{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:366SKN664BK24ZJLN65URHK2KD","short_pith_number":"pith:366SKN66","canonical_record":{"source":{"id":"astro-ph/9811051","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-03T14:09:25Z","cross_cats_sorted":[],"title_canon_sha256":"58825ec47ea964442c302db190eab818acb5bac100419028d75aa64d3b111cce","abstract_canon_sha256":"99b3d01bc11ab8f90434733e19789e8c0be909d499aafa392b66997a3d34e205"},"schema_version":"1.0"},"canonical_sha256":"dfbd2537dee055ae652b6fbb489d5a50f4c3510b03fd04d43610e42ccb0ad5a3","source":{"kind":"arxiv","id":"astro-ph/9811051","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9811051","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9811051v1","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9811051","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"pith_short_12","alias_value":"366SKN664BK2","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"pith_short_16","alias_value":"366SKN664BK24ZJL","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"pith_short_8","alias_value":"366SKN66","created_at":"2026-07-04T16:07:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:366SKN664BK24ZJLN65URHK2KD","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9811051","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-03T14:09:25Z","cross_cats_sorted":[],"title_canon_sha256":"58825ec47ea964442c302db190eab818acb5bac100419028d75aa64d3b111cce","abstract_canon_sha256":"99b3d01bc11ab8f90434733e19789e8c0be909d499aafa392b66997a3d34e205"},"schema_version":"1.0"},"canonical_sha256":"dfbd2537dee055ae652b6fbb489d5a50f4c3510b03fd04d43610e42ccb0ad5a3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:07:09.697971Z","signature_b64":"Qq7JjvI2lgYMLaTkammyaRtOJH+wovsJFGCWwW90k/1L2jJv8NG0tj9hofLdR3Kfv0ZWjvTMTMv7DmRrV0NQBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dfbd2537dee055ae652b6fbb489d5a50f4c3510b03fd04d43610e42ccb0ad5a3","last_reissued_at":"2026-07-04T16:07:09.697530Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:07:09.697530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9811051","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":"2026-07-04T16:07:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q2caKbPldUj+mXIhC+t5oi9Y6Z8rZiHqUP2z7+NwCM9V+8ROjGheu/yZ+Ge5PjWtL8MnbqfHztw7G2ikdR7cDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T00:35:17.185534Z"},"content_sha256":"3c5e2deede36376b2e16613aff90fd7598e8166e57858e018792b07b74241002","schema_version":"1.0","event_id":"sha256:3c5e2deede36376b2e16613aff90fd7598e8166e57858e018792b07b74241002"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:366SKN664BK24ZJLN65URHK2KD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Centaurus A - NGC 5128","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"F.P. Israel (Sterrewacht Leiden)","submitted_at":"1998-11-03T14:09:25Z","abstract_excerpt":"This review summarizes the state of the knowledge of the nearby (D = 3.4 Mpc) radio source Centaurus A and its host galaxy NGC 5128. The massive elliptical host galaxy appears to be moderately triaxial. It contains a strongly warped thin disk, rich in gas, dust and young stars, and roughly aligned with the minor axis of the elliptical galaxy. This and other evidence suggests that NGC 5128 has experienced a major merger at least once in its past. The subparsec nucleus is variable at radio and X-ray wavelengths and is probably powered by accretion onto a black hole of moderate mass. HI and molec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9811051","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/astro-ph/9811051/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T16:07:09Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kRz4jp40DFRu7a//e5Zf4zBEFL3utnJRx7ajn0uWQ5yrU/2JnFzAjA89THP+CjhKQbA8ArNKYm/3N0pYhJc1Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T00:35:17.185910Z"},"content_sha256":"c5f6532621ece6f8906f25bd05f7e78cf125f432bd9e6ddf820811cca125f0a1","schema_version":"1.0","event_id":"sha256:c5f6532621ece6f8906f25bd05f7e78cf125f432bd9e6ddf820811cca125f0a1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/366SKN664BK24ZJLN65URHK2KD/bundle.json","state_url":"https://pith.science/pith