{"paper":{"title":"Massive stars exploding in a He-rich circumstellar medium. XI. Diverse evolution of five Ibn SNe 2020nxt, 2020taz, 2021bbv, 2023utc and 2024aej","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"A. Fiore, A. Pastorello, A. Reguitti, B. Wang, C.-C. Lin, C. McCully, C. Pellegrino, C.P. Guti'errez, C.-Y. Wu, D. Andrew Howell, D. Hiramatsu, E.A. Magnier, E. Cappellaro, E. Kankare, E. Karamehmetoglu, E. Padilla Gonzalez, F.-Z. Guo, G.-C. Li, G.-J. Wang, G. Terreran, G. Valerin, H. Gao, J. Farah, J.-J. Zhang, J. Mo, K.C. Chambers, L. Tartaglia, L. Tomasella, M.D. Stritzinger, M. Fraser, M. Newsome, N. Elias-Rosa, P.A. Mazzali, P. Lundqvist, P. Minguez, R.J. Wainscoat, S. Benetti, S.J. Smartt, S. Moran, S.-P. Pei, S. Srivastav, S. Williams, T.B. Lowe, T. de Boer, T. Kangas, T.M. Reynolds, W.-L. Lin, X.-F. Wang, X.-H. Zhang, X.-J. Zhu, X.-R. Ma, Y.-Z. Cai, Z.-H. Chen, Z.-H. Peng, Z.-T. Li, Z.-Y. Wang","submitted_at":"2025-06-18T04:45:15Z","abstract_excerpt":"We present the photometric and spectroscopic analysis of five Type Ibn supernovae (SNe): SN 2020nxt, SN 2020taz, SN 2021bbv, SN 2023utc, and SN 2024aej. These events share key observational features and belong to a family of objects similar to the prototypical Type Ibn SN 2006jc. The SNe exhibit rise times of approximately 10 days and peak absolute magnitudes ranging from $-$16.5 to $-$19 mag. Notably, SN 2023utc is the faintest Type Ibn supernova discovered to date, with an exceptionally low r-band absolute magnitude of $-16.4$ mag. The pseudo-bolometric light curves peak at $(1-10) \\times 10"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.15139","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/2506.15139/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"}