{"paper":{"title":"SN 2014J at M82: I. A middle-class type Ia supernova by all spectroscopic metrics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. R. L\\'opez-S\\'anchez, C. Fari\\~na, E. A. Cooke, E. Baron, F. C. Riddick, H. Lietzen, I. Dom\\'inguez, I. Skillen, J. A. Rubi\\~no-Mart\\'in, J. I. Gonz\\'alez Hern\\'andez, J. McCormac, J. M\\'endez, L. Galbany, M. E. Moreno-Raya, M. Hamuy, M. Moll\\'a, O. Vaduvescu, P. Ruiz-Lapuente, P. Vallely, R. G\\'enova-Santos, R. Karjalainen, S. Catal\\'an, V. Tudor","submitted_at":"2015-10-22T12:20:06Z","abstract_excerpt":"We present the intensive spectroscopic follow up of the type Ia supernova (SN Ia) 2014J in the starburst galaxy M82. Twenty-seven optical spectra have been acquired from January 22nd to September 1st 2014 with the Isaac Newton (INT) and William Herschel (WHT) Telescopes. After correcting the observations for the recession velocity of M82 and for Milky Way and host galaxy extinction, we measured expansion velocities from spectral line blueshifts and pseudo-equivalent width of the strongest features in the spectra, which gives an idea on how elements are distributed within the ejecta. We positio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.06596","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"}