{"paper":{"title":"Discovery of a new Soft Gamma Repeater: SGR J0418+5729","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A.J. van der Horst, A.L. Watts, A. Pe'er, A. von Kienlin, C.A. Meegan, C.A. Wilson-Hodge, C. Kouveliotou, C.R. Gelino, D.D. Frederiks, D.M. Gelino, D.M. Palmer, D. Svinkin, E. Gogus, E.P. Mazets, E. Ramirez-Ruiz, H.A. Krimm, J.E. McEnery, J. Granot, J.R. Cummings, K. Hurley, M.H. Finger, M.S. Briggs, M. van der Klis, M.V. Ulanov, N. Gehrels, P.M. Woods, P.P. Oleynik, R.L. Aptekar, S.D. Barthelmy, S. Golenetskii, S. Wachter, V. Connaughton, V.D. Pal'shin, Y. Kaneko","submitted_at":"2009-11-30T05:28:15Z","abstract_excerpt":"On 2009 June 5, the Gamma-ray Burst Monitor (GBM) onboard the Fermi Gamma-ray Space Telescope triggered on two short, and relatively dim bursts with spectral properties similar to Soft Gamma Repeater (SGR) bursts. Independent localizations of the bursts by triangulation with the Konus-RF and with the Swift satellite, confirmed their origin from the same, previously unknown, source. The subsequent discovery of X-ray pulsations with the Rossi X-ray Timing Explorer (RXTE), confirmed the magnetar nature of the new source, SGR J0418+5729. We describe here the Fermi/GBM observations, the discovery a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.5544","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"}