{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:G7PYQIP7CE275PJYPMWIHNUVDD","short_pith_number":"pith:G7PYQIP7","canonical_record":{"source":{"id":"1302.2509","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-11T15:45:31Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"fa7de8dca45e8300d1d154386c66ca66abc507e7a390a9a7d5c270f6a348ae60","abstract_canon_sha256":"91ea94f8a4ebefb00fe73b0208dc7509800636a7f9b173d44ae45f2db3a8cfb3"},"schema_version":"1.0"},"canonical_sha256":"37df8821ff1135febd387b2c83b69518c97e4b0afab885c73a865af5fb783011","source":{"kind":"arxiv","id":"1302.2509","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.2509","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"1302.2509v1","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.2509","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"G7PYQIP7CE27","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G7PYQIP7CE275PJY","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G7PYQIP7","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:G7PYQIP7CE275PJYPMWIHNUVDD","target":"record","payload":{"canonical_record":{"source":{"id":"1302.2509","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-11T15:45:31Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"fa7de8dca45e8300d1d154386c66ca66abc507e7a390a9a7d5c270f6a348ae60","abstract_canon_sha256":"91ea94f8a4ebefb00fe73b0208dc7509800636a7f9b173d44ae45f2db3a8cfb3"},"schema_version":"1.0"},"canonical_sha256":"37df8821ff1135febd387b2c83b69518c97e4b0afab885c73a865af5fb783011","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:34:00.938218Z","signature_b64":"UX6FVUqFAAkxLJBylzC96fEYNRCTkex5Wu4fax6e1yKBYWgLsGB0sI0yjOgwut70o06RNdCCEjoDEgwmkXTvAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"37df8821ff1135febd387b2c83b69518c97e4b0afab885c73a865af5fb783011","last_reissued_at":"2026-05-18T03:34:00.937537Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:34:00.937537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.2509","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":"2026-05-18T03:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vm6K3hzMrQGXF1VEUAViZ8YN06pVG/lrKcwGiPrFqbYFUqJHXrj8ID7XTTA6L3esz/2ad8iiC+kyzFl/1bq2DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:59:01.876028Z"},"content_sha256":"e9ed811c2ccc9ef9cd781f984e87857ddc2988d464b1cf43a126769b95db4b11","schema_version":"1.0","event_id":"sha256:e9ed811c2ccc9ef9cd781f984e87857ddc2988d464b1cf43a126769b95db4b11"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:G7PYQIP7CE275PJYPMWIHNUVDD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Dense Stellar Systems Around Galactic Massive Black Holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Italy), M. Arca-Sedda, M. Spera (Dep. of Physics, R. Capuzzo-Dolcetta, Sapienza, Universita' di Roma","submitted_at":"2013-02-11T15:45:31Z","abstract_excerpt":"The central regions of galaxies show the presence of massive black holes and/or dense stellar systems. The question about their modes of formation is still under debate. A likely explanation of the formation of the central dense stellar systems in both spiral and elliptical galaxies is based on the orbital decay of massive globular clusters in the central region of galaxies due to kinetic energy dissipation by dynamical friction. Their merging leads to the formation of a nuclear star cluster, like that of the Milky Way, where a massive black hole (Sgr A*) is also present. Actually, high precis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.2509","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":"2026-05-18T03:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PvFCIVKUj4z4k0eVIp/Vj9l/zSUomdzMlRyrBQxncuhJyrEFzOnk/TfGzLvmYCyO3bR/VSGT9Wz+ljCHH//rAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T14:59:01.876746Z"},"content_sha256":"76b784936183f58b078910e126c7999eac1d67ba496b59076da7db823612251f","schema_version":"1.0","event_id":"sha256:76b784936183f58b078910e126c7999eac1d67ba496b59076da7db823612251f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G7PYQIP7CE275PJYPMWIHNUVDD/bundle.json","state_url":"https://pith.science/pith/G