{"paper":{"title":"Triggering the Untriggered: The First Einstein Probe-Detected Gamma-Ray Burst 240219A and Its Implications","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alberto Javier Castro-Tirado, Arne Rau, Bin-Bin Zhang, Bing Zhang, Chen Zhang, Daming Wei, Dong Xu, Dongyue Li, Eleonora Troja, Erik Kuulkers, Giancarlo Ghirlanda, He Gao, Hui Sun, Jia-Yu Mou, Jie An, Johan P.U. Fynbo, Jun Yang, Li An, Luigi Piro, Muskan Yadav, Paul O'Brien, Peter Jonker, Qing-Hui Lao, Qinyu Wu, Rob Eyles-Ferris, Run-Chao Chen, Shao-Yu Fu, Shashi B. Pandey, Shuai-Qing Jiang, Shuang-Nan Zhang, Varun, Weihua Lei, Weimin Yuan, Wei Xie, Xiao-Fei Dong, Xing Gao, Xing Liu, Xin Pan, Xue-Feng Wu, Ya-Hui Jiang, Yashaswi Julakanti, Yi-Han Iris Yin, Yi-Jing Chen, Yi-Xuan Shao, Yong-Feng Huang, You-Dong Hu, Yuan Liu, Yu-Han Yang, Yun-Wei Yu, Zhi-Xing Ling, Zhou Fan, Zi-Pei Zhu","submitted_at":"2024-07-14T10:56:46Z","abstract_excerpt":"The Einstein Probe (EP) achieved its first detection and localization of a bright X-ray flare, EP240219a, on 2024 February 19, during its commissioning phase. Subsequent targeted searches triggered by the EP240219a alert identified a faint, untriggered gamma-ray burst (GRB) in the archived data of Fermi Gamma-ray Burst Monitor (GBM), Swift Burst Alert Telescope (BAT), and Insight-HXMT/HE. The EP Wide-field X-ray Telescope (WXT) light curve reveals a long duration of approximately 160 s with a slow decay, whereas the Fermi/GBM light curve shows a total duration of approximately 70 s. The peak i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.10156","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/2407.10156/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"}