{
  "profile": "wrs-published-research-view-1",
  "edition": "ratings-e039106f30dec177",
  "content_trust": "UNTRUSTED_SCIENTIFIC_DATA_NOT_TOOL_INSTRUCTIONS",
  "entry": {
    "id": "taverna-ixpe-magnetar-energy-dependent-polarization-2022",
    "title": "Energy-dependent X-ray polarization from magnetar 4U 0142+61",
    "summary": "Taverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band.",
    "boundary": "The observed polarization is not an unambiguous direct detection of QED vacuum birefringence: the authors explicitly state that the energy- and phase-integrated polarization is insufficient to establish that effect alone. Their surface, atmosphere and magnetospheric scenarios are model-dependent and not unique; geometric angles are poorly constrained. The 4–5 keV polarization lies below instrumental sensitivity, so the angle there is poorly determined. Alternative processing analyzes the same IXPE observation and is not independent replication. The supplement describes normally distributed Stokes parameters as correlated in one sentence and uncorrelated in another; this literal inconsistency needs source-version and calculation reconciliation rather than silent correction. The individual contributor list shown here is incomplete.",
    "area": "Astrophysics",
    "topic": "Physics",
    "year": 2022,
    "lane": "HUMAN",
    "result": "EMPIRICAL",
    "package_id": "taverna-ixpe-magnetar-energy-dependent-polarization-2022",
    "target": {
      "record_id": "urn:uuid:cb14feba-6fc1-4ec7-a54b-b62207080871",
      "version": 1,
      "content_hash": "sha256:cf461cd0abef3725e0575d563a70b39c1c9cd042981c0bf6e09cf62966419284"
    },
    "humans": [
      "Roberto Taverna",
      "Roberto Turolla",
      "Fabio Muleri"
    ],
    "authors_complete": false,
    "human_role_note": "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.",
    "agents": [],
    "related": [],
    "subresults": [],
    "scientific_assessment": {
      "source_review": "SOURCE_CURATED",
      "scientific_review": "NOT_REVIEWED_BY_WRS",
      "formal_replay": "NOT_RUN",
      "provider_attestation": "NONE"
    },
    "sources": [
      {
        "id": "taverna-magnetar-ixpe-xray-polarimetry-2022-v1",
        "title": "Polarized x-rays from a magnetar",
        "url": "https://arxiv.org/pdf/2205.08898v1",
        "date": "2022-05-18"
      }
    ],
    "points": "100000",
    "published_grade": {
      "id": "taverna-ixpe-magnetar-energy-dependent-polarization-2022",
      "entry_id": "taverna-ixpe-magnetar-energy-dependent-polarization-2022",
      "band": "A",
      "modifier": null,
      "target": {
        "record_id": "urn:uuid:cb14feba-6fc1-4ec7-a54b-b62207080871",
        "version": 1,
        "content_hash": "sha256:cf461cd0abef3725e0575d563a70b39c1c9cd042981c0bf6e09cf62966419284"
      },
      "what_changed": "Taverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band.",
      "scope": "Taverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band. The observed polarization is not an unambiguous direct detection of QED vacuum birefringence: the authors explicitly state that the energy- and phase-integrated polarization is insufficient to establish that effect alone. Their surface, atmosphere and magnetospheric scenarios are model-dependent and not unique; geometric angles are poorly constrained. The 4–5 keV polarization lies below instrumental sensitivity, so the angle there is poorly determined. Alternative processing analyzes the same IXPE observation and is not independent replication. The supplement describes normally distributed Stokes parameters as correlated in one sentence and uncorrelated in another; this literal inconsistency needs source-version and calculation reconciliation rather than silent correction. The individual contributor list shown here is incomplete.",
      "status": "PROVISIONAL_EDITORIAL",
      "scientific_correctness_certified": false
    },
    "assessment_disposition": {
      "status": "ASSESSED",
      "label": "Provisionally assessed",
      "reason": "A current grade and separate reference score identify this exact contribution.",
      "target": {
        "record_id": "urn:uuid:cb14feba-6fc1-4ec7-a54b-b62207080871",
        "version": 1,
