Extensive analysis of γ-ray periodicity in jetted AGNs from the 4FGL catalogue using <i>Fermi</i>-LAT observations
ABSTRACT The quest to uncover periodic patterns within the $\gamma$-ray emissions of jetted active galactic nuclei (AGNs) has recently emerged as a focal point in astrophysics. One of the primary challenges has been the necessity for prolonged exposures in the $\gamma$-ray energy band. In our investigation, we leverage 12 yr’s worth of observations from the Fermi-LAT to systematically explore periodicity across 1492 jetted AGNs catalogued in 4FGL, representing the largest sample analysed to date. Our analysis involves a robust pipeline employing nine distinct techniques designed to detect potential periodic emissions within their $\gamma$-rays. We note that 24 objects with previous hints of periodicity are deliberately excluded in this work since they were reanalysed in a dedicated paper using a similar methodology. Using this thorough approach, we do not find any evidence for periodic signals in the 1492 jetted AGNs $\gamma$-ray light curves analysed here.
Authors
- A. Domínguez (ORCID: https://orcid.org/0000-0002-3433-4610)
- S. Buson (ORCID: https://orcid.org/0000-0002-3308-324X)
- Pablo Peñil (ORCID: https://orcid.org/0000-0003-3741-9764)
- S. Adhikari (ORCID: https://orcid.org/0009-0006-1029-1026)
- M. Ajello (ORCID: https://orcid.org/0000-0002-6584-1703)
Institutions
- Universidad Complutense de Madrid (ES)
- University of Würzburg (DE)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Clemson University (US)
Publication Details
- Journal
- Monthly Notices of the Royal Astronomical Society
- Published
- 2025-09-23
- DOI
- https://doi.org/10.1093/mnras/staf1598
- Citations
- 1
- Primary Topic
- Astrophysics and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- U.S. Department of Energy
- National Aeronautics and Space Administration
- Deutsche Forschungsgemeinschaft
- Ministry of Education, Culture, Sports, Science and Technology
- Universidad Complutense de Madrid
- Nuclear Safety and Security Commission
- Agenzia Spaziale Italiana
- Vetenskapsrådet
- Centre National de la Recherche Scientifique
- Istituto Nazionale di Astrofisica
- High Energy Accelerator Research Organization
- Istituto Nazionale di Fisica Nucleare
- Japan Aerospace Exploration Agency
- Agencia Estatal de Investigación
- Institut National de Physique Nucléaire et de Physique des Particules