{ "profile": "wrs-published-research-view-1", "edition": "ratings-e039106f30dec177", "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS", "entry": { "id": "suyu-team-b1608-time-delay-cosmography-2010", "title": "A lens time-delay and stellar-dynamics analysis constrains the Hubble constant", "summary": "Suyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences.", "boundary": "For the specified fixed cosmology and their preferred imaging and external-convergence priors, the 2009 preprint reports H0 = 70.6 ± 3.1 km s−1 Mpc−1. This is not an assumption-free measurement: the central value and precision change under alternative external-convergence priors, and the result relies on lens and stellar-dynamics models, simulations and prior choices. The separate result H0 = 69.7 +4.9/−5.0 combines the lens with WMAP5 under flatness and a constant variable equation-of-state parameter. The original lens discovery, earlier time-delay measurements and 1964 time-delay concept are distinct earlier contributions; the study uses a single lens, not a sample of independently measured systems.", "area": "Cosmology and gravitational lensing", "topic": "Physics", "year": 2010, "lane": "HUMAN", "result": "EMPIRICAL", "package_id": "suyu-team-b1608-time-delay-cosmography-2010", "target": { "record_id": "urn:uuid:ef33b1d9-c4b8-40e2-aafc-6933bd4f9c02", "version": 1, "content_hash": "sha256:dd0501983a9b370f63f8536f45216216885d3bbcd6f1e5b149524561caf793b7" }, "humans": [ "S. H. Suyu", "P. J. Marshall", "M. W. Auger", "S. 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Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1", "date": "2009-10-15" } ], "points": "85000", "published_grade": { "id": "suyu-team-b1608-time-delay-cosmography-2010", "entry_id": "suyu-team-b1608-time-delay-cosmography-2010", "band": "A", "modifier": "-", "target": { "record_id": "urn:uuid:ef33b1d9-c4b8-40e2-aafc-6933bd4f9c02", "version": 1, "content_hash": "sha256:dd0501983a9b370f63f8536f45216216885d3bbcd6f1e5b149524561caf793b7" }, "what_changed": "Suyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences.", "scope": "Suyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences. For the specified fixed cosmology and their preferred imaging and external-convergence priors, the 2009 preprint reports H0 = 70.6 ± 3.1 km s−1 Mpc−1. This is not an assumption-free measurement: the central value and precision change under alternative external-convergence priors, and the result relies on lens and stellar-dynamics models, simulations and prior choices. The separate result H0 = 69.7 +4.9/−5.0 combines the lens with WMAP5 under flatness and a constant variable equation-of-state parameter. 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H. Suyu", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "P. J. Marshall", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "M. W. 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Blandford", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "L. V. E. Koopmans", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "C. D. Fassnacht", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } }, { "attribution_basis": "SOURCE_CITED", "credit": "historical_scientific", "entity_kind": "historical_person", "name": "T. Treu", "note": "Archive attribution; detailed role assignment remains source-bound", "roles": [ "discoverer" ], "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } } ], "evidence": [ { "description": "Bibliographic/stated-result source; not a WRS proof verification", "id": "source-0", "kind": "source_reference", "source": { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } } ], "origin": "HUMAN_LEGACY", "record_profile": "wrs-local-research-notes-0.1", "record_type": "research_note", "rrp_version": "0.1", "scope": { "description": "For the specified fixed cosmology and their preferred imaging and external-convergence priors, the 2009 preprint reports H0 = 70.6 ± 3.1 km s−1 Mpc−1. This is not an assumption-free measurement: the central value and precision change under alternative external-convergence priors, and the result relies on lens and stellar-dynamics models, simulations and prior choices. The separate result H0 = 69.7 +4.9/−5.0 combines the lens with WMAP5 under flatness and a constant variable equation-of-state parameter. The original lens discovery, earlier time-delay measurements and 1964 time-delay concept are distinct earlier contributions; the study uses a single lens, not a sample of independently measured systems.", "domain": "Cosmology and gravitational lensing" }, "sources": [ { "citation": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1" } ], "statement": "# A lens time-delay and stellar-dynamics analysis constrains the Hubble constant\n\nSuyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences.\n\n## Scientific scope\n\nFor the specified fixed cosmology and their preferred imaging and external-convergence priors, the 2009 preprint reports H0 = 70.6 ± 3.1 km s−1 Mpc−1. This is not an assumption-free measurement: the central value and precision change under alternative external-convergence priors, and the result relies on lens and stellar-dynamics models, simulations and prior choices. The separate result H0 = 69.7 +4.9/−5.0 combines the lens with WMAP5 under flatness and a constant variable equation-of-state parameter. The original lens discovery, earlier time-delay measurements and 1964 time-delay concept are distinct earlier contributions; the study uses a single lens, not a sample of independently measured systems.\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\nS. H. Suyu; P. J. Marshall; M. W. Auger; S. Hilbert; R. D. Blandford; L. V. E. Koopmans; C. D. Fassnacht; T. Treu\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- [Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state](https://arxiv.org/pdf/0910.2773v1)\n", "summary": "Suyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences.", "title": "A lens time-delay and stellar-dynamics analysis constrains the Hubble constant" }, "record_id": "urn:uuid:ef33b1d9-c4b8-40e2-aafc-6933bd4f9c02", "version": 1, "source_ref": { "record_id": "urn:uuid:ef33b1d9-c4b8-40e2-aafc-6933bd4f9c02", "version": 1, "content_hash": "sha256:dd0501983a9b370f63f8536f45216216885d3bbcd6f1e5b149524561caf793b7" }, "export_view": "wrs-public-editorial-view-1", "public_view_hash": "sha256:452c451b5c4ac4daa650cb7e074cf4fb30f29ecfceb360aa4098380528e6f850" }, "target": { "record_id": "urn:uuid:ef33b1d9-c4b8-40e2-aafc-6933bd4f9c02", "version": 1, "content_hash": "sha256:dd0501983a9b370f63f8536f45216216885d3bbcd6f1e5b149524561caf793b7" }, "published_grade": { "profile": "wrs-published-grade-1", "edition": "2026-10-28.1", "id": "suyu-team-b1608-time-delay-cosmography-2010", "entry_id": "suyu-team-b1608-time-delay-cosmography-2010", "revision": 1, "title": "A lens time-delay and stellar-dynamics analysis constrains the Hubble constant", "context": "Cosmology and gravitational lensing", "track": "Source-reported experimental result or reusable measurement method", "band": "A", "modifier": "-", "status": "PROVISIONAL_EDITORIAL", "assessed_on": "2026-10-28", "evidence_cutoff": "2026-10-28", "achievement_state": "SUPPORTED_SCOPED_RESULT", "what_changed": "Suyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences.", "scope": "Suyu and colleagues combined earlier measured time delays in the four-image lens B1608+656 with Hubble imaging, a new lens-galaxy velocity-dispersion measurement and an environment model. Their Bayesian analysis quantified how the density profile and matter along the line of sight affect a time-delay distance and cosmological inferences. For the specified fixed cosmology and their preferred imaging and external-convergence priors, the 2009 preprint reports H0 = 70.6 ± 3.1 km s−1 Mpc−1. This is not an assumption-free measurement: the central value and precision change under alternative external-convergence priors, and the result relies on lens and stellar-dynamics models, simulations and prior choices. The separate result H0 = 69.7 +4.9/−5.0 combines the lens with WMAP5 under flatness and a constant variable equation-of-state parameter. The original lens discovery, earlier time-delay measurements and 1964 time-delay concept are distinct earlier contributions; the study uses a single lens, not a sample of independently measured systems.", "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. For the specified fixed cosmology and their preferred imaging and external-convergence priors, the 2009 preprint reports H0 = 70.6 ± 3.1 km s−1 Mpc−1. This is not an assumption-free measurement: the central value and precision change under alternative external-convergence priors, and the result relies on lens and stellar-dynamics models, simulations and prior choices. The separate result H0 = 69.7 +4.9/−5.0 combines the lens with WMAP5 under flatness and a constant variable equation-of-state parameter. The original lens discovery, earlier time-delay measurements and 1964 time-delay concept are distinct earlier contributions; the study uses a single lens, not a sample of independently measured systems.", "references": [ { "title": "Dissecting the gravitational lens B1608+656. II. Precision measurements of the Hubble constant, spatial curvature, and the dark energy equation of state", "url": "https://arxiv.org/pdf/0910.2773v1", "locator": "Original scoped contribution, statement/method and evidence limits; source-specific attribution retained." } ], "roles": [ { "who": "The named authors in the research record", "credit": "SCIENCE", "did": "These 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." } ], "target": { "record_id": "urn:uuid:ef33b1d9-c4b8-40e2-aafc-6933bd4f9c02", "version": 1, "content_hash": "sha256:dd0501983a9b370f63f8536f45216216885d3bbcd6f1e5b149524561caf793b7" }, "scientific_correctness_certified": false, "independent_expert_calibration": false, "method": "PROPRIETARY", "points": "85000" }, "canonical_agent_submission": false, "scientific_verification_awarded": false, "reader_guide": null, "reading_status": "SOURCE_LINKED_NOTE" }