Year: 2025
Type: conference-paper
Abstract: The Cherenkov Telescope Array Observatory (CTAO) will enable detailed studies of Active Galactic Nuclei (AGN) in the very-high-energy (VHE) regime, as the next-generation ground-based gamma-ray observatory, designed to enhance sensitivity and energy coverage (20 GeV - 300 TeV) over current Imaging Atmospheric Cherenkov Telescopes (IACTs). In the context of the CTAO Science Collaboration, within the AGN Population working group, we developed a variability-based strategy to improve predictions of AGNs detectable by CTAO, using Fermi-LAT data and normalized excess variance (NXS) as a tracer of flux variability. By extrapolating from 30-day to 3-day timescales, we expanded the sample of sources with short-timescale variability estimates from 87 to 407. This approach allows us to identify flaring and distant AGNs that are promising CTAO targets. The results are being used to support the CTAO extragalactic science program and will be included in an upcoming Consortium publication for the AGN Population collaboration.
DOI: 10.22323/1.501.0798
Institutions: Université Paris Cité, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Centre National de la Recherche Scientifique, Institut Universitaire de France, Université Paris-Saclay, Institut National de Physique Nucléaire et de Physique des Particules, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie, Universidade de São Paulo, University of Southern Denmark, Centre for Cosmology and Particle Physics Phenomenology, Universidad Complutense de Madrid, Ruhr University Bochum, Sorbonne Université, Laboratoire de Physique Nucléaire et de Hautes Énergies
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4414530547
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