Lorentz invariance violation search with the Cherenkov Telescope Array Observatory Large-Sized Telescope
The fast variability of very-high energy (VHE) sources such as pulsars, gamma rays bursts (GRBs) or flares of active galactic nuclei (AGN) can be used to detect or constrain Lorentz invariance violation (LIV) by measuring lags in the arrival time of VHE photons. However, an important source of uncertainty arises from processes within the source that may induce intrinsic photon delays. Combining observations of different sources allows us to probe higher energy scales when LIV effects become relevant as well as to distinguish LIV-induced lags from intrinsic effects. We present the results of a standardized analysis performed on all AGN observations carried out by the first Large-Sized Telescope (LST-1) of CTAO. This analysis includes a general search of intra-night variability in archive observing nights that show significant excesses for the target candidates. The observing nights selected for LIV searches are then combined together to extract limits to the characteristic energies at which the LIV effect is expected to be significant. Finally, similar analysis have been performed on relevant data from other major imaging atmospheric Cherenkov telescopes, H.E.S.S., MAGIC and VERITAS, in order to combine all the data sets to extract combined limits that constrain one of the LIV effects.
Authors
- Sami Caroff (ORCID: https://orcid.org/0000-0002-1103-130X)
- Cyann Plard
Institutions
- Centre National de la Recherche Scientifique (FR)
- Laboratoire d’Annecy de Physique des Particules (FR)
- Université Savoie Mont Blanc (FR)
Publication Details
- Published
- 2025-09-24
- DOI
- https://doi.org/10.22323/1.501.0808
- Primary Topic
- Noncommutative and Quantum Gravity Theories
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- Sveučilište u Zagrebu
- Comunidad de Madrid
- Ministerio de Ciencia, Innovación y Universidades
- Centres de Recerca de Catalunya
- European Commission
- Deutsche Forschungsgemeinschaft
- Ministry of Education, Culture, Sports, Science and Technology
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Bundesministerium für Bildung und Forschung
- Generalitat de Catalunya
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Max-Planck-Gesellschaft
- Narodowe Centrum Nauki
- Hrvatska Zaklada za Znanost
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Fundação Araucária
- Centre National de la Recherche Scientifique
- Ministerio de Ciencia e Innovación
- Istituto Nazionale di Astrofisica
- Sveučilište Josipa Jurja Strossmayera u Osijeku
- Junta de Andalucía
- Ministério da Ciência, Tecnologia, Inovações e Comunicações
- Istituto Nazionale di Fisica Nucleare
- Japan Society for the Promotion of Science
- Consejo Superior de Investigaciones Científicas
- Staatssekretariat für Bildung, Forschung und Innovation
- European Regional Development Fund
- Agencia Estatal de Investigación
- Institut National de Physique Nucléaire et de Physique des Particules
- Institute for Cosmic Ray Research, University of Tokyo