{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:XEDYG3NN6FLET76F4OT53P5XD3","short_pith_number":"pith:XEDYG3NN","canonical_record":{"source":{"id":"0811.3501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-21T10:39:31Z","cross_cats_sorted":[],"title_canon_sha256":"8dd0e4372a9e764924d7e491d97f2b259e064f7348936f8fbffe18695d51f019","abstract_canon_sha256":"2752ae97d39e3752d3bbc335e229da2a6c10025ce991e7f6e9a2adcaa4f1ab05"},"schema_version":"1.0"},"canonical_sha256":"b907836dadf15649ffc5e3a7ddbfb71ec1a1acd55c4fae63dea1baa899315cf4","source":{"kind":"arxiv","id":"0811.3501","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.3501","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"0811.3501v1","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.3501","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"XEDYG3NN6FLE","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"XEDYG3NN6FLET76F","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"XEDYG3NN","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:XEDYG3NN6FLET76F4OT53P5XD3","target":"record","payload":{"canonical_record":{"source":{"id":"0811.3501","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-21T10:39:31Z","cross_cats_sorted":[],"title_canon_sha256":"8dd0e4372a9e764924d7e491d97f2b259e064f7348936f8fbffe18695d51f019","abstract_canon_sha256":"2752ae97d39e3752d3bbc335e229da2a6c10025ce991e7f6e9a2adcaa4f1ab05"},"schema_version":"1.0"},"canonical_sha256":"b907836dadf15649ffc5e3a7ddbfb71ec1a1acd55c4fae63dea1baa899315cf4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:18:13.279340Z","signature_b64":"dYb7waNR3SPoyl43EDJYyNtNPrG6zUuMGL/oI/FeoFwgwlNow6j2A2+IDjbBml74Ve09NSvyB15egweIw5f8BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b907836dadf15649ffc5e3a7ddbfb71ec1a1acd55c4fae63dea1baa899315cf4","last_reissued_at":"2026-05-18T04:18:13.278670Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:18:13.278670Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0811.3501","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":"2026-05-18T04:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K9+jkBL4ltJd+U8BNS5/9+oSSbx1YYu8u9KuwLDXP5zOqI99C0dtqZvz4PBcBG4VX+TfBUpZChkgOyz1mJluAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:58:16.461568Z"},"content_sha256":"90f2032fd5e4fbd38c709cb724203ae5c78c2e42bb4157e37d513a6b588eb934","schema_version":"1.0","event_id":"sha256:90f2032fd5e4fbd38c709cb724203ae5c78c2e42bb4157e37d513a6b588eb934"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:XEDYG3NN6FLET76F4OT53P5XD3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Merger of Massive Black Holes using N-Body Simulations with Post-Newtonian Corrections","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"David Merritt, Ingo Berentzen, Miguel Preto, Peter Berczik, Rainer Spurzem","submitted_at":"2008-11-21T10:39:31Z","abstract_excerpt":"We present preliminary results from self-consistent, high resolution direct {\\it N}-body simulations of massive black hole binaries in mergers of galactic nuclei. The dynamics of the black hole binary includes the full Post-Newtonian corrections (up to 2.5PN) to its equations of motion. We show that massive black holes starting at separations of 100 pc can evolve down to gravitational-wave-induced coalescence in less than a Hubble time. The binaries, in our models, often form with very high eccentricity and, as a result, reach separations of 50 Schwarzschild radius with eccentricities which ar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.3501","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":"2026-05-18T04:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fgJ4xB6ZwsKRumJAtqZ/jX07y7iCQh8/CoLf7BdOR9y5pQXvcC2cxAPWZ3y4lXckqx4x1mIszE9bKPNmeu1fBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T17:58:16.462180Z"},"content_sha256":"285ab4483dfb0d18cb315bc49678accf4a4b34ac522024cb5c27926d30354b4d","schema_version":"1.0","event_id":"sha256:285ab4483dfb0d18cb315bc49678accf4a4b34ac522024cb5c27926d30354b4d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XEDYG3NN6FLET76F4OT53P5XD3/bundle.json","state_url":"https://pith.science/pith/XEDYG3NN6FLET76F4OT