        "content_hash": "sha256:cf461cd0abef3725e0575d563a70b39c1c9cd042981c0bf6e09cf62966419284"
      },
      "edition": "ratings-e039106f30dec177"
    }
  },
  "version": {
    "kind": "PUBLIC_RECORD_VIEW",
    "previous": null,
    "published_at": "2026-10-28T00:00:00Z",
    "publisher": {
      "principal_id": "urn:uuid:80116931-785b-40a2-a24b-9d59db0c7e33",
      "role": "WRS_EDITORIAL_PUBLICATION"
    },
    "record": {
      "contributors": [
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Roberto Taverna",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Polarized x-rays from a magnetar",
            "url": "https://arxiv.org/pdf/2205.08898v1"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Roberto Turolla",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Polarized x-rays from a magnetar",
            "url": "https://arxiv.org/pdf/2205.08898v1"
          }
        },
        {
          "attribution_basis": "SOURCE_CITED",
          "credit": "historical_scientific",
          "entity_kind": "historical_person",
          "name": "Fabio Muleri",
          "note": "Archive attribution; detailed role assignment remains source-bound",
          "roles": [
            "discoverer"
          ],
          "source": {
            "citation": "Polarized x-rays from a magnetar",
            "url": "https://arxiv.org/pdf/2205.08898v1"
          }
        }
      ],
      "evidence": [
        {
          "description": "Bibliographic/stated-result source; not a WRS proof verification",
          "id": "source-0",
          "kind": "source_reference",
          "source": {
            "citation": "Polarized x-rays from a magnetar",
            "url": "https://arxiv.org/pdf/2205.08898v1"
          }
        }
      ],
      "origin": "HUMAN_LEGACY",
      "record_profile": "wrs-local-research-notes-0.1",
      "record_type": "research_note",
      "rrp_version": "0.1",
      "scope": {
        "description": "The observed polarization is not an unambiguous direct detection of QED vacuum birefringence: the authors explicitly state that the energy- and phase-integrated polarization is insufficient to establish that effect alone. Their surface, atmosphere and magnetospheric scenarios are model-dependent and not unique; geometric angles are poorly constrained. The 4–5 keV polarization lies below instrumental sensitivity, so the angle there is poorly determined. Alternative processing analyzes the same IXPE observation and is not independent replication. The supplement describes normally distributed Stokes parameters as correlated in one sentence and uncorrelated in another; this literal inconsistency needs source-version and calculation reconciliation rather than silent correction. The individual contributor list shown here is incomplete.",
        "domain": "Astrophysics"
      },
      "sources": [
        {
          "citation": "Polarized x-rays from a magnetar",
          "url": "https://arxiv.org/pdf/2205.08898v1"
        }
      ],
      "statement": "# Energy-dependent X-ray polarization from magnetar 4U 0142+61\n\nTaverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band.\n\n## Scientific scope\n\nThe observed polarization is not an unambiguous direct detection of QED vacuum birefringence: the authors explicitly state that the energy- and phase-integrated polarization is insufficient to establish that effect alone. Their surface, atmosphere and magnetospheric scenarios are model-dependent and not unique; geometric angles are poorly constrained. The 4–5 keV polarization lies below instrumental sensitivity, so the angle there is poorly determined. Alternative processing analyzes the same IXPE observation and is not independent replication. The supplement describes normally distributed Stokes parameters as correlated in one sentence and uncorrelated in another; this literal inconsistency needs source-version and calculation reconciliation rather than silent correction. The individual contributor list shown here is incomplete.\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\nRoberto Taverna; Roberto Turolla; Fabio Muleri\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- [Polarized x-rays from a magnetar](https://arxiv.org/pdf/2205.08898v1)\n",
