{
  "abstract": "We present space-based follow-up observations of the superluminous Type I supernova (SLSN-I) SN 2025wny at redshift $z_{SN}=2.0151$, gravitationally lensed by two galaxies at redshifts $z_{G1}=0.3755$ and $z_{G2}=0.3766$ into five resolved images. SN 2025wny is the first strongly lensed SLSN discovered and the first galaxy-scale lensed supernova for which both photometric and spectroscopic time-delay measurements are feasible. As such, it opens a new observational window for precision cosmology and the study of stellar explosions near the epoch of peak cosmic star formation. Our follow-up observations comprise two epochs of Hubble Space Telescope (HST) imaging, together with near-infrared imaging and spectroscopy obtained with the James Webb Space Telescope (JWST). From these data, we measure precise astrometry and multi-band photometry for the five resolved supernova images, the host galaxy, and the two deflecting galaxies. HST provides accurate relative image positions and rest-frame ultraviolet photometry, while JWST delivers complementary near-infrared imaging and spectroscopy probing the rest-frame optical at high signal-to-noise ratio. Together they yield a detailed characterization of both the lensing configuration and the supernova spectral energy distribution over a broad wavelength range. The data presented here provide the observational foundation for the accompanying analyses of the supernova properties, lens modeling, and time-delay cosmography, including the astrometric, photometric, and spectroscopic information required to measure $H_0$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.28413",
  "author_total": 24,
  "authors": [
    {
      "name": "Ariel Goobar"
    },
    {
      "name": "Joel Johansson"
    },
    {
      "name": "Edvard Mörtsell"
    },
    {
      "name": "Cameron Lemon"
    },
    {
      "name": "Steve Schulze"
    },
    {
      "name": "Suhail Dhawan"
    },
    {
      "name": "Alice Townsend"
    },
    {
      "name": "Maggie L. Li"
    },
    {
      "name": "Yu-Jing Qin"
    },
    {
      "name": "Lin Yan"
    },
    {
      "name": "Christoffer Fremling"
    },
    {
      "name": "Mansi M. Kasliwal"
    },
    {
      "name": "Peter Nugent"
    },
    {
      "name": "Graham P. Smith"
    },
    {
      "name": "Jesper Sollerman"
    },
    {
      "name": "Igor Andreoni"
    },
    {
      "name": "Nikki Arendse"
    },
    {
      "name": "Thomas E. Collett"
    },
    {
      "name": "Jakob Nordin"
    },
    {
      "name": "Jacob Osman Hjortlund"
    },
    {
      "name": "Daniel A. Perley"
    },
    {
      "name": "Mickael Rigault"
    },
    {
      "name": "Stephen Thorp"
    },
    {
      "name": "Jacob L. Wise"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e9ycsyn0gn1sx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.28413",
  "fulltext_url": null,
  "id": "e9ycsyn0gn1sx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.28413",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.CO"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
    [
      "openalex",
      "3103|Gamma-ray bursts and supernovae"
    ]
  ],
  "openalex": "W7204805079",
  "pdf_url": "https://arxiv.org/pdf/2608.28413",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e9ycsyn0gn1sx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "2608.28413",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.28413"
    },
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "hal-05742747",
      "source": "hal",
      "url": "https://hal.science/hal-05742747v1"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Follow-up of SN 2025wny I: Space-based Observations of the First Multiply-imaged Superluminous Supernova",
  "title_text": "Follow-up of SN 2025wny I: Space-based Observations of the First Multiply-imaged Superluminous Supernova",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:31Z",
  "url": "https://research.draconitic.com/paper/e9ycsyn0gn1sx",
  "venue": "arXiv",
  "versions": []
}