{"paper":{"title":"Massive stars exploding in a He-rich circumstellar medium. IV. Transitional Type Ibn Supernovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Harutyunyan, A. Pastorello, C. Inserra, D. E. Wright, D. J. Rich, D. Y. Tsvetkov, E. Cappellaro, E. S. Gorbovskoy, F. Bufano, F. Huang, J. Sollerman, L. Magill, L. Tomasella, L. Zampieri, M. D. Stritzinger, M. Ergon, M. Fraser, M. Miluzio, M. T. Botticella, M. Turatto, N. Morrell, P. J. Brown, P. Ochner, R. Kotak, S. Benetti, S. J. Smartt, S. Spiro, S. Taubenberger, S. Valenti, T. Zhang, V. M. Lipunov, V. V. Yurkov, X. Wang","submitted_at":"2015-02-17T16:13:01Z","abstract_excerpt":"We present ultraviolet, optical and near-infrared data of the Type Ibn supernovae (SNe) 2010al and 2011hw. SN 2010al reaches an absolute magnitude at peak of M(R) = -18.86 +- 0.21. Its early light curve shows similarities with normal SNe Ib, with a rise to maximum slower than most SNe Ibn. The spectra are dominated by a blue continuum at early stages, with narrow P-Cygni He I lines indicating the presence of a slow-moving, He-rich circumstellar medium. At later epochs the spectra well match those of the prototypical SN Ibn 2006jc, although the broader lines suggest that a significant amount of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04946","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"}