{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:2WD7X6XMTCXVNOHGUI5UFGG5FL","short_pith_number":"pith:2WD7X6XM","canonical_record":{"source":{"id":"1107.4095","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-07-20T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"d09e304717faf525ee4efd26271ff8b2dad1ce503fdf338acbfbacabf1a7a821","abstract_canon_sha256":"a69bb38150e331c19d19b611a73b9958aac1095109acd8115ab59a16825403e3"},"schema_version":"1.0"},"canonical_sha256":"d587fbfaec98af56b8e6a23b4298dd2af80d1b8182f9c1cbef20869786e07b3a","source":{"kind":"arxiv","id":"1107.4095","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.4095","created_at":"2026-05-18T02:01:13Z"},{"alias_kind":"arxiv_version","alias_value":"1107.4095v2","created_at":"2026-05-18T02:01:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.4095","created_at":"2026-05-18T02:01:13Z"},{"alias_kind":"pith_short_12","alias_value":"2WD7X6XMTCXV","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2WD7X6XMTCXVNOHG","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2WD7X6XM","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:2WD7X6XMTCXVNOHGUI5UFGG5FL","target":"record","payload":{"canonical_record":{"source":{"id":"1107.4095","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-07-20T20:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"d09e304717faf525ee4efd26271ff8b2dad1ce503fdf338acbfbacabf1a7a821","abstract_canon_sha256":"a69bb38150e331c19d19b611a73b9958aac1095109acd8115ab59a16825403e3"},"schema_version":"1.0"},"canonical_sha256":"d587fbfaec98af56b8e6a23b4298dd2af80d1b8182f9c1cbef20869786e07b3a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:13.999662Z","signature_b64":"HCTnvjphStJ8w6+NtiNteqD6M9YUyI+TvyTy6cP/jFFTXc1cISNs5OrjKRvMaxhfar61IoaEu9noCvM3uIeGDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d587fbfaec98af56b8e6a23b4298dd2af80d1b8182f9c1cbef20869786e07b3a","last_reissued_at":"2026-05-18T02:01:13.999147Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:13.999147Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.4095","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:01:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PwNrXka1LkmTZ3keTUOVOh6yQOup3AgB9bGn47F6VRsp1RXFz8D38ASPbaILFXGhS6jnplbzNpoiW6PTgReiDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:22:01.059000Z"},"content_sha256":"c326141d271e6a244b08de55dd2f21ae222c7d2a56dac3bdd1c1768b3f22af47","schema_version":"1.0","event_id":"sha256:c326141d271e6a244b08de55dd2f21ae222c7d2a56dac3bdd1c1768b3f22af47"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:2WD7X6XMTCXVNOHGUI5UFGG5FL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Long-term evolution of massive black hole binaries. IV. Mergers of galaxies with collisionally relaxed nuclei","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alessia Gualandris, David Merritt","submitted_at":"2011-07-20T20:00:02Z","abstract_excerpt":"We simulate mergers between galaxies containing collisionally-relaxed nuclei around massive black holes (MBHs). Our galaxies contain four mass groups, representative of old stellar populations; a primary goal is to understand the distribution of stellar-mass black holes (BHs) after the merger. Mergers are followed using direct-summation N-body simulations, assuming a mass ratio of 1:3 and two different orbits. Evolution of the binary MBH is followed until its separation has shrunk by a factor of 20 below the hard-binary separation. During the galaxy merger, large cores are carved out in the st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.4095","kind":"arxiv","version":2},"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":"2026-05-18T02:01:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"78VG1cGqfh5XlQcsj7KGIPzp5oAz14h7t7ClyPqZ1TJRWWDkRKqRC1nwMLvT88dHC5UFz3+pU2ce9EcDDqoaDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T13:22:01.059361Z"},"content_sha256":"2a9b7c23a46f5ed7c70ec62c48633d7183b1d0549cffa54c8ed8ce765dd1f922","schema_version":"1.0","event_id":"sha256:2a9b7c23a46f5ed7c70ec62c48633d7183b1d0549cffa54c8ed8ce765dd1f922"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL/bundle.json","state_url":"https://pith.