{"paper":{"title":"Bridging between type IIb and Ib supernovae: SN IIb 2022crv with a very thin Hydrogen envelope","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Anirban Dutta, Anjasha Gangopadhyay, Avinash Singh, Bhavya Ailawadhi, D.K. Sahu, Keiichi Maeda, Keisuke Isoga, Kenta Taguchi, Kohki Uno, Koji S Kawabata, Kuntal Misra, Masaomi Tanaka, Masayuki Yamanaka, Miho Kawabata, Mridweeka Singh, Naveen Dukiya, Nayana A.J., Nozomu Tominaga, Poonam Chandra, Rami Z. E. Alsaberi, Raya Dastidar, Rishabh Singh Teja, Roger Chevalier, Ryo Imazawa, Stuart D Ryder, Taisei Hamada, Takashi J Moriya, Tatsuya Nakaoka, Tomoya Hori","submitted_at":"2023-09-14T06:43:04Z","abstract_excerpt":"We present optical, near-infrared, and radio observations of supernova (SN) SN~IIb 2022crv. We show that it retained a very thin H envelope and transitioned from a SN~IIb to a SN~Ib; prominent H$\\alpha$ seen in the pre-maximum phase diminishes toward the post-maximum phase, while He {\\sc i} lines show increasing strength. \\texttt{SYNAPPS} modeling of the early spectra of SN~2022crv suggests that the absorption feature at 6200\\,\\AA\\ is explained by a substantial contribution of H$\\alpha$ together with Si {\\sc ii}, as is also supported by the velocity evolution of H$\\alpha$. The light-curve evol"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2309.07463","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2309.07463/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"}