{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:TLDUIXKI3SRAD7LKEZB7JRULS5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"26955dccd09232a2352bf26973245e244d6cbd3035b7bf42b8f621dd9fa21fc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-08-06T22:45:06Z","title_canon_sha256":"f0de294506448cbde09a56d8746eb79d48053a06e1a349c651809a6cce964038"},"schema_version":"1.0","source":{"id":"1308.1436","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1308.1436","created_at":"2026-05-18T01:48:22Z"},{"alias_kind":"arxiv_version","alias_value":"1308.1436v1","created_at":"2026-05-18T01:48:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1308.1436","created_at":"2026-05-18T01:48:22Z"},{"alias_kind":"pith_short_12","alias_value":"TLDUIXKI3SRA","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_16","alias_value":"TLDUIXKI3SRAD7LK","created_at":"2026-05-18T12:28:02Z"},{"alias_kind":"pith_short_8","alias_value":"TLDUIXKI","created_at":"2026-05-18T12:28:02Z"}],"graph_snapshots":[{"event_id":"sha256:33568a1f7ba4cf5fea5348d66d5bff1a44ab7a8aa172c77b31ceca2ee7c9d7ef","target":"graph","created_at":"2026-05-18T01:48:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The structure and dynamics of the M87 jet from sub-milli-arcsec to arcsecond scales are continuously examined. We analysed the VLBA archival data taken at 43 and 86 GHz to measure the size of VLBI cores. Millimeter/sub-mm VLBI cores are considered as innermost jet emissions, which has been originally suggested by Blandford & K\\\"onigl. Those components fairly follow an extrapolated parabolic streamline in our previous study so that the jet has a single power-law structure with nearly five orders of magnitude in the distance starting from the vicinity of the supermassive black hole (SMBH), less ","authors_text":"Keiichi Asada (ASIAA), Masanori Nakamura (ASIAA)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-08-06T22:45:06Z","title":"The Parabolic Jet Structure in M87 as a Magnetohydrodynamic Nozzle"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1308.1436","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:f91191e93381bcc93e241a56a1f6ff4b34319094e26bb968eedb4197efdf60f6","target":"record","created_at":"2026-05-18T01:48:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"26955dccd09232a2352bf26973245e244d6cbd3035b7bf42b8f621dd9fa21fc3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2013-08-06T22:45:06Z","title_canon_sha256":"f0de294506448cbde09a56d8746eb79d48053a06e1a349c651809a6cce964038"},"schema_version":"1.0","source":{"id":"1308.1436","kind":"arxiv","version":1}},"canonical_sha256":"9ac7445d48dca201fd6a2643f4c68b977f2ac027548d300e6d9d6643182cc2bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9ac7445d48dca201fd6a2643f4c68b977f2ac027548d300e6d9d6643182cc2bc","first_computed_at":"2026-05-18T01:48:22.919130Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:22.919130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"j7aIeeX204TOvGnU+jZH2GndZGZLS7oJCRX8dVhGWNeYebEKjKxoXEQlwoZLDrGbotciBk7adS946NeWjumnAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:22.919709Z","signed_message":"canonical_sha256_bytes"},"source_id":"1308.1436","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f91191e93381bcc93e241a56a1f6ff4b34319094e26bb968eedb4197efdf60f6","sha256:33568a1f7ba4cf5fea5348d66d5bff1a44ab7a8aa172c77b31ceca2ee7c9d7ef"],"state_sha256":"68dece8db507f01cbb4fcd1a93566a72d2f2e806b63ad4007649d0db84fc4d44"}