{"paper":{"title":"Discovery of a bright transient ultraluminous X-ray source Suzaku J1305-4931 in NGC 4945","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"2), (2) Shibaura Institute of Technology, 3), (3) Department of Physics, (4) Department of Physics, (5) Department of Physics, Aya Kubota (1, Carnegie Mellon University, Gulab C. Dewangan (4), Hiroshima University), Kazuo Makishima (1, Naoki Isobe (1), Poshak Gandhi (1), Richard E. Griffiths (4), RIKEN, Takeshi Itoh (3) Tsunuefumi Mizuno (5) ((1) Cosmic Radiation Laboratory, University of Tokyo","submitted_at":"2007-08-14T05:29:21Z","abstract_excerpt":"This paper reports the discovery of a bright X-ray transient source, Suzaku J1305-4913, in the south-west arm of the nearby Seyfert II galaxy NGC 4945. It was detected at a 0.5 -- 10 keV flux of $2.2 \\times 10^{-12}$ erg cm$^{-2}$ s$^{-1}$ during the Suzaku observation conducted on 2006 January 15 -- 17, but was undetectable in a shorter observation on 2005 August 22 --23, with an upper limit of $1.7 \\times 10^{-14}$ erg cm$^{-2}$ s$^{-1}$ (90% confidence level). At a distance of 3.7 Mpc, the bolometric luminosity of the source becomes $L_{\\rm bol} = 4.4 \\times 10^{39} \\alpha$ erg s$^{-1}$, wh"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0708.1804","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"}