science/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL/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":"2026-06-02T13:22:01Z","links":{"resolver":"https://pith.science/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL","bundle":"https://pith.science/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL/bundle.json","state":"https://pith.science/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2WD7X6XMTCXVNOHGUI5UFGG5FL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:2WD7X6XMTCXVNOHGUI5UFGG5FL","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":"a69bb38150e331c19d19b611a73b9958aac1095109acd8115ab59a16825403e3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-07-20T20:00:02Z","title_canon_sha256":"d09e304717faf525ee4efd26271ff8b2dad1ce503fdf338acbfbacabf1a7a821"},"schema_version":"1.0","source":{"id":"1107.4095","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.4095","created_at":"2026-05-18T02:01:13Z"},{"alias_kind":"arxiv_version","alias_value":"1107.4095v2","created_at":"2026-05-18T02:01:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.4095","created_at":"2026-05-18T02:01:13Z"},{"alias_kind":"pith_short_12","alias_value":"2WD7X6XMTCXV","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2WD7X6XMTCXVNOHG","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2WD7X6XM","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:2a9b7c23a46f5ed7c70ec62c48633d7183b1d0549cffa54c8ed8ce765dd1f922","target":"graph","created_at":"2026-05-18T02:01:13Z","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 simulate mergers between galaxies containing collisionally-relaxed nuclei around massive black holes (MBHs). Our galaxies contain four mass groups, representative of old stellar populations; a primary goal is to understand the distribution of stellar-mass black holes (BHs) after the merger. Mergers are followed using direct-summation N-body simulations, assuming a mass ratio of 1:3 and two different orbits. Evolution of the binary MBH is followed until its separation has shrunk by a factor of 20 below the hard-binary separation. During the galaxy merger, large cores are carved out in the st","authors_text":"Alessia Gualandris, David Merritt","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-07-20T20:00:02Z","title":"Long-term evolution of massive black hole binaries. IV. Mergers of galaxies with collisionally relaxed nuclei"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.4095","kind":"arxiv","version":2},"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:c326141d271e6a244b08de55dd2f21ae222c7d2a56dac3bdd1c1768b3f22af47","target":"record","created_at":"2026-05-18T02:01:13Z","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":"a69bb38150e331c19d19b611a73b9958aac1095109acd8115ab59a16825403e3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-07-20T20:00:02Z","title_canon_sha256":"d09e304717faf525ee4efd26271ff8b2dad1ce503fdf338acbfbacabf1a7a821"},"schema_version":"1.0","source":{"id":"1107.4095","kind":"arxiv","version":2}},"canonical_sha256":"d587fbfaec98af56b8e6a23b4298dd2af80d1b8182f9c1cbef20869786e07b3a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d587fbfaec98af56b8e6a23b4298dd2af80d1b8182f9c1cbef20869786e07b3a","first_computed_at":"2026-05-18T02:01:13.999147Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:13.999147Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HCTnvjphStJ8w6+NtiNteqD6M9YUyI+TvyTy6cP/jFFTXc1cISNs5OrjKRvMaxhfar61IoaEu9noCvM3uIeGDA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:13.999662Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.4095","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c326141d271e6a244b08de55dd2f21ae222c7d2a56dac3bdd1c1768b3f22af47","sha256:2a9b7c23a46f5ed7c70ec62c48633d7183b1d0549cffa54c8ed8ce765dd1f922"],"state_sha256":"89180b525643acf3646170b6bf0f5bfb96737f1dde9d16eae62173162b6eff3e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cXPkPvl7wYQtByaPpatT/JWqqSRuOrSJZeuOOs/7HR8/ZTmKfdLlRH91bxhLHJNdJY1l+ULhHljUdSx8XNqABA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T13:22:01.061427Z","bundle_sha256":"0946a6ec4b3be2f1b26853eb833c66ec1fdff32a16f2dc8bd1bd23be9871ad4d"}}