0001-5741-259X)
- Vladimír Novotný (ORCID: https://orcid.org/0000-0002-4319-4541)
- V. Karas (ORCID: https://orcid.org/0000-0002-5760-0459)
- M. Palatka (ORCID: https://orcid.org/0000-0003-2061-6059)
- Vitalii Sliusar (ORCID: https://orcid.org/0000-0002-4387-9372)
- M. Stodulska (ORCID: https://orcid.org/0000-0002-4477-8143)
- J. Štrobl (ORCID: https://orcid.org/0000-0002-4147-2878)
- J. Niemiec (ORCID: https://orcid.org/0000-0001-6036-8569)
- Matthieu Heller (ORCID: https://orcid.org/0000-0003-1215-0148)
- R. Moderski (ORCID: https://orcid.org/0000-0002-8663-3882)
- R. Sternberger
- L. Gibaud (ORCID: https://orcid.org/0000-0001-7765-8271)
- D. della Volpe (ORCID: https://orcid.org/0000-0001-8530-7447)
- Patrik Čechvala
- M. Garczarczyk (ORCID: https://orcid.org/0000-0002-0445-4566)
- T. Montaruli (ORCID: https://orcid.org/0000-0001-5014-2152)
- Jakub Jurýšek (ORCID: https://orcid.org/0000-0002-3130-4168)
- Dominik Neise
- M. Prouza (ORCID: https://orcid.org/0000-0002-3238-9597)
- T. Bulik (ORCID: https://orcid.org/0000-0003-2045-4803)
- Krzysztof Ziȩtara
- Ana Laura Muller
- E. Lyard
- Tomasz Gieras
- Adam Muraczewski
- Srija Reddy Muthyala
- Krzysztof Nalewajski
- Jerzy Michalowksi
- J. Chudoba (ORCID: https://orcid.org/0000-0002-6425-2579)
- Wojciech Marek
- Stanislav Michal (ORCID: https://orcid.org/0000-0001-6563-1573)
- Yannick Favre
- Jacek Świerblewski (ORCID: https://orcid.org/0000-0003-4005-3863)
- Miroslav Pech
- Petr Janecek
- Dusan Mandat
- Petr Hamal
- Vlastimil Jílek (ORCID: https://orcid.org/0000-0001-5774-7285)
- T. Tavernier
- Petr Schovánek (ORCID: https://orcid.org/0000-0002-5344-7645)
- Premysl Dedic (ORCID: https://orcid.org/0000-0001-7805-4373)
- Bastien Lacave
- Ernest Glowacki
- Michal Miron
Publication Details
- Published
- 2025-09-24
- DOI
- https://doi.org/10.22323/1.501.0776
- Primary Topic
- Astronomical Observations and Instrumentation
- Type
- article
- Field-Weighted Citation Impact
- 0.00