{"paper":{"title":"A mildly relativistic outflow from the energetic, fast-rising blue optical transient CSS161010 in a dwarf galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Baldeschi, A.J. Nayana, A. Meisner, A. Ridnaia, A. Zauderer, B. Shappee, B. Zhang, C. Esquivia, C. Frohmaier, C. Guidorzi, C.S. Kochanek, C. Ward, D. Caprioli, D.E. Reichart, D. Frederiks, D.J. Sand, D.L. Coppejans, D. Milisavljevic, D. Svinkin, E.R. Coughlin, G. Terreran, I.V. Chilingarian, K.D. Alexander, K. Hurley, K. Paterson, M. Bietenholz, M.C. Stroh, M. Drout, M. MacLeod, P. Chandra, P.E. Nugent, P. Lundqvist, R. Margutti, S. Valenti, S. Yang, T. Laskar, W. Fong, Y. Dong","submitted_at":"2020-03-23T19:27:40Z","abstract_excerpt":"We present X-ray and radio observations of the Fast Blue Optical Transient (FBOT) CRTS-CSS161010 J045834-081803 (CSS161010 hereafter) at t=69-531 days. CSS161010 shows luminous X-ray ($L_x\\sim5\\times 10^{39}\\,\\rm{erg\\,s^{-1}}$) and radio ($L_{\\nu}\\sim10^{29}\\,\\rm{erg\\,s^{-1}Hz^{-1}}$) emission. The radio emission peaked at ~100 days post transient explosion and rapidly decayed. We interpret these observations in the context of synchrotron emission from an expanding blastwave. CSS161010 launched a mildly relativistic outflow with velocity $\\Gamma\\beta c\\ge0.55c$ at ~100 days. This is faster tha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.10503","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/2003.10503/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"}