{"paper":{"title":"Swift monitoring of NGC 4151: Evidence for a Second X-ray/UV Reprocessing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Breeveld, A. J. Barth, A. V. Filippenko, B. M. Peterson, C. Done, D. A. Starkey, D. C. Leonard, D. Emmanoulopoulos, D. Grupe, E. Cackett, E. Dalla Bonta, E. Gardner, E. Romero-Colmenero, G. Ferland, G. Kriss, H. A. Krimm, H. A. Vogler, H. Netzer, H. Winkler, I. McHardy, J. Gelbord, J. Kennea, J. Nousek, K. Horne, K. Page, K. T. Korista, M. Bentz, M. Bottorff, M. Fausnaugh, M. Goad, M. Joner, M. Siegel, M. Vestergaard, N. Gehrels, P. Evans, R. Edelson, R. Figuera Jaimes, S. Connolly, S. Mathur, S. M. Crawford, S. Vaughan, T. Treu, W. N. Brandt, W. Zheng","submitted_at":"2017-03-20T18:11:10Z","abstract_excerpt":"Swift monitoring of NGC 4151 with ~6 hr sampling over a total of 69 days in early 2016 is used to construct light curves covering five bands in the X-rays (0.3-50 keV) and six in the ultraviolet (UV)/optical (1900-5500 A). The three hardest X-ray bands (>2.5 keV) are all strongly correlated with no measurable interband lag while the two softer bands show lower variability and weaker correlations. The UV/optical bands are significantly correlated with the X-rays, lagging ~3-4 days behind the hard X-rays. The variability within the UV/optical bands is also strongly correlated, with the UV appear"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.06901","kind":"arxiv","version":2},"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"}