{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2007:WRH35FGL6A4N2OT6YSRQZ3ORU5","short_pith_number":"pith:WRH35FGL","schema_version":"1.0","canonical_sha256":"b44fbe94cbf038dd3a7ec4a30cedd1a76cb738927a54ed088d38910c054bf507","source":{"kind":"arxiv","id":"astro-ph/0701511","version":1},"attestation_state":"computed","paper":{"title":"High Frequency VLBI Imaging of the Jet Base of M87","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Chun Ly (UCLA), R. Craig Walker (NRA0), William Junor (LANL)","submitted_at":"2007-01-17T21:08:11Z","abstract_excerpt":"VLBA and Global VLBI observations of M87 at 43 GHz, some new and some previously published, are used to study the structural evolution of the jet with a spatial resolution of under 100 Schwarzschild radii. The images, taken between 1999 and 2004, have an angular resolution of 0.00043\" x 0.00021\". An edge-brightened jet structure and an indication of a large opening angle at the jet base are seen in all five epochs. In addition, a probable counter-jet is seen in the latter three epochs. A 22 GHz VLBA image also confirms many of the structures seen at the higher frequency, including the counter-"},"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/0701511","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-01-17T21:08:11Z","cross_cats_sorted":[],"title_canon_sha256":"e88ca0b6847630075c28bc14d3ef3df3fb964253c9218bee1b36e277254e03b1","abstract_canon_sha256":"c6f9a10fda33d3b4f05522c54f5e0ae9723686c19738bb30a4e08f12884b54e0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:29:07.154859Z","signature_b64":"MO3hWd+HTi6YU3PAzh1MWt+HKGDS2AaEQMMplC8t+beLVgUKNewqpA/6nxp0ltw0wzWEq/eiJ1M5m34N7hGsDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b44fbe94cbf038dd3a7ec4a30cedd1a76cb738927a54ed088d38910c054bf507","last_reissued_at":"2026-05-18T04:29:07.154420Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:29:07.154420Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"High Frequency VLBI Imaging of the Jet Base of M87","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Chun Ly (UCLA), R. Craig Walker (NRA0), William Junor (LANL)","submitted_at":"2007-01-17T21:08:11Z","abstract_excerpt":"VLBA and Global VLBI observations of M87 at 43 GHz, some new and some previously published, are used to study the structural evolution of the jet with a spatial resolution of under 100 Schwarzschild radii. The images, taken between 1999 and 2004, have an angular resolution of 0.00043\" x 0.00021\". An edge-brightened jet structure and an indication of a large opening angle at the jet base are seen in all five epochs. In addition, a probable counter-jet is seen in the latter three epochs. A 22 GHz VLBA image also confirms many of the structures seen at the higher frequency, including the counter-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0701511","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/0701511","created_at":"2026-05-18T04:29:07.154477+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0701511v1","created_at":"2026-05-18T04:29:07.154477+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0701511","created_at":"2026-05-18T04:29:07.154477+00:00"},{"alias_kind":"pith_short_12","alias_value":"WRH35FGL6A4N","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_16","alias_value":"WRH35FGL6A4N2OT6","created_at":"2026-05-18T12:25:56.245647+00:00"},{"alias_kind":"pith_short_8","alias_value":"WRH35FGL","created_at":"2026-05-18T12:25:56.245647+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/WRH35FGL6A4N2OT6YSRQZ3ORU5","json":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5.json","graph_json":"https://pith.science/api/pith-number/WRH35FGL6A4N2OT6YSRQZ3ORU5/graph.json","events_json":"https://pith.science/api/pith-number/WRH35FGL6A4N2OT6YSRQZ3ORU5/events.json","paper":"https://pith.science/paper/WRH35FGL"},"agent_actions":{"view_html":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5","download_json":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5.json","view_paper":"https://pith.science/paper/WRH35FGL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0701511&json=true","fetch_graph":"https://pith.science/api/pith-number/WRH35FGL6A4N2OT6YSRQZ3ORU5/graph.json","fetch_events":"https://pith.science/api/pith-number/WRH35FGL6A4N2OT6YSRQZ3ORU5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5/action/storage_attestation","attest_author":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5/action/author_attestation","sign_citation":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5/action/citation_signature","submit_replication":"https://pith.science/pith/WRH35FGL6A4N2OT6YSRQZ3ORU5/action/replication_record"}},"created_at":"2026-05-18T04:29:07.154477+00:00","updated_at":"2026-05-18T04:29:07.154477+00:00"}