7PYQIP7CE275PJYPMWIHNUVDD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G7PYQIP7CE275PJYPMWIHNUVDD/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":"2026-05-26T14:59:01Z","links":{"resolver":"https://pith.science/pith/G7PYQIP7CE275PJYPMWIHNUVDD","bundle":"https://pith.science/pith/G7PYQIP7CE275PJYPMWIHNUVDD/bundle.json","state":"https://pith.science/pith/G7PYQIP7CE275PJYPMWIHNUVDD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G7PYQIP7CE275PJYPMWIHNUVDD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:G7PYQIP7CE275PJYPMWIHNUVDD","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":"91ea94f8a4ebefb00fe73b0208dc7509800636a7f9b173d44ae45f2db3a8cfb3","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-11T15:45:31Z","title_canon_sha256":"fa7de8dca45e8300d1d154386c66ca66abc507e7a390a9a7d5c270f6a348ae60"},"schema_version":"1.0","source":{"id":"1302.2509","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.2509","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"1302.2509v1","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.2509","created_at":"2026-05-18T03:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"G7PYQIP7CE27","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G7PYQIP7CE275PJY","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G7PYQIP7","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:76b784936183f58b078910e126c7999eac1d67ba496b59076da7db823612251f","target":"graph","created_at":"2026-05-18T03:34:00Z","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 central regions of galaxies show the presence of massive black holes and/or dense stellar systems. The question about their modes of formation is still under debate. A likely explanation of the formation of the central dense stellar systems in both spiral and elliptical galaxies is based on the orbital decay of massive globular clusters in the central region of galaxies due to kinetic energy dissipation by dynamical friction. Their merging leads to the formation of a nuclear star cluster, like that of the Milky Way, where a massive black hole (Sgr A*) is also present. Actually, high precis","authors_text":"Italy), M. Arca-Sedda, M. Spera (Dep. of Physics, R. Capuzzo-Dolcetta, Sapienza, Universita' di Roma","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-11T15:45:31Z","title":"The Dense Stellar Systems Around Galactic Massive Black Holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.2509","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:e9ed811c2ccc9ef9cd781f984e87857ddc2988d464b1cf43a126769b95db4b11","target":"record","created_at":"2026-05-18T03:34:00Z","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":"91ea94f8a4ebefb00fe73b0208dc7509800636a7f9b173d44ae45f2db3a8cfb3","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-11T15:45:31Z","title_canon_sha256":"fa7de8dca45e8300d1d154386c66ca66abc507e7a390a9a7d5c270f6a348ae60"},"schema_version":"1.0","source":{"id":"1302.2509","kind":"arxiv","version":1}},"canonical_sha256":"37df8821ff1135febd387b2c83b69518c97e4b0afab885c73a865af5fb783011","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"37df8821ff1135febd387b2c83b69518c97e4b0afab885c73a865af5fb783011","first_computed_at":"2026-05-18T03:34:00.937537Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:34:00.937537Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UX6FVUqFAAkxLJBylzC96fEYNRCTkex5Wu4fax6e1yKBYWgLsGB0sI0yjOgwut70o06RNdCCEjoDEgwmkXTvAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:34:00.938218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.2509","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9ed811c2ccc9ef9cd781f984e87857ddc2988d464b1cf43a126769b95db4b11","sha256:76b784936183f58b078910e126c7999eac1d67ba496b59076da7db823612251f"],"state_sha256":"a77527bc00c07d612ab701f773c5338460e6bb9a25f7c152793bf87f5eeccfa7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f35W4ORi3+mH6m8RSj0jPy+8B7qABYUuWecHYoRNjg89q1EBBJxiPxdkK7/pJpKa8DPSObFOAaQSWZoP+4qiAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T14:59:01.880396Z","bundle_sha256":"25d3072489d725ec5fdf68cddc54facd6a06c68d028e92adaa9d2bd281d9386d"}}