{"paper":{"title":"Deepest view of AGN X-ray variability with the 7 Ms Chandra Deep Field-South survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"B. Luo, C. Vignali, F. E. Bauer, F. Vito, G. Yang, J. X. Wang, J. Y. Li, M. Paolillo, M. Y. Sun, S. F. Zhu, T. Liu, T. M. Hughes, W. N. Brandt, X. C. Zheng, X. W. Shu, Y. Q. Xue","submitted_at":"2017-10-12T04:02:51Z","abstract_excerpt":"We systematically analyze X-ray variability of active galactic nuclei (AGNs) in the 7~Ms \\textit{Chandra} Deep Field-South survey. On the longest timescale ($\\approx~17$ years), we find only weak (if any) dependence of X-ray variability amplitudes on energy bands or obscuration. We use four different power spectral density (PSD) models to fit the anti-correlation between normalized excess variance ($\\sigma^2_{\\rm nxv}$) and luminosity, and obtain a best-fit power law index $\\beta=1.16^{+0.05}_{-0.05}$ for the low-frequency part of AGN PSD. We also divide the whole light curves into 4 epochs in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.04358","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"}