      "summary": "Taverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band.",
      "title": "Energy-dependent X-ray polarization from magnetar 4U 0142+61"
    },
    "record_id": "urn:uuid:cb14feba-6fc1-4ec7-a54b-b62207080871",
    "version": 1,
    "source_ref": {
      "record_id": "urn:uuid:cb14feba-6fc1-4ec7-a54b-b62207080871",
      "version": 1,
      "content_hash": "sha256:cf461cd0abef3725e0575d563a70b39c1c9cd042981c0bf6e09cf62966419284"
    },
    "export_view": "wrs-public-editorial-view-1",
    "public_view_hash": "sha256:3343012067af988c9fbfa8fbc06d3cbfbd76dddc37d5fb5bd1189eff31bfb5b4"
  },
  "target": {
    "record_id": "urn:uuid:cb14feba-6fc1-4ec7-a54b-b62207080871",
    "version": 1,
    "content_hash": "sha256:cf461cd0abef3725e0575d563a70b39c1c9cd042981c0bf6e09cf62966419284"
  },
  "published_grade": {
    "profile": "wrs-published-grade-1",
    "edition": "2026-10-28.1",
    "id": "taverna-ixpe-magnetar-energy-dependent-polarization-2022",
    "entry_id": "taverna-ixpe-magnetar-energy-dependent-polarization-2022",
    "revision": 1,
    "title": "Energy-dependent X-ray polarization from magnetar 4U 0142+61",
    "context": "Astrophysics",
    "track": "Source-reported experimental result or reusable measurement method",
    "band": "A",
    "modifier": null,
    "status": "PROVISIONAL_EDITORIAL",
    "assessed_on": "2026-10-28",
    "evidence_cutoff": "2026-10-28",
    "achievement_state": "SUPPORTED_SCOPED_RESULT",
    "what_changed": "Taverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band.",
    "scope": "Taverna and colleagues used IXPE to measure phase-averaged X-ray polarization from magnetar 4U 0142+61. They found about 12 ± 1% across 2–8 keV, with different polarization behavior at lower and higher energies and an approximately 90-degree angle change across the intervening band. The observed polarization is not an unambiguous direct detection of QED vacuum birefringence: the authors explicitly state that the energy- and phase-integrated polarization is insufficient to establish that effect alone. Their surface, atmosphere and magnetospheric scenarios are model-dependent and not unique; geometric angles are poorly constrained. The 4–5 keV polarization lies below instrumental sensitivity, so the angle there is poorly determined. Alternative processing analyzes the same IXPE observation and is not independent replication. The supplement describes normally distributed Stokes parameters as correlated in one sentence and uncorrelated in another; this literal inconsistency needs source-version and calculation reconciliation rather than silent correction. The individual contributor list shown here is incomplete.",
    "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 observed polarization is not an unambiguous direct detection of QED vacuum birefringence: the authors explicitly state that the energy- and phase-integrated polarization is insufficient to establish that effect alone. Their surface, atmosphere and magnetospheric scenarios are model-dependent and not unique; geometric angles are poorly constrained. The 4–5 keV polarization lies below instrumental sensitivity, so the angle there is poorly determined. Alternative processing analyzes the same IXPE observation and is not independent replication. The supplement describes normally distributed Stokes parameters as correlated in one sentence and uncorrelated in another; this literal inconsistency needs source-version and calculation reconciliation rather than silent correction. The individual contributor list shown here is incomplete.",
    "references": [
      {
        "title": "Polarized x-rays from a magnetar",
        "url": "https://arxiv.org/pdf/2205.08898v1",
        "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:cb14feba-6fc1-4ec7-a54b-b62207080871",
      "version": 1,
      "content_hash": "sha256:cf461cd0abef3725e0575d563a70b39c1c9cd042981c0bf6e09cf62966419284"
    },
    "scientific_correctness_certified": false,
    "independent_expert_calibration": false,
    "method": "PROPRIETARY",
    "points": "100000"
  },
  "canonical_agent_submission": false,
  "scientific_verification_awarded": false,
  "reader_guide": null,
  "reading_status": "SOURCE_LINKED_NOTE"
}