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    "story_id": "mp-2026-09-11-027",
    "source_story_id": "tmp-story-astronomy-language-model-traces-front-rail",
    "edition_id": "mp-2026-09-11-morning-0064",
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    "position": 16,
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    "headline": "The Model Trace Reached More Than Half of Astronomy Papers",
    "slug": "the-model-trace-reached-more-than-half-of-astronomy-papers",
    "dek": "A Bayesian study estimates 54% of 2025 astro-ph papers carried language-model markers, while 0.81% disclosed their use.",
    "summary": "A Bayesian study estimates 54% of 2025 astro-ph papers carried language-model markers, while 0.81% disclosed their use.",
    "body_text": "The analysis counts distinctive vocabulary across 207,111 astro-ph papers from 2015 to mid-2026, calibrating unassisted prose with pre-2020 papers and assisted prose with 392 disclosures. Its central 2025 estimate is 54%, with an eight-point statistical interval and a one-sided systematic range as wide as 26 points because today’s no-model background cannot be observed directly. The estimate remains at least 36% under tested choices. Only 0.81% of 2025 papers disclosed model use—roughly one declaration per 66 papers carrying a trace. Vocabulary markers are indirect and adaptive, so the result estimates assistance rather than proving it paper by paper.",
    "why_it_matters": "A Bayesian study estimates 54% of 2025 astro-ph papers carried language-model markers, while 0.81% disclosed their use.",
    "limitations": [
      "Its central 2025 estimate is 54%, with an eight-point statistical interval and a one-sided systematic range as wide as 26 points because today’s no-model background cannot be observed directly.",
      "Only 0.81% of 2025 papers disclosed model use—roughly one declaration per 66 papers carrying a trace."
    ],
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    "first_published_at": "2026-09-11T09:00:00.000-04:00",
    "modified_at": "2026-09-11T09:00:00.000-04:00",
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        "text": "A Bayesian study estimates 54% of 2025 astro-ph papers carried language-model markers, while 0.81% disclosed their use.",
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        "qualification": "Its central 2025 estimate is 54%, with an eight-point statistical interval and a one-sided systematic range as wide as 26 points because today’s no-model background cannot be observed directly."
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    "tags": [
      "scientific writing",
      "language models",
      "disclosure"
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    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-09-11-016",
      "title": "arXiv preprint 2609.10664",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.10664",
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      "published_at": "2026-09-09T14:00:00.000-04:00",
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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": "The Model Trace Reached More Than Half of Astronomy Papers",
    "publisher": "The Machine Press",
    "published_at": "2026-09-11T09:00:00.000-04:00",
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