{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:BV4ALNDKVOHMHAKLUG4OMAOD2T","short_pith_number":"pith:BV4ALNDK","canonical_record":{"source":{"id":"1908.04283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T17:54:27Z","cross_cats_sorted":[],"title_canon_sha256":"9ad0bbf4ab8f64edbb13b48d1afe7031c34cbc43809a574572e6c19166f0d974","abstract_canon_sha256":"5a3619a91ad10ec7d9a44f17268bc86dbef668464ba82e28582c6531170737c6"},"schema_version":"1.0"},"canonical_sha256":"0d7805b46aab8ec3814ba1b8e601c3d4d7f7cdcdc2a84be3fe4d67cbc087537b","source":{"kind":"arxiv","id":"1908.04283","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.04283","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"arxiv_version","alias_value":"1908.04283v1","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.04283","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"pith_short_12","alias_value":"BV4ALNDKVOHM","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"pith_short_16","alias_value":"BV4ALNDKVOHMHAKL","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"pith_short_8","alias_value":"BV4ALNDK","created_at":"2026-07-05T00:48:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:BV4ALNDKVOHMHAKLUG4OMAOD2T","target":"record","payload":{"canonical_record":{"source":{"id":"1908.04283","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T17:54:27Z","cross_cats_sorted":[],"title_canon_sha256":"9ad0bbf4ab8f64edbb13b48d1afe7031c34cbc43809a574572e6c19166f0d974","abstract_canon_sha256":"5a3619a91ad10ec7d9a44f17268bc86dbef668464ba82e28582c6531170737c6"},"schema_version":"1.0"},"canonical_sha256":"0d7805b46aab8ec3814ba1b8e601c3d4d7f7cdcdc2a84be3fe4d67cbc087537b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:48:42.408212Z","signature_b64":"3dDoPoRYHJiZlJiAfkptPOOWd/4BcD9Tbye1QzPJKWp7owB7AHRRJ0GWUPFOfel7QvYEkGD/s3CP+CLqFEjiAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0d7805b46aab8ec3814ba1b8e601c3d4d7f7cdcdc2a84be3fe4d67cbc087537b","last_reissued_at":"2026-07-05T00:48:42.407794Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:48:42.407794Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.04283","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":"2026-07-05T00:48:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tINO8pzApcV/M3rC1iqoY52O2HRFwa80wd79dESIWBSEJFpYyFm16YOivGzGJQsiWlrENdLXigCz82kn4lrNCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:29:11.303564Z"},"content_sha256":"fd6f183452cd2144c484e47de1856e510183e87792058e1fd31d4f2055e26368","schema_version":"1.0","event_id":"sha256:fd6f183452cd2144c484e47de1856e510183e87792058e1fd31d4f2055e26368"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:BV4ALNDKVOHMHAKLUG4OMAOD2T","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Brownian motion of supermassive black holes in galaxy cores","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Carlo Nipoti, Luca Ciotti, Pierfrancesco Di Cintio","submitted_at":"2019-08-12T17:54:27Z","abstract_excerpt":"We investigate the dynamics of supermassive black holes (SMBHs) in galactic cores by means of a semi-analytic model based on the Langevin equation, including dynamical friction and stochastic noise accounting for the gravitational interactions with stars. The model is validated against direct $N$-body simulations of intermediate-mass black holes in stellar clusters where a realistic number of particles is accessible. For the galactic case, we find that the SMBH experiences a Brownian-like motion with a typical displacement from the geometric center of the Galaxy of a few parsecs, for system pa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.04283","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/1908.04283/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":"2026-07-05T00:48:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ahDqtfeqx6vzxnsZkZ+i8qqCl0Q5D4ok/ODRC+Bs+Y40Rdin/FRCDMIK2tNnnrq9bZ9iAsEYKpHAvuVAXHrgCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T10:29:11.304100Z"},"content_sha256":"4fc90b45ffb799bef2d57b9070393e0d44d053d4b8a4c7af2526417c638f6fbd","schema_version":"1.0","event_id":"sha256:4fc90b45ffb799bef2d57b9070393e0d44d053d4b8a4c7af2526417c638f6fbd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T/bundle.json","state