Extreme blazars observed with MAGIC: second catalog release. SOUZA, Vitor de; SANTOS, Edivaldo Moura; VIANA, Aion.
Abstract: Extremely high-peaked BL Lac objects-also named extreme blazars-are among the most energetic and persistent extragalactic accelerators in the Universe, defined by a synchrotron emission peaking above 1017 Hz in X-rays. Such emission is then reprocessed and produces radiation extending deeply into very-high-energy (VHE; energy E > 100 GeV) gamma-rays. Observations in this energy band-optimally investigated by the Imaging Air-Shower Cherenkov telescopes-are crucial for probing the physical processes that drive their extreme behavior. This study extends our investigation of extreme blazars in the VHE gamma-ray range, providing a second new mini-catalog of sources observed by the MAGIC telescopes. We report on the monitoring of seven targets between 2017 and 2025, including four newly observed sources and three that have been part of long-term observation campaigns, for a total of approximately 338 hr of observations. The analysis of MAGIC data reveals two new VHE detections of extreme blazars, along with three additional sources showing hints of VHE emission. Joint observations of MAGIC and the first Large-Sized Telescope (LST-1) also confirmed a new VHE extreme blazar. Our results are complemented by simultaneous multiwavelength observations in other energy bands, including optical-UV, X-rays, and high-energy gamma-rays (100 MeV < E < 100 GeV). We confirm typical behavior of extreme blazars, such as a modest variability and a ?harder-when-brighter? trend in X-rays across the sample. This new set increases the population of extreme blazars, and their broadband analysis confirms the physical properties of these extreme sources.
Astrophysical Journal
v. 1002, n. 2, 138-1-138-23, May 2026. - Ano: 2026
Fator de Impacto: 5,4
@article={003305491,author = {SOUZA, Vitor de; SANTOS, Edivaldo Moura; VIANA, Aion.},title={Extreme blazars observed with MAGIC: second catalog release},journal={Astrophysical Journal},note={v. 1002, n. 2, 138-1-138-23, May 2026.},year={2026}}
We use cookies on this site for a better browsing experience. By accessing the website, you agree to our policy on the use of cookies. More information about our Privacy Policy.
This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
Cookie
Duration
Description
cookielawinfo-checkbox-analytics
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional
11 months
The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance
11 months
This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy
11 months
The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Abstract: Extremely high-peaked BL Lac objects-also named extreme blazars-are among the most energetic and persistent extragalactic accelerators in the Universe, defined by a synchrotron emission peaking above 1017 Hz in X-rays. Such emission is then reprocessed and produces radiation extending deeply into very-high-energy (VHE; energy E > 100 GeV) gamma-rays. Observations in this energy band-optimally investigated by the Imaging Air-Shower Cherenkov telescopes-are crucial for probing the physical processes that drive their extreme behavior. This study extends our investigation of extreme blazars in the VHE gamma-ray range, providing a second new mini-catalog of sources observed by the MAGIC telescopes. We report on the monitoring of seven targets between 2017 and 2025, including four newly observed sources and three that have been part of long-term observation campaigns, for a total of approximately 338 hr of observations. The analysis of MAGIC data reveals two new VHE detections of extreme blazars, along with three additional sources showing hints of VHE emission. Joint observations of MAGIC and the first Large-Sized Telescope (LST-1) also confirmed a new VHE extreme blazar. Our results are complemented by simultaneous multiwavelength observations in other energy bands, including optical-UV, X-rays, and high-energy gamma-rays (100 MeV < E < 100 GeV). We confirm typical behavior of extreme blazars, such as a modest variability and a ?harder-when-brighter? trend in X-rays across the sample. This new set increases the population of extreme blazars, and their broadband analysis confirms the physical properties of these extreme sources.
@article={003305491,author = {SOUZA, Vitor de; SANTOS, Edivaldo Moura; VIANA, Aion.},title={Extreme blazars observed with MAGIC: second catalog release},journal={Astrophysical Journal},note={v. 1002, n. 2, 138-1-138-23, May 2026.},year={2026}}