{
  "abstract": "GW230814, detected by the LIGO Livingston observatory with a signal-to-noise ratio of 42.4, represents the loudest gravitational-wave signal in the GWTC-4.0 catalog. Its source is consistent with a binary black hole coalescence with component masses m 1 = 33 . 7 − 2.2 + 2.9 M ⊙ and m 2 = 28 . 2 − 3.1 + 2.2 M ⊙ and a small effective inspiral spin χ eff = − 0.0 1 − 0.07 + 0.06 . The high signal-to-noise ratio enabled us to detect an ℓ = ∣ m ∣ = 4 mode in the inspiral–merger–ringdown signal for the first time (with Bayes factor ≈10), as well as enabling a range of tests of consistency between theoretical predictions and the observed waveform. While most of these tests show agreement with theoretical predictions, there are suggestions of minor deviations in the ringdown phase. Simulations that incorporate general relativity and realistic detector noise reproduce similar deviations, suggesting that they do not constitute evidence for a breakdown of general relativity. The observation of GW230814 demonstrates that the unprecedented sensitivity of the detectors enables highly significant detections with a single observatory. However, without corroborating data from a multidetector network, the ability to draw rigorous conclusions about fundamental physics remains severely limited.",
  "abstract_shown": true,
  "affiliations": [
    "Max Planck Institute for Gravitational Physics (Albert Einstein Institute)",
    "LIGO Hanford Observatory",
    "Dipartimento di Farmacia",
    "INFN",
    "University of Warwick",
    "OzGrav",
    "The Pennsylvania State University",
    "Leibniz Universität Hannover",
    "University of Wisconsin-Milwaukee",
    "LIGO Laboratory",
    "Louisiana State University",
    "Tata Institute of Fundamental Research",
    "Centre de Physique Théorique",
    "Université catholique de Louvain",
    "Queen Mary University of London",
    "University of California",
    "University of Minnesota",
    "Instituto Nacional de Pesquisas Espaciais",
    "Université Paris Cité",
    "Università di Roma Tor Vergata",
    "Universiteit Antwerpen",
    "International Centre for Theoretical Sciences",
    "Advanced Technology Center",
    "Gravitational Wave Science Project",
    "INFN Sezione di Torino",
    "Theoretisch-Physikalisches Institut",
    "Dipartimento di Fisica",
    "Univ. Savoie Mont Blanc",
    "Università di Napoli “Federico II,”",
    "Cardiff University",
    "Maastricht University",
    "Nikhef",
    "Università di Roma “La Sapienza",
    "Aix Marseille Univ",
    "Université Paris-Saclay",
    "University of Tokyo",
    "Institut de Física d’Altes Energies (IFAE)",
    "Gran Sasso Science Institute (GSSI)",
    "University of Florida",
    "Dipartimento di Scienze Matematiche"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 100,
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      "name": "Adrian Abac",
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      "name": "I. Abouelfettouh"
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      "name": "K. Ackley",
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      "name": "Christian Adamcewicz",
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      "name": "S. Adhicary",
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      "name": "S. Al-Shammari"
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      "name": "S. Álvarez-López",
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      "name": "W. Amar"
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      "name": "O. Amarasinghe"
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      "name": "F. Amicucci",
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      "name": "Claude Amra",
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      "name": "A. Ananyeva"
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      "name": "S. B. Anderson",
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      "name": "Warren G. Anderson",
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      "name": "Marc Andrés-Carcasona",
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      "name": "J. Anglin"
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      "name": "Stefano Ansoldi",
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      "name": "Javier Mauricio Antelis",
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      "name": "S. Antier",
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      "name": "E. Z. Appavuravther"
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      "name": "S. Appert"
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    {
      "name": "S. K. Apple",
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      "name": "Koji Arai",
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      "name": "A. Araya",
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      "name": "M. C. Araya",
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      "name": "Manuel Arca Sedda",
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  "bibtex": "https://research.draconitic.com/paper/ds43hycvaa1kg.bib",
  "cited_by": 30,
  "doi": "10.3847/2041-8213/ae2ad3",
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  "issns": [
    "2041-8205",
    "2041-8213"
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  "landing_url": "https://doi.org/10.3847/2041-8213/ae2ad3",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
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  "published": "2026-06-18",
  "publisher": "IOP Publishing",
  "ris": "https://research.draconitic.com/paper/ds43hycvaa1kg.ris",
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      "url": "https://doi.org/10.3847/2041-8213/ae2ad3"
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  "subjects": [
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      "field": "astronomy",
      "origin": "openalex:3103|Pulsars and Gravitational Waves Research",
      "subfield": "high-energy-astrophysics"
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  ],
  "title": "GW230814: Investigation of a Loud Gravitational-wave Signal Observed with a Single Detector",
  "title_text": "GW230814: Investigation of a Loud Gravitational-wave Signal Observed with a Single Detector",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T13:20:37Z",
  "url": "https://research.draconitic.com/paper/ds43hycvaa1kg",
  "venue": "The Astrophysical Journal Letters",
  "versions": []
}