{"paper":{"title":"X-ray spectral shape variations in changing-look Seyfert galaxy SDSSJ155258+273728","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Chenwei Yang, Fu-Guo Xie, Liming Dou, Luming Sun, Ning Jiang, Su Yao, Tinggui Wang, Xinwen Shu, Xue-Bing Wu, Yanli Ai","submitted_at":"2019-11-30T09:38:44Z","abstract_excerpt":"We analyze the X-ray, optical, and mid-infrared data of a \"changing-look\" Seyfert galaxy \\sdssj15 at $z\\simeq0.086$. Over a period of one decade (2009 - 2018), its broad H$\\alpha$ line intensity increased by a factor of $\\sim$4. Meanwhile, the X-ray emission in 2014 as observed by \\chandra\\ was about five times brighter than that in 2010 by {\\it Suzaku}, and the corresponding emissions in V-band, mid-infrared W1 band brighten by $\\sim$ 0.18, 0.32 mag, respectively. Moreover, the absorption in X-rays is moderate and stable, i.e. ${\\rm N_{H}}\\sim 10^{21} {\\rm cm^{-2}}$, but the X-ray spectrum be"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.00164","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1912.00164/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}