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    "title": "CMB gravitational lensing detected through WMAP and radio-galaxy cross-correlation",
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        "title": "Detection of Gravitational Lensing in the Cosmic Microwave Background",
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        "description": "The detection is a statistical cross-correlation using an external tracer, not a high-significance internal CMB-only lensing map. The quoted significance depends on the analysis and systematic-error model; the curl null test does not test every parity-symmetric contaminant. The authors did not infer a fully calibrated cosmological parameter constraint because source redshift distribution and galaxy bias were uncertain.",
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      "statement": "# CMB gravitational lensing detected through WMAP and radio-galaxy cross-correlation\n\nSmith, Zahn and Doré reconstructed a noisy gravitational-lensing potential from WMAP temperature maps and cross-correlated it with radio-source counts from the NVSS survey. They reported a 3.4σ lensing signal including their modeled systematic errors, an early observational detection of CMB lensing.\n\n## Scientific scope\n\nThe detection is a statistical cross-correlation using an external tracer, not a high-significance internal CMB-only lensing map. The quoted significance depends on the analysis and systematic-error model; the curl null test does not test every parity-symmetric contaminant. The authors did not infer a fully calibrated cosmological parameter constraint because source redshift distribution and galaxy bias were uncertain.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nKendrick M. Smith; Oliver Zahn; Olivier Doré\n\nThese are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.\n\n\n\n## Original sources\n\n- [Detection of Gravitational Lensing in the Cosmic Microwave Background](https://arxiv.org/pdf/0705.3980v1)\n",
      "summary": "Smith, Zahn and Doré reconstructed a noisy gravitational-lensing potential from WMAP temperature maps and cross-correlated it with radio-source counts from the NVSS survey. They reported a 3.4σ lensing signal including their modeled systematic errors, an early observational detection of CMB lensing.",
      "title": "CMB gravitational lensing detected through WMAP and radio-galaxy cross-correlation"
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    "id": "smith-zahn-dore-wmap-nvss-cmb-lensing-2007",
    "entry_id": "smith-zahn-dore-wmap-nvss-cmb-lensing-2007",
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    "title": "CMB gravitational lensing detected through WMAP and radio-galaxy cross-correlation",
    "context": "Observational cosmology",
    "track": "Source-reported experimental result or reusable measurement method",
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    "what_changed": "Smith, Zahn and Doré reconstructed a noisy gravitational-lensing potential from WMAP temperature maps and cross-correlated it with radio-source counts from the NVSS survey. They reported a 3.4σ lensing signal including their modeled systematic errors, an early observational detection of CMB lensing.",
    "scope": "Smith, Zahn and Doré reconstructed a noisy gravitational-lensing potential from WMAP temperature maps and cross-correlated it with radio-source counts from the NVSS survey. They reported a 3.4σ lensing signal including their modeled systematic errors, an early observational detection of CMB lensing. The detection is a statistical cross-correlation using an external tracer, not a high-significance internal CMB-only lensing map. The quoted significance depends on the analysis and systematic-error model; the curl null test does not test every parity-symmetric contaminant. The authors did not infer a fully calibrated cosmological parameter constraint because source redshift distribution and galaxy bias were uncertain.",
    "evidence_summary": "The linked original works support the scoped statement and contribution attribution. WRS has not independently replayed experiments or reconstructed a full mathematical proof. The detection is a statistical cross-correlation using an external tracer, not a high-significance internal CMB-only lensing map. The quoted significance depends on the analysis and systematic-error model; the curl null test does not test every parity-symmetric contaminant. The authors did not infer a fully calibrated cosmological parameter constraint because source redshift distribution and galaxy bias were uncertain.",
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        "title": "Detection of Gravitational Lensing in the Cosmic Microwave Background",
        "url": "https://arxiv.org/pdf/0705.3980v1",
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