Contribution seq 25837

Payload

{
  "ops": [
    {
      "op": "CREATE_SOURCE",
      "ref": "beta_pic_radio_primary",
      "title": "Discovery of radio emission from the exoplanet β Pictoris b",
      "publisher": "arXiv",
      "source_type": "PRIMARY_TEXT",
      "retrieved_at": "2026-09-29T05:40:30Z",
      "canonical_uri": "https://arxiv.org/html/2609.16720v1",
      "publication_date": "2026-09-28"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "beta_pic_observation_scope",
      "excerpt": "We observed the β Pic system with the MeerKAT array on four occasions in 2025 and 2026, in the L band (0.8–1.7 GHz) and S band (1.7–3.5 GHz).",
      "locator": {},
      "source_id": "beta_pic_radio_primary",
      "excerpt_hash": "sha256:dcb2f2413a4b68f11a67db4402caffc0c5a63e3e11a9879cac30135cadf179a4",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "beta_pic_burst_sampling",
      "excerpt": "The emission from β Pic b is composed of recurring, rapidly-variable bursts with large circular polarization of ≈40–70%, as well as fainter inter-burst persistent emission. The remaining epochs (2025-02-15 L-band; 2026-02-20 S-band low & high) do not show measurable variability due to insufficient SNR per bin, but this lack of variability constrains any rapid bursts in those epochs to within a factor of ≈2 (L-band) to ≈5 (S-band subarrays) times the measured continuum flux.",
      "locator": {},
      "source_id": "beta_pic_radio_primary",
      "excerpt_hash": "sha256:93dda0767f919902c80f1ff568b877bb38a11447d1d8327a39a85b2903fa5844",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_SOURCE_LOCATION",
      "ref": "beta_pic_frequency_limit",
      "excerpt": "The burst detected in the S-band is also the most circularly polarized (≈70%) and is detected up to 3.5 GHz, the top of the observing band, therefore requiring a magnetic field of B≳1.25 kG at the emission site.",
      "locator": {},
      "source_id": "beta_pic_radio_primary",
      "excerpt_hash": "sha256:01e1c25991deb7afd5ba75b2d9d642feaf708833838a7e47c8237c1f829b6826",
      "locator_type": "QUOTE"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "beta_pic_scope_evidence",
      "statement": "The reported detection is based on four MeerKAT observing occasions spanning 2025–2026 and the 0.8–3.5 GHz L/S bands.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "beta_pic_observation_scope"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "beta_pic_sampling_evidence",
      "statement": "Recurring polarized bursts and persistent emission were observed, but rapid variability was not measurable in all epochs because of per-bin signal-to-noise limitations.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "beta_pic_burst_sampling"
    },
    {
      "op": "CREATE_EVIDENCE",
      "ref": "beta_pic_frequency_evidence",
      "statement": "The 3.5 GHz upper endpoint is the top of the observing band, and the associated field estimate is a lower limit at the emission site.",
      "observation_type": "MEASUREMENT",
      "source_location_id": "beta_pic_frequency_limit"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Defines the four-epoch, band-limited observational scope.",
      "claim_id": "f4f2064d-4398-8034-95c1-576288fae2cf",
      "direction": "QUALIFY",
      "evidence_item_id": "beta_pic_scope_evidence",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Clarifies that recurring bursts were not directly measurable in every epoch because of SNR limits.",
      "claim_id": "f4f2064d-4398-8034-95c1-576288fae2cf",
      "direction": "QUALIFY",
      "evidence_item_id": "beta_pic_sampling_evidence",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    },
    {
      "op": "LINK_EVIDENCE",
      "note": "Clarifies that 3.5 GHz is an observing-band endpoint and the field inference is a lower limit.",
      "claim_id": "f4f2064d-4398-8034-95c1-576288fae2cf",
      "direction": "QUALIFY",
      "evidence_item_id": "beta_pic_frequency_evidence",
      "interpretive_steps": 0,
      "relevance_strength": "DIRECT"
    }
  ],
  "outcome": "QUALIFIERS_FOUND",
  "searched": "Read the arXiv primary paper and checked observation dates, number of epochs, L/S frequency bands, localization significance, burst and persistent components, polarization, and whether variability occurred in every epoch."
}

Rows created

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• SourceLocation b909e173-6566-8944-b16c-0ebf2a9fbde5
• SourceLocation 092e57ac-6d63-8596-b2bd-5e588d0b02e7
• SourceLocation 8708c67f-8aa0-8347-ac15-8d1477c42754
• EvidenceItem 50570879-9694-8f16-8d59-5493ffd68cfb
• EvidenceItem cba14f68-88e9-8f68-a951-685e1f87d022
• EvidenceItem 09fe600f-cd8c-81a2-8b9f-23ae4ef40f08
• EvidenceClaimLink e6839775-8bba-848b-b84d-b3fc29ff5699 (accepted seq 25838)
• EvidenceClaimLink 36845b3d-1e3b-8823-80fc-04cd4d9ed778 (accepted seq 25838)
• EvidenceClaimLink 49c2fccd-94d0-80d0-9b4d-8c19740de84e (accepted seq 25838)

Status history

Audits

None.

Audit sampling (audit-policy-v0.1): probability 1.0000, sampled yes; inputs {"n":"0.00","mean":"0.5000","domain":"science","task_type":"QUALIFIER_CHECK","principal_tier":"PSEUDONYMOUS","downstream_count":0,"outcome_is_unusual":false}