53P5XD3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XEDYG3NN6FLET76F4OT53P5XD3/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":"2026-05-27T17:58:16Z","links":{"resolver":"https://pith.science/pith/XEDYG3NN6FLET76F4OT53P5XD3","bundle":"https://pith.science/pith/XEDYG3NN6FLET76F4OT53P5XD3/bundle.json","state":"https://pith.science/pith/XEDYG3NN6FLET76F4OT53P5XD3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XEDYG3NN6FLET76F4OT53P5XD3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:XEDYG3NN6FLET76F4OT53P5XD3","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":"2752ae97d39e3752d3bbc335e229da2a6c10025ce991e7f6e9a2adcaa4f1ab05","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-21T10:39:31Z","title_canon_sha256":"8dd0e4372a9e764924d7e491d97f2b259e064f7348936f8fbffe18695d51f019"},"schema_version":"1.0","source":{"id":"0811.3501","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.3501","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"0811.3501v1","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.3501","created_at":"2026-05-18T04:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"XEDYG3NN6FLE","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"XEDYG3NN6FLET76F","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"XEDYG3NN","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:285ab4483dfb0d18cb315bc49678accf4a4b34ac522024cb5c27926d30354b4d","target":"graph","created_at":"2026-05-18T04:18:13Z","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":"We present preliminary results from self-consistent, high resolution direct {\\it N}-body simulations of massive black hole binaries in mergers of galactic nuclei. The dynamics of the black hole binary includes the full Post-Newtonian corrections (up to 2.5PN) to its equations of motion. We show that massive black holes starting at separations of 100 pc can evolve down to gravitational-wave-induced coalescence in less than a Hubble time. The binaries, in our models, often form with very high eccentricity and, as a result, reach separations of 50 Schwarzschild radius with eccentricities which ar","authors_text":"David Merritt, Ingo Berentzen, Miguel Preto, Peter Berczik, Rainer Spurzem","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-21T10:39:31Z","title":"Merger of Massive Black Holes using N-Body Simulations with Post-Newtonian Corrections"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.3501","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":"sha256:90f2032fd5e4fbd38c709cb724203ae5c78c2e42bb4157e37d513a6b588eb934","target":"record","created_at":"2026-05-18T04:18:13Z","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":"2752ae97d39e3752d3bbc335e229da2a6c10025ce991e7f6e9a2adcaa4f1ab05","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-11-21T10:39:31Z","title_canon_sha256":"8dd0e4372a9e764924d7e491d97f2b259e064f7348936f8fbffe18695d51f019"},"schema_version":"1.0","source":{"id":"0811.3501","kind":"arxiv","version":1}},"canonical_sha256":"b907836dadf15649ffc5e3a7ddbfb71ec1a1acd55c4fae63dea1baa899315cf4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b907836dadf15649ffc5e3a7ddbfb71ec1a1acd55c4fae63dea1baa899315cf4","first_computed_at":"2026-05-18T04:18:13.278670Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:18:13.278670Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dYb7waNR3SPoyl43EDJYyNtNPrG6zUuMGL/oI/FeoFwgwlNow6j2A2+IDjbBml74Ve09NSvyB15egweIw5f8BA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:18:13.279340Z","signed_message":"canonical_sha256_bytes"},"source_id":"0811.3501","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:90f2032fd5e4fbd38c709cb724203ae5c78c2e42bb4157e37d513a6b588eb934","sha256:285ab4483dfb0d18cb315bc49678accf4a4b34ac522024cb5c27926d30354b4d"],"state_sha256":"cefee78ec493373339eed2879ff2a7a9e6ae741dda0d9ada62e68af8eb7d9948"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PBr27gelz4G50tcEdIJRyhZLtELD8I9eBWxpI+wiwuGsXWTeOB5ymz6gUSsGOSxh7lw913lPrMqO2P4YxHylAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T17:58:16.465976Z","bundle_sha256":"2017efe76c111a97dc4160850a5dafe9c7051555013e241278824da86f4dde24"}}