{"paper":{"title":"Outburst and Post-Outburst Active Phase of the Black Hole X-ray Binary V4641 Sgr in 2002","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Miyashita, B. Monard, C. Bailyn, C. Markwardt, D. West, G. Masi, J. H. Swank, J. Macquart, K. Tanabe, K. Torii, M. Linnolt, M. Uemura, P. Nelson, R. Ishioka, R. Santallo, R. Sault, R. Stubbings, S. Kiyota, T. Kato, T. Richards, T. Scarmato, Y. Sano","submitted_at":"2003-08-09T08:57:04Z","abstract_excerpt":"The black hole X-ray binary V4641 Sgr experienced an outburst in 2002 May which was detected at X-ray, optical, and radio wavelengths. The outburst lasted for only 6 days, but the object remained active for the next several months. Here we report on the detailed properties of light curves during the outburst and the post-outburst active phase. We reveal that rapid optical variations of ~100 s became more prominent when a thermal flare weakened and the optical spectrum flattened in the Ic, Rc, and V-band region. In conjunction with the flat spectrum in the radio range, this strongly indicates t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0308154","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"}