{"paper":{"title":"Hard X-ray Variability of AGN","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2, 2), (2) Observatoire Astronomique de l'Universite de Geneve, 3), (3) CSST/UMBC, (4) ASD NASA/GSFC), G. Wendt (1) ((1) ISDC, J. Tueller (4), N. Gehrels (4), S. D. Barthelmy (4), S. Soldi (1, T.J.-L. Courvoisier (1, V. Beckmann (1","submitted_at":"2007-09-14T08:53:23Z","abstract_excerpt":"Aims: Active Galactic Nuclei are known to be variable throughout the electromagnetic spectrum. An energy domain poorly studied in this respect is the hard X-ray range above 20 keV.\n  Methods: The first 9 months of the Swift/BAT all-sky survey are used to study the 14 - 195 keV variability of the 44 brightest AGN. The sources have been selected due to their detection significance of >10 sigma. We tested the variability using a maximum likelihood estimator and by analysing the structure function.\n  Results: Probing different time scales, it appears that the absorbed AGN are more variable than th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0709.2230","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}