{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2006:WCLBIJXBWAVNW7OBUBNWDCZONY","short_pith_number":"pith:WCLBIJXB","schema_version":"1.0","canonical_sha256":"b0961426e1b02adb7dc1a05b618b2e6e0cdd074f7f707826f09e1323aed0ef18","source":{"kind":"arxiv","id":"astro-ph/0609387","version":1},"attestation_state":"computed","paper":{"title":"Radio observations of candidate magnetic O stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. van der Horst, H. F. Henrichs, J. C. A. Miller-Jones, K. L. J. Rygl, R. S. Schnerr, T. A. Oosterloo","submitted_at":"2006-09-14T09:42:07Z","abstract_excerpt":"A number of O stars are suspected to have (weak) magnetic fields because of the observed cyclical variability in their UV wind-lines. However, direct detections of these magnetic fields with optical spectropolarimetry have proven to be very difficult. We have searched for non-thermal radio emission, which would be a strong indication for the presence of a magnetic field. Of our 5 selected candidate magnetic O stars, 3 are detected: $\\xi$ Per, which we find to have a non-thermal spectrum, and $\\lambda$ Cep and $\\alpha$ Cam which show a thermal spectrum. We also find that the fluxes are lower th"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/0609387","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2006-09-14T09:42:07Z","cross_cats_sorted":[],"title_canon_sha256":"b96f62a4417629ec7bf3d05eb7d8d08bb6e24eebf3054bf3afcac84569ccdeb8","abstract_canon_sha256":"7d1fd790b6b1cc8c46e76114012ca0502b6af53b47180a1515a334bb2306eddf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:15:36.390375Z","signature_b64":"Ylf6wPlnnLYVLIo2fUjwYRjdMxKerR4VgFexLcO6xMtGw0n66bp6Cl5fawSxetlArFjd0OGCaD4s3QfXuu3TCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b0961426e1b02adb7dc1a05b618b2e6e0cdd074f7f707826f09e1323aed0ef18","last_reissued_at":"2026-05-18T04:15:36.390013Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:15:36.390013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Radio observations of candidate magnetic O stars","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. van der Horst, H. F. Henrichs, J. C. A. Miller-Jones, K. L. J. Rygl, R. S. Schnerr, T. A. Oosterloo","submitted_at":"2006-09-14T09:42:07Z","abstract_excerpt":"A number of O stars are suspected to have (weak) magnetic fields because of the observed cyclical variability in their UV wind-lines. However, direct detections of these magnetic fields with optical spectropolarimetry have proven to be very difficult. We have searched for non-thermal radio emission, which would be a strong indication for the presence of a magnetic field. Of our 5 selected candidate magnetic O stars, 3 are detected: $\\xi$ Per, which we find to have a non-thermal spectrum, and $\\lambda$ Cep and $\\alpha$ Cam which show a thermal spectrum. We also find that the fluxes are lower th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0609387","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0609387","created_at":"2026-05-18T04:15:36.390067+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0609387v1","created_at":"2026-05-18T04:15:36.390067+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0609387","created_at":"2026-05-18T04:15:36.390067+00:00"},{"alias_kind":"pith_short_12","alias_value":"WCLBIJXBWAVN","created_at":"2026-05-18T12:25:54.717736+00:00"},{"alias_kind":"pith_short_16","alias_value":"WCLBIJXBWAVNW7OB","created_at":"2026-05-18T12:25:54.717736+00:00"},{"alias_kind":"pith_short_8","alias_value":"WCLBIJXB","created_at":"2026-05-18T12:25:54.717736+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY","json":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY.json","graph_json":"https://pith.science/api/pith-number/WCLBIJXBWAVNW7OBUBNWDCZONY/graph.json","events_json":"https://pith.science/api/pith-number/WCLBIJXBWAVNW7OBUBNWDCZONY/events.json","paper":"https://pith.science/paper/WCLBIJXB"},"agent_actions":{"view_html":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY","download_json":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY.json","view_paper":"https://pith.science/paper/WCLBIJXB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0609387&json=true","fetch_graph":"https://pith.science/api/pith-number/WCLBIJXBWAVNW7OBUBNWDCZONY/graph.json","fetch_events":"https://pith.science/api/pith-number/WCLBIJXBWAVNW7OBUBNWDCZONY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY/action/storage_attestation","attest_author":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY/action/author_attestation","sign_citation":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY/action/citation_signature","submit_replication":"https://pith.science/pith/WCLBIJXBWAVNW7OBUBNWDCZONY/action/replication_record"}},"created_at":"2026-05-18T04:15:36.390067+00:00","updated_at":"2026-05-18T04:15:36.390067+00:00"}