{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:TGIU6C5SLTMYDR654Z3BIBTYVQ","short_pith_number":"pith:TGIU6C5S","canonical_record":{"source":{"id":"2504.07197","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-04-09T18:25:49Z","cross_cats_sorted":["astro-ph.HE","gr-qc"],"title_canon_sha256":"15713fc9c32fd9f65c9fae66c52a3997ca7ceb2ea13259f3aac429cad5cfa0ca","abstract_canon_sha256":"64bf1221e7193f807ae6f76fd4f28a9d85b7fc6fc3b0b169b5ebb353ff532368"},"schema_version":"1.0"},"canonical_sha256":"99914f0bb25cd981c7dde676140678ac0bc924d751d828ef8632ca20bbf603a3","source":{"kind":"arxiv","id":"2504.07197","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.07197","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"arxiv_version","alias_value":"2504.07197v3","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.07197","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"pith_short_12","alias_value":"TGIU6C5SLTMY","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"pith_short_16","alias_value":"TGIU6C5SLTMYDR65","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"pith_short_8","alias_value":"TGIU6C5S","created_at":"2026-07-05T11:28:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:TGIU6C5SLTMYDR654Z3BIBTYVQ","target":"record","payload":{"canonical_record":{"source":{"id":"2504.07197","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-04-09T18:25:49Z","cross_cats_sorted":["astro-ph.HE","gr-qc"],"title_canon_sha256":"15713fc9c32fd9f65c9fae66c52a3997ca7ceb2ea13259f3aac429cad5cfa0ca","abstract_canon_sha256":"64bf1221e7193f807ae6f76fd4f28a9d85b7fc6fc3b0b169b5ebb353ff532368"},"schema_version":"1.0"},"canonical_sha256":"99914f0bb25cd981c7dde676140678ac0bc924d751d828ef8632ca20bbf603a3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:28:15.646176Z","signature_b64":"EWdEx+BuT9uzRxO7ZidGm7z8/jVoy1Ip/o1qp90AnegUo0z6eFMch6y17fReAzi/P8GJgQ6Tcv68bKW42FZABg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99914f0bb25cd981c7dde676140678ac0bc924d751d828ef8632ca20bbf603a3","last_reissued_at":"2026-07-05T11:28:15.645446Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:28:15.645446Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2504.07197","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:28:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u7csGxkEkkDhf5jE9dPySTLseYkmzFj0c3TqSg6QCfcXlW4oW/MSGaei9qE0z1uQEC+DPFIVvGs6upaQ91WSCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T23:09:37.132226Z"},"content_sha256":"925e8493b0b8f5cfef2d010994278ef548ca001f8202cf23ace3fd20ec83f8f9","schema_version":"1.0","event_id":"sha256:925e8493b0b8f5cfef2d010994278ef548ca001f8202cf23ace3fd20ec83f8f9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:TGIU6C5SLTMYDR654Z3BIBTYVQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rapid inference and comparison of gravitational-wave population models with neural variational posteriors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Matthew Mould, Noah E. Wolfe, Salvatore Vitale","submitted_at":"2025-04-09T18:25:49Z","abstract_excerpt":"The LIGO-Virgo-KAGRA catalog has been analyzed with an abundance of different population models due to theoretical uncertainty in the formation of gravitational-wave sources. To expedite model exploration, we introduce an efficient and accurate variational Bayesian approach that learns the population posterior with a normalizing flow and serves as a drop-in replacement for existing samplers. With hardware acceleration, inference takes just seconds for the current set of black-hole mergers and readily scales to larger catalogs. The trained posteriors provide an arbitrary number of independent s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.07197","kind":"arxiv","version":3},"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/2504.07197/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":"2026-07-05T11:28:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HHu1XvoWIF4YJLoRGuxpX0EVjFvDTDQpk+Fjms7WKyZ6xKJJx12SRqTMaM+aSXl18/wNc+N0Pszs9OIxAInfDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T23:09:37.132631Z"},"content_sha256":"82c7c29e130a6e89f6ea42d2d67744987d7ef7b5ddc280211b5b012c9858da57","schema_version":"1.0","event_id":"sha256:82c7c29e130a6e89f6ea42d2d67744987d7ef7b5ddc280211b5b012c9858da57"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ/bundle.json","state_url":"https://pith.science/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ/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":"2026-08-07T23:09:37Z","links":{"resolver":"https://pith.science/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ","bundle":"https://pith.science/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ/bundle.json","state":"https://pith.science/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TGIU6C5SLTMYDR654Z3BIBTYVQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:TGIU6C5SLTMYDR654Z3BIBTYVQ","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":"64bf1221e7193f807ae6f76fd4f28a9d85b7fc6fc3b0b169b5ebb353ff532368","cross_cats_sorted":["astro-ph.HE","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-04-09T18:25:49Z","title_canon_sha256":"15713fc9c32fd9f65c9fae66c52a3997ca7ceb2ea13259f3aac429cad5cfa0ca"},"schema_version":"1.0","source":{"id":"2504.07197","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2504.07197","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"arxiv_version","alias_value":"2504.07197v3","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2504.07197","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"pith_short_12","alias_value":"TGIU6C5SLTMY","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"pith_short_16","alias_value":"TGIU6C5SLTMYDR65","created_at":"2026-07-05T11:28:15Z"},{"alias_kind":"pith_short_8","alias_value":"TGIU6C5S","created_at":"2026-07-05T11:28:15Z"}],"graph_snapshots":[{"event_id":"sha256:82c7c29e130a6e89f6ea42d2d67744987d7ef7b5ddc280211b5b012c9858da57","target":"graph","created_at":"2026-07-05T11:28:15Z","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/2504.07197/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The LIGO-Virgo-KAGRA catalog has been analyzed with an abundance of different population models due to theoretical uncertainty in the formation of gravitational-wave sources. To expedite model exploration, we introduce an efficient and accurate variational Bayesian approach that learns the population posterior with a normalizing flow and serves as a drop-in replacement for existing samplers. With hardware acceleration, inference takes just seconds for the current set of black-hole mergers and readily scales to larger catalogs. The trained posteriors provide an arbitrary number of independent s","authors_text":"Matthew Mould, Noah E. Wolfe, Salvatore Vitale","cross_cats":["astro-ph.HE","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-04-09T18:25:49Z","title":"Rapid inference and comparison of gravitational-wave population models with neural variational posteriors"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.07197","kind":"arxiv","version":3},"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":"sha256:925e8493b0b8f5cfef2d010994278ef548ca001f8202cf23ace3fd20ec83f8f9","target":"record","created_at":"2026-07-05T11:28:15Z","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":"64bf1221e7193f807ae6f76fd4f28a9d85b7fc6fc3b0b169b5ebb353ff532368","cross_cats_sorted":["astro-ph.HE","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2025-04-09T18:25:49Z","title_canon_sha256":"15713fc9c32fd9f65c9fae66c52a3997ca7ceb2ea13259f3aac429cad5cfa0ca"},"schema_version":"1.0","source":{"id":"2504.07197","kind":"arxiv","version":3}},"canonical_sha256":"99914f0bb25cd981c7dde676140678ac0bc924d751d828ef8632ca20bbf603a3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99914f0bb25cd981c7dde676140678ac0bc924d751d828ef8632ca20bbf603a3","first_computed_at":"2026-07-05T11:28:15.645446Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:28:15.645446Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EWdEx+BuT9uzRxO7ZidGm7z8/jVoy1Ip/o1qp90AnegUo0z6eFMch6y17fReAzi/P8GJgQ6Tcv68bKW42FZABg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:28:15.646176Z","signed_message":"canonical_sha256_bytes"},"source_id":"2504.07197","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:925e8493b0b8f5cfef2d010994278ef548ca001f8202cf23ace3fd20ec83f8f9","sha256:82c7c29e130a6e89f6ea42d2d67744987d7ef7b5ddc280211b5b012c9858da57"],"state_sha256":"241bb9c84f8f29e41c400c3a30ecc0618c5542fafe317236d4216857083beb55"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tDbDNCEm8/aLqAm0kJ6cF2L/jA8z3kSB1/BBwUuvIAouHg4oZss7Dg84wuV1BIIJnIqhv0JM34uoiWDCbn2iDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T23:09:37.135520Z","bundle_sha256":"5b55c00b6ef0350c6e9cd69b09aed13f97bfc66da0af20731a72ab0b26937880"}}