{"paper":{"title":"ZTF20aajnksq (AT2020blt): A Fast Optical Transient at $z \\approx 2.9$ With No Detected Gamma-Ray Burst Counterpart","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"(10) IPAC, (11) CIERA, 12), (12) Adler, (13) OKC Astronomy), (2) LJMU, (3) NASA Goddard, 4), (4) UMD, (5) DIRAC Institute, (6) COO, 7), (7) eScience Institute, (8) OKC Physics, (9) Kavli Institute UCSB, A. A. Miller (11, Alexandre Delacroix (6), Anna Y. Q. Ho (1), Ariel Goobar (8), Ben Rusholme (10), Christoffer Fremling (1), Daniel A. Goldstein (1), Daniel A. Perley (2), David Hale (6), David L. Shupe (10), Dmitry A. Duev (1), Eric C. Bellm (5), Frank J. Masci (10), Igor Andreoni (1), James D. Neill (1), Jan van Roestel (1) ((1) Caltech, Jesper Sollerman (13), Kishalay De (1), Leo P. Singer (3), Mansi M. Kasliwal (1), Matthew Graham (1), Paz Beniamini (1), Reed Riddle (6), Richard Dekany (6), Roger Smith (6), Russ R. Laher (10), S. Bradley Cenko (3, S. R. Kulkarni (1), Thomas Kupfer (9), V. Zach Golkhou (5","submitted_at":"2020-06-18T18:00:01Z","abstract_excerpt":"We present ZTF20aajnksq (AT2020blt), a fast-fading ($\\Delta r=2.4$ mag in $\\Delta t=1.3$ days) red ($g-r\\approx0.6$ mag) and luminous ($M_{1626}=-25.9$) optical transient at $z=2.9$ discovered by the Zwicky Transient Facility (ZTF). AT2020blt shares several features in common with afterglows to long-duration gamma-ray bursts (GRBs): (1) an optical light curve well-described by a broken power-law with a break at $t_\\mathrm{j}=1$ day (observer-frame); (2) a luminous $(L_X = 10^{46}$ $\\mathrm{erg}$ $\\mathrm{s}^{-1})$ X-ray counterpart; and (3) luminous ($L_\\nu = 4 \\times 10^{31}$ $\\mathrm{erg}$ $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.10761","kind":"arxiv","version":4},"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/2006.10761/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"}