{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:C2R6LMPWQOMELWRWO6HAQLB4WV","short_pith_number":"pith:C2R6LMPW","schema_version":"1.0","canonical_sha256":"16a3e5b1f6839845da36778e082c3cb5526a46b6fedd8d8106af5048a8e897cb","source":{"kind":"arxiv","id":"2605.18283","version":1},"attestation_state":"computed","paper":{"title":"Constraining the magnetic field strength of a flaring radio core in the compact steep spectrum source 3C 138","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Ruediger Kneissl, Sang-Sung Lee, Seiji Kameno, Shan Li, Tao An, Whee Yeon Cheong","submitted_at":"2026-05-18T12:13:53Z","abstract_excerpt":"Compact steep spectrum (CSS) sources generally show weak Doppler boosting, yet some exceptions show multi-year-scale radio flux variability and high-energy activity. Since 2022, the CSS quasar 3C 138 has been in a radio high state accompanied by multiple gamma-ray outbursts, offering unique opportunities to study changes in jet physical conditions. We estimated the synchrotron self-absorption (SSA) magnetic field ($B_{\\rm SSA}$) in the SSA core of 3C 138 during its high state and compared it with the equipartition magnetic field ($B_{\\rm eq}$) to assess the core field environment. Using extend"},"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":"2605.18283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-18T12:13:53Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"d9994cb58dbfe2ed5d8f5c57f5cc846841d02df2282cdc195bfe3d018537b476","abstract_canon_sha256":"9e28668ab6b215aecc0fab1e26eea0462d7cc75cb7a32798756fa5694ad2d4c9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-20T00:05:53.346254Z","signature_b64":"lh9denK/QsPffj3GfnVYmapQ2jNffioB8c4Wwtw3lH6zT+RvNzcOFXm46JMnYiW8T0XihswPDZorebpIRt7lAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16a3e5b1f6839845da36778e082c3cb5526a46b6fedd8d8106af5048a8e897cb","last_reissued_at":"2026-05-20T00:05:53.345638Z","signature_status":"signed_v1","first_computed_at":"2026-05-20T00:05:53.345638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Constraining the magnetic field strength of a flaring radio core in the compact steep spectrum source 3C 138","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"Ruediger Kneissl, Sang-Sung Lee, Seiji Kameno, Shan Li, Tao An, Whee Yeon Cheong","submitted_at":"2026-05-18T12:13:53Z","abstract_excerpt":"Compact steep spectrum (CSS) sources generally show weak Doppler boosting, yet some exceptions show multi-year-scale radio flux variability and high-energy activity. Since 2022, the CSS quasar 3C 138 has been in a radio high state accompanied by multiple gamma-ray outbursts, offering unique opportunities to study changes in jet physical conditions. We estimated the synchrotron self-absorption (SSA) magnetic field ($B_{\\rm SSA}$) in the SSA core of 3C 138 during its high state and compared it with the equipartition magnetic field ($B_{\\rm eq}$) to assess the core field environment. Using extend"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.18283","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.18283/integrity.json","findings":[],"available":true,"detectors_run":[{"name":"ai_meta_artifact","ran_at":"2026-05-19T23:33:35.231541Z","status":"skipped","version":"1.0.0","findings_count":0},{"name":"claim_evidence","ran_at":"2026-05-19T23:21:58.932339Z","status":"completed","version":"1.0.0","findings_count":0}],"snapshot_sha256":"4ba7fa8091492a90aac26064412979668faa46d71c53410aa2614cac4f60d919"},"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":"2605.18283","created_at":"2026-05-20T00:05:53.345735+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.18283v1","created_at":"2026-05-20T00:05:53.345735+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.18283","created_at":"2026-05-20T00:05:53.345735+00:00"},{"alias_kind":"pith_short_12","alias_value":"C2R6LMPWQOME","created_at":"2026-05-20T00:05:53.345735+00:00"},{"alias_kind":"pith_short_16","alias_value":"C2R6LMPWQOMELWRW","created_at":"2026-05-20T00:05:53.345735+00:00"},{"alias_kind":"pith_short_8","alias_value":"C2R6LMPW","created_at":"2026-05-20T00:05:53.345735+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/C2R6LMPWQOMELWRWO6HAQLB4WV","json":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV.json","graph_json":"https://pith.science/api/pith-number/C2R6LMPWQOMELWRWO6HAQLB4WV/graph.json","events_json":"https://pith.science/api/pith-number/C2R6LMPWQOMELWRWO6HAQLB4WV/events.json","paper":"https://pith.science/paper/C2R6LMPW"},"agent_actions":{"view_html":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV","download_json":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV.json","view_paper":"https://pith.science/paper/C2R6LMPW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.18283&json=true","fetch_graph":"https://pith.science/api/pith-number/C2R6LMPWQOMELWRWO6HAQLB4WV/graph.json","fetch_events":"https://pith.science/api/pith-number/C2R6LMPWQOMELWRWO6HAQLB4WV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV/action/storage_attestation","attest_author":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV/action/author_attestation","sign_citation":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV/action/citation_signature","submit_replication":"https://pith.science/pith/C2R6LMPWQOMELWRWO6HAQLB4WV/action/replication_record"}},"created_at":"2026-05-20T00:05:53.345735+00:00","updated_at":"2026-05-20T00:05:53.345735+00:00"}