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    "title": "Optical stellar intensity interferometry of Sirius",
    "summary": "At Jodrell Bank Hanbury Brown and Twiss tested optical intensity interferometry on Sirius, observing a decrease in correlated intensity with projected baseline. A later participant account reproduces four observational signal-to-noise values and reports a best-fit angular diameter of 7.1 ± 0.55 milliarcseconds after a theoretical limb-darkening correction.",
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    "area": "Astronomical instrumentation and stellar measurements",
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        "id": "hanbury-brown-intensity-interferometer-book-1974",
        "title": "The Intensity Interferometer: Its Application to Astronomy",
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        "date": "1974"
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        "id": "hanbury-brown-twiss-sirius-stellar-interferometer-1956",
        "title": "A Test of a New Type of Stellar Interferometer on Sirius",
        "url": "https://www.nature.com/articles/1781046a0",
        "date": "1956-11-10"
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      "scope": "At Jodrell Bank Hanbury Brown and Twiss tested optical intensity interferometry on Sirius, observing a decrease in correlated intensity with projected baseline. A later participant account reproduces four observational signal-to-noise values and reports a best-fit angular diameter of 7.1 ± 0.55 milliarcseconds after a theoretical limb-darkening correction. Hanbury Brown and Twiss’s 1956 paper gives the original two-author attribution. The quoted 7.1 ± 0.55 milliarcsecond diameter and four signal-to-noise values come from Hanbury Brown’s later participant account and subsequent analysis; they should not be presented as a direct reanalysis of the original observations. Atmospheric scintillation, optical bandwidth, normalization and limb-darkening assumptions affect the result.",
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          "name": "R. Hanbury Brown",
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            "citation": "The Intensity Interferometer: Its Application to Astronomy",
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            "citation": "A Test of a New Type of Stellar Interferometer on Sirius",
            "url": "https://www.nature.com/articles/1781046a0"
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            "citation": "The Intensity Interferometer: Its Application to Astronomy",
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            "citation": "A Test of a New Type of Stellar Interferometer on Sirius",
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      "scope": {
        "description": "Hanbury Brown and Twiss’s 1956 paper gives the original two-author attribution. The quoted 7.1 ± 0.55 milliarcsecond diameter and four signal-to-noise values come from Hanbury Brown’s later participant account and subsequent analysis; they should not be presented as a direct reanalysis of the original observations. Atmospheric scintillation, optical bandwidth, normalization and limb-darkening assumptions affect the result.",
        "domain": "Astronomical instrumentation and stellar measurements"
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          "citation": "The Intensity Interferometer: Its Application to Astronomy",
          "url": "https://electrooptical.net/hanbury/hanbury.pdf"
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      "statement": "# Optical stellar intensity interferometry of Sirius\n\nAt Jodrell Bank Hanbury Brown and Twiss tested optical intensity interferometry on Sirius, observing a decrease in correlated intensity with projected baseline. A later participant account reproduces four observational signal-to-noise values and reports a best-fit angular diameter of 7.1 ± 0.55 milliarcseconds after a theoretical limb-darkening correction.\n\n## Scientific scope\n\nHanbury Brown and Twiss’s 1956 paper gives the original two-author attribution. The quoted 7.1 ± 0.55 milliarcsecond diameter and four signal-to-noise values come from Hanbury Brown’s later participant account and subsequent analysis; they should not be presented as a direct reanalysis of the original observations. Atmospheric scintillation, optical bandwidth, normalization and limb-darkening assumptions affect the result.\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\nR. Hanbury Brown; R. Q. Twiss\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- [The Intensity Interferometer: Its Application to Astronomy](https://electrooptical.net/hanbury/hanbury.pdf)\n- [A Test of a New Type of Stellar Interferometer on Sirius](https://www.nature.com/articles/1781046a0)\n",
      "summary": "At Jodrell Bank Hanbury Brown and Twiss tested optical intensity interferometry on Sirius, observing a decrease in correlated intensity with projected baseline. A later participant account reproduces four observational signal-to-noise values and reports a best-fit angular diameter of 7.1 ± 0.55 milliarcseconds after a theoretical limb-darkening correction.",
      "title": "Optical stellar intensity interferometry of Sirius"
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    "id": "hanbury-brown-twiss-sirius-stellar-intensity-interferometry-1956",
    "entry_id": "hanbury-brown-twiss-sirius-stellar-intensity-interferometry-1956",
    "revision": 1,
    "title": "Optical stellar intensity interferometry of Sirius",
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    "what_changed": "At Jodrell Bank Hanbury Brown and Twiss tested optical intensity interferometry on Sirius, observing a decrease in correlated intensity with projected baseline. A later participant account reproduces four observational signal-to-noise values and reports a best-fit angular diameter of 7.1 ± 0.55 milliarcseconds after a theoretical limb-darkening correction.",
    "scope": "At Jodrell Bank Hanbury Brown and Twiss tested optical intensity interferometry on Sirius, observing a decrease in correlated intensity with projected baseline. A later participant account reproduces four observational signal-to-noise values and reports a best-fit angular diameter of 7.1 ± 0.55 milliarcseconds after a theoretical limb-darkening correction. Hanbury Brown and Twiss’s 1956 paper gives the original two-author attribution. The quoted 7.1 ± 0.55 milliarcsecond diameter and four signal-to-noise values come from Hanbury Brown’s later participant account and subsequent analysis; they should not be presented as a direct reanalysis of the original observations. Atmospheric scintillation, optical bandwidth, normalization and limb-darkening assumptions affect the result.",
    "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. Hanbury Brown and Twiss’s 1956 paper gives the original two-author attribution. The quoted 7.1 ± 0.55 milliarcsecond diameter and four signal-to-noise values come from Hanbury Brown’s later participant account and subsequent analysis; they should not be presented as a direct reanalysis of the original observations. Atmospheric scintillation, optical bandwidth, normalization and limb-darkening assumptions affect the result.",
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        "title": "The Intensity Interferometer: Its Application to Astronomy",
        "url": "https://electrooptical.net/hanbury/hanbury.pdf",
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        "title": "A Test of a New Type of Stellar Interferometer on Sirius",
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