{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:PZWXXF2DQPCEHRBEKI7EVB7774","short_pith_number":"pith:PZWXXF2D","canonical_record":{"source":{"id":"1704.08370","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-26T22:43:17Z","cross_cats_sorted":[],"title_canon_sha256":"20f8bda08beeb149859b597f630da96125cb88854f4e25bdaa3708747d6b32c0","abstract_canon_sha256":"9e94285c84546cd1a7a172b100cb0c7b748a15c953cc8f7f132aa3b3d13291e7"},"schema_version":"1.0"},"canonical_sha256":"7e6d7b974383c443c424523e4a87ffff3e910e420c213b4195bbef7b38d42c82","source":{"kind":"arxiv","id":"1704.08370","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08370","created_at":"2026-05-18T00:36:38Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08370v2","created_at":"2026-05-18T00:36:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08370","created_at":"2026-05-18T00:36:38Z"},{"alias_kind":"pith_short_12","alias_value":"PZWXXF2DQPCE","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PZWXXF2DQPCEHRBE","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PZWXXF2D","created_at":"2026-05-18T12:31:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:PZWXXF2DQPCEHRBEKI7EVB7774","target":"record","payload":{"canonical_record":{"source":{"id":"1704.08370","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-26T22:43:17Z","cross_cats_sorted":[],"title_canon_sha256":"20f8bda08beeb149859b597f630da96125cb88854f4e25bdaa3708747d6b32c0","abstract_canon_sha256":"9e94285c84546cd1a7a172b100cb0c7b748a15c953cc8f7f132aa3b3d13291e7"},"schema_version":"1.0"},"canonical_sha256":"7e6d7b974383c443c424523e4a87ffff3e910e420c213b4195bbef7b38d42c82","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:36:38.587584Z","signature_b64":"kFNZuF0Im0w6O3FppAcLKxMn5Vxqf9rsLXvLkTT2BfSoV/Lx10rI6GaYhLI+SdwWsFyLdLtJ6fQ3gQF45v0yAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e6d7b974383c443c424523e4a87ffff3e910e420c213b4195bbef7b38d42c82","last_reissued_at":"2026-05-18T00:36:38.586978Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:36:38.586978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1704.08370","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":"2026-05-18T00:36:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q/oYA6g5ynpIjpxvKGrIBwOQ+yNImrlAPwz6q8IIKejBr0mi9rhDiKGIY1SgYepx7FTFJLOyamgrVDdI9157AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T21:08:19.807152Z"},"content_sha256":"37e0ba0c495a5e7ce197df84798b102301323755e98b8dd45da8f9770e64ecd3","schema_version":"1.0","event_id":"sha256:37e0ba0c495a5e7ce197df84798b102301323755e98b8dd45da8f9770e64ecd3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:PZWXXF2DQPCEHRBEKI7EVB7774","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Determining the population properties of spinning black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Colm Talbot, Eric Thrane","submitted_at":"2017-04-26T22:43:17Z","abstract_excerpt":"There are at least two formation scenarios consistent with the first gravitational-wave observations of binary black hole mergers. In field models, black hole binaries are formed from stellar binaries that may undergo common envelope evolution. In dynamic models, black hole binaries are formed through capture events in globular clusters. Both classes of models are subject to significant theoretical uncertainties. Nonetheless, the conventional wisdom holds that the distribution of spin orientations of dynamically merging black holes is nearly isotropic while field-model black holes prefer to sp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08370","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":"2026-05-18T00:36:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ntwhYk232s73VYB2o8WuMR9BvNteQSpPrbKTH5XcyWzlzG7cbd6AqMAm01jLvq7OcA/VHvWfKkEfvP6Z3zZYAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T21:08:19.807526Z"},"content_sha256":"128a3723e9b6fa5dc613db6f6f079f74ca91ce0ad21a2dba84da37f2c31fcd09","schema_version":"1.0","event_id":"sha256:128a3723e9b6fa5dc613db6f6f079f74ca91ce0ad21a2dba84da37f2c31fcd09"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PZWXXF2DQPCEHRBEKI7EVB7774/bundle.json","state_url":"https://pith.science/pith/PZWXXF2DQPCEHRBEKI7EVB7774/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PZWXXF2DQPCEHRBEKI7EVB7774/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":"2026-05-22T21:08:19Z","links":{"resolver":"https://pith.science/pith/PZWXXF2DQPCEHRBEKI7EVB7774","bundle":"https://pith.science/pith/PZWXXF2DQPCEHRBEKI7EVB7774/bundle.json","state":"https://pith.science/pith/PZWXXF2DQPCEHRBEKI7EVB7774/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PZWXXF2DQPCEHRBEKI7EVB7774/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:PZWXXF2DQPCEHRBEKI7EVB7774","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":"9e94285c84546cd1a7a172b100cb0c7b748a15c953cc8f7f132aa3b3d13291e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-26T22:43:17Z","title_canon_sha256":"20f8bda08beeb149859b597f630da96125cb88854f4e25bdaa3708747d6b32c0"},"schema_version":"1.0","source":{"id":"1704.08370","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.08370","created_at":"2026-05-18T00:36:38Z"},{"alias_kind":"arxiv_version","alias_value":"1704.08370v2","created_at":"2026-05-18T00:36:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.08370","created_at":"2026-05-18T00:36:38Z"},{"alias_kind":"pith_short_12","alias_value":"PZWXXF2DQPCE","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_16","alias_value":"PZWXXF2DQPCEHRBE","created_at":"2026-05-18T12:31:37Z"},{"alias_kind":"pith_short_8","alias_value":"PZWXXF2D","created_at":"2026-05-18T12:31:37Z"}],"graph_snapshots":[{"event_id":"sha256:128a3723e9b6fa5dc613db6f6f079f74ca91ce0ad21a2dba84da37f2c31fcd09","target":"graph","created_at":"2026-05-18T00:36:38Z","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":"There are at least two formation scenarios consistent with the first gravitational-wave observations of binary black hole mergers. In field models, black hole binaries are formed from stellar binaries that may undergo common envelope evolution. In dynamic models, black hole binaries are formed through capture events in globular clusters. Both classes of models are subject to significant theoretical uncertainties. Nonetheless, the conventional wisdom holds that the distribution of spin orientations of dynamically merging black holes is nearly isotropic while field-model black holes prefer to sp","authors_text":"Colm Talbot, Eric Thrane","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-26T22:43:17Z","title":"Determining the population properties of spinning black holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.08370","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":"sha256:37e0ba0c495a5e7ce197df84798b102301323755e98b8dd45da8f9770e64ecd3","target":"record","created_at":"2026-05-18T00:36:38Z","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":"9e94285c84546cd1a7a172b100cb0c7b748a15c953cc8f7f132aa3b3d13291e7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-04-26T22:43:17Z","title_canon_sha256":"20f8bda08beeb149859b597f630da96125cb88854f4e25bdaa3708747d6b32c0"},"schema_version":"1.0","source":{"id":"1704.08370","kind":"arxiv","version":2}},"canonical_sha256":"7e6d7b974383c443c424523e4a87ffff3e910e420c213b4195bbef7b38d42c82","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e6d7b974383c443c424523e4a87ffff3e910e420c213b4195bbef7b38d42c82","first_computed_at":"2026-05-18T00:36:38.586978Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:38.586978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kFNZuF0Im0w6O3FppAcLKxMn5Vxqf9rsLXvLkTT2BfSoV/Lx10rI6GaYhLI+SdwWsFyLdLtJ6fQ3gQF45v0yAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:38.587584Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.08370","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37e0ba0c495a5e7ce197df84798b102301323755e98b8dd45da8f9770e64ecd3","sha256:128a3723e9b6fa5dc613db6f6f079f74ca91ce0ad21a2dba84da37f2c31fcd09"],"state_sha256":"cfc2d1457e788abfad8f02ee85af1414e0d482ebca05ae78ce567312e32f9e8f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3dEemL7JKUz8Dk4jAI7VqHnNXg2fBTMnqM19vV+1WjRo/W9XGnEXuBxeBGMEDLkq+feye2lSkTkcX+to+GypDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T21:08:19.810049Z","bundle_sha256":"85e5353590e288e96f50992ba3c1ccd4b34fd3637fa1f7ece572574459bd3659"}}