{"paper":{"title":"Real-time Discovery of AT2020xnd: A Fast, Luminous Ultraviolet Transient with Minimal Radioactive Ejecta","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Anna Y. Q. Ho (Berkeley), Christoffer Fremling (Caltech), Claudia P. Guti\\'errez (FINCA/Tuorla), Cosimo Inserram (Cardiff), Daniel A. Perley (LJMU), Dmitry A. Duev (Caltech), Eric C. Bellm (UW), Erik C. Kool (Stockholm), Frank J. Masci (IPAC), G. C. Anupama (IIA), Harsh Kumar (IIT Bombay), James D. Neill (Caltech), Jesper Sollerman (Stockholm), Joannes van Roestel (Caltech), Joseph P. Anderson (ESO), Llu\\'is Galbany (UAB), Mansi M. Kasliwal (Caltech), Mariusz Gromadzki (Warsaw), Matthew J. Graham (Caltech), Matt Nicholl (Birmingham), Miika Pursiainen (DTU), Nada Ihanec (Warsaw), Philip Wiseman (Southampton), Richard Walters (Caltech), Russ R. Laher (IPAC), S. R. Kulkarni (Caltech), Steve Schulze (Stockholm), Sudhanshu Barway (IIA), Ting-Wan Chen (Stockholm), Varun Bhalerao (IIT Bombay), Yashvi Sharma (Caltech), Yuhan Yao (Caltech)","submitted_at":"2021-03-02T19:00:01Z","abstract_excerpt":"The many unusual properties of the enigmatic AT2018cow suggested that at least some subset of the empirical class of fast blue optical transients (FBOTs) represents a genuinely new astrophysical phenomenon. Unfortunately, the intrinsic rarity and fleeting nature of these events have made it difficult to identify additional examples early enough to acquire the observations necessary to constrain theoretical models. We present here the Zwicky Transient Facility discovery of AT2020xnd (ZTF20acigmel, the \"Camel\") at z=0.243, the first unambiguous AT2018cow analog to be found and confirmed in real "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.01968","kind":"arxiv","version":3},"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/2103.01968/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"}