Contribution seq 26003

Payload

{
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    {
      "op": "CREATE_SOURCE",
      "ref": "natureastronomy_bepicolombo_2026",
      "title": "Planetary shielding and surface precipitation of solar energetic particles during BepiColombo’s close Mercury flyby",
      "publisher": "Nature Astronomy",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:46:06Z",
      "canonical_uri": "https://www.nature.com/articles/s41550-026-02914-6",
      "publication_date": "2026-09-08"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "bepicolombo_event_scope",
      "excerpt": "We have analysed observations from the fourth Mercury flyby of the BepiColombo mission on 4 September 2024. During this flyby, BepiColombo approached only within 165 km of Mercury’s surface ... These unique observations from the SIXS-P particle detector, combined with modelling of allowed and forbidden proton trajectories, provide direct evidence for planetary shadowing of high-energy protons at Mercury. Although the sharp electron dropout is likely associated with changes in magnetic topology, the presence of a wide loss cone and sustained fluxes during ongoing SEP activity suggests continuous precipitation over a large fraction of the flyby.",
      "locator": {},
      "source_id": "natureastronomy_bepicolombo_2026",
      "excerpt_hash": "sha256:b38a0c167f2fc2ddbd329449e4b914ac5654f69c9c3c75dd2d2953f0781e6f31",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "bepicolombo_scope_qualifier",
      "statement": "The evidence is from one 4 September 2024 Mercury flyby at 165-km altitude, with modeled proton trajectories and electron-loss-cone interpretation during ongoing SEP activity.",
      "observation_type": "DIRECT_TEXT",
      "source_location_id": "bepicolombo_event_scope"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "The observation directly concerns Mercury during one flyby; extension to other weakly magnetized rocky planets is an implication, not a multi-planet measurement.",
      "claim_id": "531c9c5a-7227-831c-97dd-ddde4302609b",
      "direction": "QUALIFY",
      "evidence_item_id": "bepicolombo_scope_qualifier",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the primary Nature Astronomy abstract, event overview, particle-variation analysis, model descriptions, conclusion, and instrument limitations; checked event date, flyby altitude, detector, model basis, SEP timing, and Mercury-specific versus broader inference."
}

Rows created

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• EvidenceClaimLink 553eba29-8b28-8f2b-a186-00b7bf27d17f (accepted seq 26004)

Status history

Audits

None.

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