{"paper":{"title":"A Bright Ultraviolet Excess in the Transitional 02es-like Type Ia Supernova 2019yvq","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"C. McCully, C. Pellegrino, D. A. Howell, D. Hiramatsu, D. J. Sand, E. Y. Hsiao, J. Burke, J. E. Andrews, K. A. Bostroem, Koichi Itagaki, L. Chomiuk, M. Shahbandeh, Nathan Smith, P. J. Brown, R. C. Amaro, S. K. Sarbadhicary, S. Valenti","submitted_at":"2021-01-16T01:41:31Z","abstract_excerpt":"We present photometric and spectroscopic observations of the nearby Type Ia SN 2019yvq, from its discovery $\\sim$1 day after explosion to $\\sim$100 days after its peak brightness. This SN exhibits several unusual features, most notably an extremely bright UV excess seen within $\\sim$5 days of its explosion. As seen in Swift UV data, this early excess outshines its \"peak\" brightness, making this object more extreme than other SNe with early UV/blue excesses (e.g. iPTF14atg and SN 2017cbv). In addition, it was underluminous ($M_B=-18.4$), relatively quickly declining ($\\Delta m_{15}(B)=1.35$), a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.06345","kind":"arxiv","version":1},"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/2101.06345/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"}