{
  "abstract": "Superluminous supernovae, among the brightest stellar explosions, are thought to be powered by newborn magnetars. One such event, SN 2024afav, ``chirped'', displaying sinusoidal, increasing-frequency ($P(99\\textrm{ d})\\sim39\\pm8$ d to $P(166\\textrm{ d})\\sim17\\pm5$ d) light-curve modulations. The model explaining this chirp, a precessing disk falling onto the dimming magnetar, generalizes to a normalization-independent universal relation between the period derivative and the dimming rate of the light curve. Applied to the published chirp alone, with the spin-down time measured from the unmodulated light curve, the relation predicts that the chirp must halt near $t \\approx 150$ d and reverse. With continued follow-up of SN 2024afav, we report the discovery of five new modulations in which the chirp reverses ($P(177\\textrm{ d})\\sim24\\pm4$ d to $P(208\\textrm{ d})\\sim38\\pm2$ d) at $t=147\\pm3$ d, as predicted. Applied to chirping events from upcoming surveys, the relation could identify the precession mechanism and disk physics of each engine.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.39240",
  "author_total": 3,
  "authors": [
    {
      "name": "Joseph R. Farah"
    },
    {
      "name": "Logan J. Prust"
    },
    {
      "name": "Hang Yu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bxnaq8x0wpbcp.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.39240",
  "fulltext_url": null,
  "id": "bxnaq8x0wpbcp",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.39240",
  "language": null,
  "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.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.39240",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bxnaq8x0wpbcp.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.39240",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.39240"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "A universal relation predicts the observed reversal of a supernova chirp",
  "title_text": "A universal relation predicts the observed reversal of a supernova chirp",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/bxnaq8x0wpbcp",
  "venue": "arXiv",
  "versions": []
}