{"paper":{"title":"SN 2002cx: The Most Peculiar Known Type Ia Supernova","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"(2) Caltech, 3), (3) CfA, (4) STSCI, 5), (5) UCD, (6) UCSC, (7) SIRTF), Alexei V. Filippenko (1), Chris Fassnacht (4, Edo Berger (2), Gordon Squires (7) ((1) UCB, Graeme H. Smith (6), Michael L. Calkins (3), Perry Berlind (3), Peter Challis (3), Robert A. Simcoe (2), Robert P. Kirshner (3), Ryan Chornock (1), Saurabh Jha (1, Thomas Matheson (3), Wallace L. W. Sargent (2), Weidong Li (1)","submitted_at":"2003-01-22T02:18:43Z","abstract_excerpt":"We present photometric and spectroscopic observations of supernova (SN) 2002cx, which reveal it to be unique among all observed type Ia supernovae (SNe Ia). SN 2002cx exhibits a SN 1991T-like premaximum spectrum, a SN 1991bg-like luminosity, and expansion velocities roughly half those of normal SNe Ia. Photometrically, SN 2002cx has a broad peak in the $R$ band and a plateau phase in the $I$ band, and slow late-time decline. The $(B - V)$ color evolution is nearly normal, but the $(V - R)$ and $(V - I)$ colors are very red. Early-time spectra of SN 2002cx evolve very quickly and are dominated "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0301428","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":""},"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"}