{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:B66QBRIGCJ6TE5HCS5VAZAW74X","short_pith_number":"pith:B66QBRIG","canonical_record":{"source":{"id":"1412.4909","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T08:13:04Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"c0be637df79cf19cb1c4eb8e27bc3a71eb61cf7320cdf6323be03350357c80d9","abstract_canon_sha256":"b24c094ba3d9cc01327dcffcc64949232627a8ffc718c1400699946e2439ab83"},"schema_version":"1.0"},"canonical_sha256":"0fbd00c506127d3274e2976a0c82dfe5dcdd60ea7cd96ddfa209c4abf2aa4909","source":{"kind":"arxiv","id":"1412.4909","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4909","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4909v1","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4909","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"B66QBRIGCJ6T","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"B66QBRIGCJ6TE5HC","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"B66QBRIG","created_at":"2026-05-18T12:28:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:B66QBRIGCJ6TE5HCS5VAZAW74X","target":"record","payload":{"canonical_record":{"source":{"id":"1412.4909","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T08:13:04Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"c0be637df79cf19cb1c4eb8e27bc3a71eb61cf7320cdf6323be03350357c80d9","abstract_canon_sha256":"b24c094ba3d9cc01327dcffcc64949232627a8ffc718c1400699946e2439ab83"},"schema_version":"1.0"},"canonical_sha256":"0fbd00c506127d3274e2976a0c82dfe5dcdd60ea7cd96ddfa209c4abf2aa4909","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:22.179706Z","signature_b64":"2zW2zThD8oSVU4aWdIuSz7htmIvfEvApvS3/sWiz1ad42gQOKnR1LR8GVOQFS6jRGIQnOFUg/4x/ipqKBreCDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0fbd00c506127d3274e2976a0c82dfe5dcdd60ea7cd96ddfa209c4abf2aa4909","last_reissued_at":"2026-05-18T01:46:22.179140Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:22.179140Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.4909","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:46:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hj4baHWVnlCu5op63qKSX6tlS3pa6rH7AWhS1TdwNg9J4/E58hbBzR8rTudT4aRdCecRRyU8d4DP9r4cYfLpAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:45:51.331710Z"},"content_sha256":"ccdfa579bcd8f9c420f72d6c651d0a6f6748b73917de2a46caa494ea1d2b8236","schema_version":"1.0","event_id":"sha256:ccdfa579bcd8f9c420f72d6c651d0a6f6748b73917de2a46caa494ea1d2b8236"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:B66QBRIGCJ6TE5HCS5VAZAW74X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structure of the nucleus of 1928+738","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. Zensus, E. Kun, G. Henri, J. Roland, S. Britzen, S. Lambert","submitted_at":"2014-12-16T08:13:04Z","abstract_excerpt":"Modeling of the trajectories of VLBI components ejected by the nucleus of 1928+738 shows the VLBI jet contains three families of trajectories, i.e. VLBI components are ejected from three different origins. The fit of components C1, C6 and C8 indicates that the nucleus of 1928+738 contains two binary black hole systems. The first binary black hole system is associated with the stationary components Cg and CS and is characterized by a radius $R_{bin,1} \\approx 0.220$ mas; both black holes ejected VLBI components quasi regularly between 1990 and 2010. The second binary black hole system is not as"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4909","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:46:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WyiGBjjKELrQbswsNy8IfNTUiOma0zhodb0rx+HFzwqSD14S7M8HJWEb5z+evevUVitL62jQqEvuXI1rMCeYDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T08:45:51.332405Z"},"content_sha256":"fec89e68c86f443987059c353e341b82bc185719b2c4f71354356885caf9ff4c","schema_version":"1.0","event_id":"sha256:fec89e68c86f443987059c353e341b82bc185719b2c4f71354356885caf9ff4c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B66QBRIGCJ6TE5HCS5VAZAW74X/bundle.json","state_url":"https://pith.science/pith/B66QBRIGCJ6TE5HCS5VAZAW74X