/366SKN664BK24ZJLN65URHK2KD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/366SKN664BK24ZJLN65URHK2KD/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":"2026-08-23T00:35:17Z","links":{"resolver":"https://pith.science/pith/366SKN664BK24ZJLN65URHK2KD","bundle":"https://pith.science/pith/366SKN664BK24ZJLN65URHK2KD/bundle.json","state":"https://pith.science/pith/366SKN664BK24ZJLN65URHK2KD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/366SKN664BK24ZJLN65URHK2KD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:366SKN664BK24ZJLN65URHK2KD","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":"99b3d01bc11ab8f90434733e19789e8c0be909d499aafa392b66997a3d34e205","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-03T14:09:25Z","title_canon_sha256":"58825ec47ea964442c302db190eab818acb5bac100419028d75aa64d3b111cce"},"schema_version":"1.0","source":{"id":"astro-ph/9811051","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9811051","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9811051v1","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9811051","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"pith_short_12","alias_value":"366SKN664BK2","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"pith_short_16","alias_value":"366SKN664BK24ZJL","created_at":"2026-07-04T16:07:09Z"},{"alias_kind":"pith_short_8","alias_value":"366SKN66","created_at":"2026-07-04T16:07:09Z"}],"graph_snapshots":[{"event_id":"sha256:c5f6532621ece6f8906f25bd05f7e78cf125f432bd9e6ddf820811cca125f0a1","target":"graph","created_at":"2026-07-04T16:07:09Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/9811051/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This review summarizes the state of the knowledge of the nearby (D = 3.4 Mpc) radio source Centaurus A and its host galaxy NGC 5128. The massive elliptical host galaxy appears to be moderately triaxial. It contains a strongly warped thin disk, rich in gas, dust and young stars, and roughly aligned with the minor axis of the elliptical galaxy. This and other evidence suggests that NGC 5128 has experienced a major merger at least once in its past. The subparsec nucleus is variable at radio and X-ray wavelengths and is probably powered by accretion onto a black hole of moderate mass. HI and molec","authors_text":"F.P. Israel (Sterrewacht Leiden)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-11-03T14:09:25Z","title":"Centaurus A - NGC 5128"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9811051","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":"sha256:3c5e2deede36376b2e16613aff90fd7598e8166e57858e018792b07b74241002","target":"record","created_at":"2026-07-04T16:07:09Z","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":"99b3d01bc11ab8f90434733e19789e8c0be909d499aafa392b66997a3d34e205","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-11-03T14:09:25Z","title_canon_sha256":"58825ec47ea964442c302db190eab818acb5bac100419028d75aa64d3b111cce"},"schema_version":"1.0","source":{"id":"astro-ph/9811051","kind":"arxiv","version":1}},"canonical_sha256":"dfbd2537dee055ae652b6fbb489d5a50f4c3510b03fd04d43610e42ccb0ad5a3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dfbd2537dee055ae652b6fbb489d5a50f4c3510b03fd04d43610e42ccb0ad5a3","first_computed_at":"2026-07-04T16:07:09.697530Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:07:09.697530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qq7JjvI2lgYMLaTkammyaRtOJH+wovsJFGCWwW90k/1L2jJv8NG0tj9hofLdR3Kfv0ZWjvTMTMv7DmRrV0NQBQ==","signature_status":"signed_v1","signed_at":"2026-07-04T16:07:09.697971Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9811051","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3c5e2deede36376b2e16613aff90fd7598e8166e57858e018792b07b74241002","sha256:c5f6532621ece6f8906f25bd05f7e78cf125f432bd9e6ddf820811cca125f0a1"],"state_sha256":"510facac1d5cc1b40b9b41a7401d414e97999120c301309fe3396594769c20f0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zgVgZLQEirgy3Xtbf6Ooo9C/gYU/hhKujNa4KIBa4gu/DEvK0BSY4axOGIKHC1CgZ5iBYU/wpZP8v3FlAiFtDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T00:35:17.188552Z","bundle_sha256":"cd01e6aa50bf03bdbe5852657550cf1e5e9181a4b4ac0af411dd2a6200e64c67"}}