{"paper":{"title":"Evidence for an FU Orionis-like Outburst from a Classical T Tauri Star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"4), Adam A. Miller (1), Alexei V. Filippenko (1), Barbara Rojas-Ayala (3), Christopher R. Klein (1) ((1) UC Berkeley (2) CIT (3) Cornell (4) LBNL (5) UToronto (6) COO/CIT), Dan McKenna (6), David Hale (6), Dovi Poznanski (1, Eran O. Ofek (2), Gustavo Rahmer (6), Io K. W. Kleiser (1), Janet Jacobsen (4), Jeffrey M. Silverman (1), Jeff Zolkower (6), John Henning (6), Joshua S. Bloom (1), Kevin R. Covey (3), Khanh Bui (6), Lynne A. Hillenbrand (2), Mansi M. Kasliwal (2), Nicholas M. Law (5), Peter Nugent (4), Philip S. Muirhead (3), Richard G. Dekany (6), Richard Walters (6), Robert M. Quimby (2), Roger Smith (6), S. Bradley Cenko (1), Shrinivas R. Kulkarni (2), Viswa Velur (6)","submitted_at":"2010-11-09T12:42:54Z","abstract_excerpt":"We present pre- and post-outburst observations of the new FU Orionis-like young stellar object PTF 10qpf (also known as LkHa 188-G4 and HBC 722). Prior to this outburst, LkHa 188-G4 was classified as a classical T Tauri star on the basis of its optical emission-line spectrum superposed on a K8-type photosphere, and its photometric variability. The mid-infrared spectral index of LkHa 188-G4 indicates a Class II-type object. LkHa 188-G4 exhibited a steady rise by ~1 mag over ~11 months starting in Aug. 2009, before a subsequent more abrupt rise of > 3 mag on a time scale of ~2 months. Observatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.2063","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"}