{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/statistical-properties-of-flux-variations-in","title":"Statistical properties of flux variations in blazar light curves at GeV and TeV energies","arxiv_id":"2110.14797","date":"2021-10-27","proceeding":null,"authors":["Sarah M. Wagner","Paul R. Burd","Daniela Dorner","Karl Mannheim","Sara Buson","Andrea Gokus","Greg Madejski","Jeffrey D. Scargle","Axel Arbet-Engels","Dominik Baack","Matteo Balbo","Adrian Biland","Thomas Bretz","Jens Buss","Laura Eisenberger","Dominik Elsaesser","Dorothee Hildebrand","Roman Iotov","Adelina Kalenski","Dominik Neise","Maximilian Noethe","Aleksander Paravac","Wolfgang Rhode","Bernd Schleicher","Vitalii Sliusar","Roland Walter"],"abstract":"Despite numerous detections of individual flares, the physical origin of the rapid variability observed from blazars remains uncertain. Using Bayesian blocks and the Eisenstein-Hut HOP algorithm, we characterize flux variations of high significance in the $\\gamma$-ray light curves of two samples of blazars. Daily binned long-term light curves of TeV-bright blazars observed with the First G-APD Cherenkov Telescope (FACT) are compared to those of GeV-bright blazars observed with the Large Area Telescope on board the $Fermi$ Gamma-ray Space Telescope ($Fermi$-LAT). We find no evidence for systematic asymmetry of the flux variations based on the derived rise and decay time scales. Additionally, we show that the daily-binned blazar light curves can be described by an exponential stochastic Ornstein-Uhlenbeck (OU) process with parameters depending on energy. Our analysis suggests that the flux variability in both samples is a superposition of faster fluctuations. This is, for instance, challenging to explain by shock-acceleration but expected for magnetic reconnection.","url_abs":"https://arxiv.org/abs/2110.14797v2","url_pdf":"https://arxiv.org/pdf/2110.14797v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"statistical-properties-of-flux-variations-in","repo_url":"https://github.com/PRBurd/astro-wue","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null},{"paper_slug":"statistical-properties-of-flux-variations-in","repo_url":"https://github.com/swagner-astro/lightcurves","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}