_url":"https://pith.science/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T/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":"2026-08-01T10:29:11Z","links":{"resolver":"https://pith.science/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T","bundle":"https://pith.science/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T/bundle.json","state":"https://pith.science/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BV4ALNDKVOHMHAKLUG4OMAOD2T/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:BV4ALNDKVOHMHAKLUG4OMAOD2T","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":"5a3619a91ad10ec7d9a44f17268bc86dbef668464ba82e28582c6531170737c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T17:54:27Z","title_canon_sha256":"9ad0bbf4ab8f64edbb13b48d1afe7031c34cbc43809a574572e6c19166f0d974"},"schema_version":"1.0","source":{"id":"1908.04283","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.04283","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"arxiv_version","alias_value":"1908.04283v1","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.04283","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"pith_short_12","alias_value":"BV4ALNDKVOHM","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"pith_short_16","alias_value":"BV4ALNDKVOHMHAKL","created_at":"2026-07-05T00:48:42Z"},{"alias_kind":"pith_short_8","alias_value":"BV4ALNDK","created_at":"2026-07-05T00:48:42Z"}],"graph_snapshots":[{"event_id":"sha256:4fc90b45ffb799bef2d57b9070393e0d44d053d4b8a4c7af2526417c638f6fbd","target":"graph","created_at":"2026-07-05T00:48:42Z","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/1908.04283/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate the dynamics of supermassive black holes (SMBHs) in galactic cores by means of a semi-analytic model based on the Langevin equation, including dynamical friction and stochastic noise accounting for the gravitational interactions with stars. The model is validated against direct $N$-body simulations of intermediate-mass black holes in stellar clusters where a realistic number of particles is accessible. For the galactic case, we find that the SMBH experiences a Brownian-like motion with a typical displacement from the geometric center of the Galaxy of a few parsecs, for system pa","authors_text":"Carlo Nipoti, Luca Ciotti, Pierfrancesco Di Cintio","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T17:54:27Z","title":"Brownian motion of supermassive black holes in galaxy cores"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.04283","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:fd6f183452cd2144c484e47de1856e510183e87792058e1fd31d4f2055e26368","target":"record","created_at":"2026-07-05T00:48:42Z","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":"5a3619a91ad10ec7d9a44f17268bc86dbef668464ba82e28582c6531170737c6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T17:54:27Z","title_canon_sha256":"9ad0bbf4ab8f64edbb13b48d1afe7031c34cbc43809a574572e6c19166f0d974"},"schema_version":"1.0","source":{"id":"1908.04283","kind":"arxiv","version":1}},"canonical_sha256":"0d7805b46aab8ec3814ba1b8e601c3d4d7f7cdcdc2a84be3fe4d67cbc087537b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0d7805b46aab8ec3814ba1b8e601c3d4d7f7cdcdc2a84be3fe4d67cbc087537b","first_computed_at":"2026-07-05T00:48:42.407794Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:48:42.407794Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3dDoPoRYHJiZlJiAfkptPOOWd/4BcD9Tbye1QzPJKWp7owB7AHRRJ0GWUPFOfel7QvYEkGD/s3CP+CLqFEjiAw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:48:42.408212Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.04283","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd6f183452cd2144c484e47de1856e510183e87792058e1fd31d4f2055e26368","sha256:4fc90b45ffb799bef2d57b9070393e0d44d053d4b8a4c7af2526417c638f6fbd"],"state_sha256":"1d1597036fd8570170769919756cd4864611f08f2aaed1b164e50f87657b037e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YQMs2+sSzPESuz/q6czD8fO94wDIuWoQi8FACz/G3MeoyW2P7ikTlTLHO4ohfg+Zj714oSPEm8RvoeQsPnrwDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T10:29:11.310409Z","bundle_sha256":"9a064345a79c2476c6728f60e16855b03fe3761f7ffdddd8f9ebbc54e1b1a7b4"}}