{"paper":{"title":"Ultraviolet to Infrared Spectroscopy of the Type Ibn SN 2023tsz Suggests a Lower-mass Progenitor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alexei V. Filippenko, Aravind P. Ravi, Asia deGraw, Bhagya M. Subrayan, Brian Hsu, Curtis McCully, D. Andrew Howell, Darshana Mehta, David J. Sand, Emily T. Hoang, Griffin Hosseinzadeh, Jeniveve Pearson, Jennifer E. Andrews, Jeonghee Rho, Joseph Farah, Justin Pierel, Kathryn Wynn, K. Azalee Bostroem, Luc Dessart, Manisha Shrestha, Megan Newsome, Melissa Shahbandeh, Moira Andrews, Nathan Smith, Neil Pichay, Nicolas E. Meza Retamal, Ori Fox, Pallas Beddow, Patrick Kelly, Peter J. Brown, Qinan Wang, Saurabh W. Jha, Schuyler D. Van Dyk, Sebastian Gomez, Seong Hyun Park, Sergiy S. Vasylyev, Stefano Valenti, Tam\\'as Szalai, Thomas G. Brink, Thomas R. Geballe, Weikang Zheng, Yi Yang, Yize Dong, Yossef Zenati, Yuan Q. Ni","submitted_at":"2026-07-16T18:00:28Z","abstract_excerpt":"Type Ibn supernovae are stripped-envelope explosions whose spectra indicate interaction with dense, helium-rich and hydrogen-poor circumstellar material (CSM), making them important probes of late-stage mass loss and progenitor stripping. We present extensive ultraviolet-to-near-infrared spectrophotometry of the Type Ibn SN 2023tsz, including two epochs of HST/STIS ultraviolet (UV) spectroscopy and ground-based optical and near-infrared follow-up observations. The spectra are dominated by intermediate-width emission lines at all phases after maximum light, suggesting that much of the luminosit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15342","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/2607.15342/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"}