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B66QBRIGCJ6TE5HCS5VAZAW74X/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-31T08:45:51Z","links":{"resolver":"https://pith.science/pith/B66QBRIGCJ6TE5HCS5VAZAW74X","bundle":"https://pith.science/pith/B66QBRIGCJ6TE5HCS5VAZAW74X/bundle.json","state":"https://pith.science/pith/B66QBRIGCJ6TE5HCS5VAZAW74X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B66QBRIGCJ6TE5HCS5VAZAW74X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:B66QBRIGCJ6TE5HCS5VAZAW74X","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":"b24c094ba3d9cc01327dcffcc64949232627a8ffc718c1400699946e2439ab83","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T08:13:04Z","title_canon_sha256":"c0be637df79cf19cb1c4eb8e27bc3a71eb61cf7320cdf6323be03350357c80d9"},"schema_version":"1.0","source":{"id":"1412.4909","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.4909","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"arxiv_version","alias_value":"1412.4909v1","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.4909","created_at":"2026-05-18T01:46:22Z"},{"alias_kind":"pith_short_12","alias_value":"B66QBRIGCJ6T","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_16","alias_value":"B66QBRIGCJ6TE5HC","created_at":"2026-05-18T12:28:22Z"},{"alias_kind":"pith_short_8","alias_value":"B66QBRIG","created_at":"2026-05-18T12:28:22Z"}],"graph_snapshots":[{"event_id":"sha256:fec89e68c86f443987059c353e341b82bc185719b2c4f71354356885caf9ff4c","target":"graph","created_at":"2026-05-18T01:46:22Z","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":"Modeling of the trajectories of VLBI components ejected by the nucleus of 1928+738 shows the VLBI jet contains three families of trajectories, i.e. VLBI components are ejected from three different origins. The fit of components C1, C6 and C8 indicates that the nucleus of 1928+738 contains two binary black hole systems. The first binary black hole system is associated with the stationary components Cg and CS and is characterized by a radius $R_{bin,1} \\approx 0.220$ mas; both black holes ejected VLBI components quasi regularly between 1990 and 2010. The second binary black hole system is not as","authors_text":"A. Zensus, E. Kun, G. Henri, J. Roland, S. Britzen, S. Lambert","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T08:13:04Z","title":"Structure of the nucleus of 1928+738"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.4909","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:ccdfa579bcd8f9c420f72d6c651d0a6f6748b73917de2a46caa494ea1d2b8236","target":"record","created_at":"2026-05-18T01:46:22Z","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":"b24c094ba3d9cc01327dcffcc64949232627a8ffc718c1400699946e2439ab83","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T08:13:04Z","title_canon_sha256":"c0be637df79cf19cb1c4eb8e27bc3a71eb61cf7320cdf6323be03350357c80d9"},"schema_version":"1.0","source":{"id":"1412.4909","kind":"arxiv","version":1}},"canonical_sha256":"0fbd00c506127d3274e2976a0c82dfe5dcdd60ea7cd96ddfa209c4abf2aa4909","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0fbd00c506127d3274e2976a0c82dfe5dcdd60ea7cd96ddfa209c4abf2aa4909","first_computed_at":"2026-05-18T01:46:22.179140Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:22.179140Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2zW2zThD8oSVU4aWdIuSz7htmIvfEvApvS3/sWiz1ad42gQOKnR1LR8GVOQFS6jRGIQnOFUg/4x/ipqKBreCDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:22.179706Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.4909","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ccdfa579bcd8f9c420f72d6c651d0a6f6748b73917de2a46caa494ea1d2b8236","sha256:fec89e68c86f443987059c353e341b82bc185719b2c4f71354356885caf9ff4c"],"state_sha256":"a5cb5a1f78792ece0d73b1b7ade89070dc5fc4112f211ef47ed6e6b085f48252"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VtQx5qOa0WEdnFcLI1P6raDrdTLFyHhr3E3ZzQAulbBGmbFtMzIn42N+T0WgxcnTIKe9jW8xuNRF1pLteua5BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T08:45:51.336694Z","bundle_sha256":"b11fd3887b000914a65beabed28866dfa88fb3acdfaaf94d55d18ff07ac4842f"}}