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    "story_id": "mp-2026-10-27-014",
    "source_story_id": "tmp-story-sn-ares-time-delay",
    "edition_id": "mp-2026-10-27-morning-0109",
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    "position": 14,
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    "headline": "A Supernova Arrived. Its Next Image Is Due in Seventy Years.",
    "slug": "a-supernova-arrived-its-next-image-is-due-in-seventy-years",
    "dek": "JWST spectroscopy identifies SN Ares as the highest-redshift spectroscopically confirmed Type IIb supernova, with two lensed images predicted decades ahead.",
    "summary": "JWST spectroscopy identifies SN Ares as the highest-redshift spectroscopically confirmed Type IIb supernova, with two lensed images predicted decades ahead.",
    "body_text": "SN Ares appeared in one image of a massive host galaxy triply lensed by the MACS J0308.9+2645 cluster. JWST/NIRSpec detected helium, hydrogen-alpha and Paschen-beta features at a spectroscopic redshift of 1.276, leading the team to classify it as a Type IIb supernova—the highest-redshift member of that class identified spectroscopically in the study. Comparison with local events places the spectrum about 34 rest-frame days after radioactive peak, with uncertainty of roughly nine to ten days. A JWST-informed lens model predicts two future images near the cluster center in at least 70 years, magnified by about five and 1.5 times. Those arrival times and magnifications remain model predictions awaiting improved cluster constraints.",
    "why_it_matters": "JWST spectroscopy identifies SN Ares as the highest-redshift spectroscopically confirmed Type IIb supernova, with two lensed images predicted decades ahead.",
    "limitations": [
      "Those arrival times and magnifications remain model predictions awaiting improved cluster constraints."
    ],
    "importance": 9,
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    "first_published_at": "2026-10-27T09:00:00.000-04:00",
    "modified_at": "2026-10-27T09:00:00.000-04:00",
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        "text": "JWST spectroscopy identifies SN Ares as the highest-redshift spectroscopically confirmed Type IIb supernova, with two lensed images predicted decades ahead.",
        "source_ids": [
          "source-2026-10-27-014"
        ],
        "qualification": "Those arrival times and magnifications remain model predictions awaiting improved cluster constraints."
      }
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    "source_ids": [
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    "tags": [
      "JWST",
      "supernova",
      "gravitational lensing",
      "astronomy"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-10-27-014",
      "title": "arXiv preprint 2610.33161, original v1",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2610.33161v1",
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      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-10-25T20:00:00.000-04:00",
      "accessed_at": "2026-10-27T08:18:12.114-04:00",
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  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "A Supernova Arrived. Its Next Image Is Due in Seventy Years.",
    "publisher": "The Machine Press",
    "published_at": "2026-10-27T09:00:00.000-04:00",
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