{
  "abstract": "The core-collapse supernovae (CCSNe) 2022prr, 2023ucy, and 2024ljc exploded within the central regions of the nearby luminous infrared galaxy (LIRG) NGC6745. We present our follow-up data with the aim to characterise the spectrophotometric evolution of these CCSNe, determine their host-galaxy extinction, and to define their physical nature. The presented spectrophotometric data set covers the optical and near-infrared region for our three supernovae (SNe). The data are analysed and compared to other hydrogen-rich CCSNe, and a host-galaxy extinction value Av is derived based on broadband photometry for each of the targets. A spectral energy distribution (SED) for the host galaxy is constructed, and a combination of different galactic components are fitted to the SED to estimate the intrinsic CCSN rate and the age of the starburst of NGC6745. 2022prr is a SN2009ip-like event, whose light curve evolution consists of two consecutive luminous events A and B with peak magnitudes of Mr = -14.8 and -18.3 mag, respectively. The high degree of V and R-band polarisation (P=2.8%) near maximum light suggests interaction with highly aspherical circumstellar material. The spectral evolution of the SN is dominated by narrow Balmer emission lines, which have a complex evolution over time. 2022prr joins the growing sample of SN2009ip-like events that show early `flash ionisation' features of CIII, NIII, and HeII. 2023ucy is found to be a normal Type IIP SN. However, 2024ljc is a rapidly evolving Type IIb SN with a post-maximum r-band decline of roughly 3.2 mag by +41 d whereas normal IIb SNe decline typically by 1.5+/-0.3 mag during the same timescale. While the events exploded in a LIRG, the SNe are obscured by only moderate V-band host extinctions ranging from 0 to 1 mag. Based on the SED modelling we estimate an age of the host starburst to be 40Myr, and the intrinsic CCSN rate to be 0.4+/-0.1 SN/year.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21742",
  "author_total": 22,
  "authors": [
    {
      "name": "K. K. Matilainen"
    },
    {
      "name": "E. Kankare"
    },
    {
      "name": "T. Nagao"
    },
    {
      "name": "T. Reynolds"
    },
    {
      "name": "A. Efstathiou"
    },
    {
      "name": "S. Mattila"
    },
    {
      "name": "C. R. Angus"
    },
    {
      "name": "A. Reguitti"
    },
    {
      "name": "Y. -Z. Cai"
    },
    {
      "name": "M. Fraser"
    },
    {
      "name": "L. Galbany"
    },
    {
      "name": "M. González-Bañuelos"
    },
    {
      "name": "C. P. Gutiérrez"
    },
    {
      "name": "T. Kangas"
    },
    {
      "name": "T. L. Killestein"
    },
    {
      "name": "T. Kravtsov"
    },
    {
      "name": "P. Lundqvist"
    },
    {
      "name": "S. Moran"
    },
    {
      "name": "A. Pastorello"
    },
    {
      "name": "A. Popowicz"
    },
    {
      "name": "I. Salmaso"
    },
    {
      "name": "M. Stritzinger"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4832ztckqrtkc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21742",
  "fulltext_url": null,
  "id": "4832ztckqrtkc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21742",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.21742",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4832ztckqrtkc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21742",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21742"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Core-collapse supernovae 2022prr, 2023ucy, and 2024ljc in the luminous infrared galaxy NGC 6745",
  "title_text": "Core-collapse supernovae 2022prr, 2023ucy, and 2024ljc in the luminous infrared galaxy NGC 6745",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/4832ztckqrtkc",
  "venue": "arXiv",
  "versions": []
}