{
  "abstract": "We present spectrophotometric observations of the Type Ibn supernova SN 2020able, along with a comprehensive analysis and modelling of its evolution. The transient occurred in SDSS J092602.93+243115.1, a faint host galaxy characterised by significantly subsolar metallicity (12 + log(O/H) ≃ 8.28 dex). The early photometric evolution and high peak luminosity (Lpeak ≃ 4.4 × 1043 erg s−1) indicate an efficient conversion of ejecta kinetic energy into radiation via interaction with the circumstellar medium. Light-curve modelling suggests that this interaction involves ejecta with a mass of Mej ≃ 1.3 M☉ impacting a shell of MCSM ≃ 0.6 M☉. However, interaction is found to be geometrically and temporally confined within a few days after explosion, with the later evolution of the transient being dominated by the free expansion of the ejecta. Spectroscopic analysis reveals a complex, stratified, circumstellar environment. In addition to the innermost shocked region, we identify two additional He-rich shells: a dense inner one (ne ≃ 1.4 × 109 cm−3) located at R ≳ 9.3 × 1014 cm, and a more extended outer component reaching Rout ≃ 3.3 × 1015 cm and expanding at approximately 1.2 × 103 km s−1. The physical parameters of the former suggest it was produced by a discrete, pre-supernova eruptive event similar to that of SN 2006jc, which expelled approximately 1.8 × 10−2 M☉ of material. Conversely, the expansion velocity of the outermost shell is consistent with the escape velocity of Wolf–Rayet stars, pointing towards a late WN- to WC-type progenitor as the most viable candidate for SN 2020able.",
  "abstract_shown": true,
  "affiliations": [
    "INAF – Osservatorio Astronomico d’Abruzzo",
    "INAF – Osservatorio Astronomico di Padova",
    "Oskar Klein Centre, Department of Astronomy, Stockholm University",
    "Aryabhatta Research Institute of Observational Sciences",
    "INAF – Osservatorio Astronomico di Brera",
    "Physical Research Laboratory",
    "School of Physics and Astronomy, University of Birmingham",
    "South-Western Institute for Astronomy Research, Yunnan University",
    "National Centre for Radio Astrophysics, Tata Institute of Fundamental Research",
    "Indian Institute of Astrophysics",
    "Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n",
    "Las Cumbres Observatory",
    "Department of Astronomy, University of Florida, Bryant Space Science Center",
    "NASA Goddard Space Flight Center",
    "Gemini Observatory/NSF’s National Optical-Infrared Astronomy Research Laboratory",
    "Steward Observatory, University of Arizona",
    "Università degli Studi di Padova, Dipartimento di Fisica e Astronomia",
    "Independent researcher",
    "Department of Astronomy, The University of Texas at Austin",
    "Department of Physics and Astronomy, Johns Hopkins University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 32,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Tartaglia L.",
      "orcid": "0000-0003-3433-1492"
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        1
      ],
      "name": "Cappellaro E.",
      "orcid": "0000-0001-5008-8619"
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    {
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        1
      ],
      "name": "Valerin G."
    },
    {
      "affs": [
        1
      ],
      "name": "Pastorello A.",
      "orcid": "0000-0002-7259-4624"
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    {
      "affs": [
        1
      ],
      "name": "Benetti S.",
      "orcid": "0000-0002-3256-0016"
    },
    {
      "affs": [
        1
      ],
      "name": "Reguitti A.",
      "orcid": "0000-0003-4254-2724"
    },
    {
      "affs": [
        1
      ],
      "name": "Tomasella L.",
      "orcid": "0000-0002-3697-2616"
    },
    {
      "affs": [
        2
      ],
      "name": "Lundqvist P.",
      "orcid": "0000-0002-3664-8082"
    },
    {
      "affs": [
        3
      ],
      "name": "Misra K.",
      "orcid": "0000-0003-1637-267X"
    },
    {
      "affs": [
        2
      ],
      "name": "Gangopadhyay A.",
      "orcid": "0000-0002-3884-5637"
    },
    {
      "affs": [
        4
      ],
      "name": "Dastidar R.",
      "orcid": "0000-0001-6191-7160"
    },
    {
      "affs": [
        5
      ],
      "name": "Ailawadhi B.",
      "orcid": "0009-0000-1020-9711"
    },
    {
      "affs": [
        6
      ],
      "name": "Dimple",
      "orcid": "0000-0001-9868-9042"
    },
    {
      "affs": [
        7
      ],
      "name": "Kumar B.",
      "orcid": "0000-0001-7225-2475"
    },
    {
      "affs": [
        8
      ],
      "name": "Jha V. K.",
      "orcid": "0000-0002-3277-6335"
    },
    {
      "affs": [
        9
      ],
      "name": "Singh M.",
      "orcid": "0000-0001-6706-2749"
    },
    {
      "affs": [
        1
      ],
      "name": "Elias-Rosa N.",
      "orcid": "0000-0002-1381-9125"
    },
    {
      "affs": [
        10
      ],
      "name": "Gutiérrez C. P.",
      "orcid": "0000-0003-2375-2064"
    },
    {
      "affs": [
        11
      ],
      "name": "Howell D. A."
    },
    {
      "affs": [
        12
      ],
      "name": "Hiramatsu D.",
      "orcid": "0000-0002-1125-9187"
    },
    {
      "affs": [
        13
      ],
      "name": "Pellegrino C."
    },
    {
      "affs": [
        14
      ],
      "name": "Andrews J."
    },
    {
      "affs": [
        15
      ],
      "name": "Sand D. J.",
      "orcid": "0000-0003-4102-380X"
    },
    {
      "affs": [
        15
      ],
      "name": "Smith N."
    },
    {
      "affs": [
        15
      ],
      "name": "Pearson J.",
      "orcid": "0000-0002-0744-0047"
    },
    {
      "affs": [
        13
      ],
      "name": "Wyatt S."
    },
    {
      "affs": [
        16
      ],
      "name": "Ochner P.",
      "orcid": "0000-0001-5578-8614"
    },
    {
      "affs": [
        1
      ],
      "name": "Cai Y.-Z.",
      "orcid": "0000-0002-7714-493X"
    },
    {
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        17
      ],
      "name": "Burke J."
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    {
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        11
      ],
      "name": "McCully C."
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    {
      "affs": [
        18
      ],
      "name": "Newsome M."
    },
    {
      "affs": [
        19
      ],
      "name": "Padilla Gonzalez E."
    }
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  "bibtex": "https://research.draconitic.com/paper/5w8y9g0vhma72.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202660937",
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  "language": "en",
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  "published": "2026-10-31",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/5w8y9g0vhma72.ris",
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  "subjects": [
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  "title": "Wild behaviour near the finish line: The Type Ibn SN 2020able and its stratified environment",
  "title_text": "Wild behaviour near the finish line: The Type Ibn SN 2020able and its stratified environment",
  "type": "peer-reviewed",
  "updated_at": "2026-10-31T14:22:36Z",
  "url": "https://research.draconitic.com/paper/5w8y9g0vhma72",
  "venue": "Astronomy & Astrophysics",
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}