{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:7EIVXETPQ2L27SUDNA3EMV5NDE","short_pith_number":"pith:7EIVXETP","canonical_record":{"source":{"id":"2411.15112","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-11-22T18:25:35Z","cross_cats_sorted":["astro-ph.SR","gr-qc"],"title_canon_sha256":"adf94a7bc2cd85a9bd55c6d9e2ac49bb064d716468f430096c427c3e331071a1","abstract_canon_sha256":"bd87e3294c3cceefe0a76ba76d34284c1bd318780d6a2c23c2a07d3f76dd89ce"},"schema_version":"1.0"},"canonical_sha256":"f9115b926f8697afca8368364657ad193b8f4617d7e90aa267f2541aec67c29b","source":{"kind":"arxiv","id":"2411.15112","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.15112","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"arxiv_version","alias_value":"2411.15112v3","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.15112","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"pith_short_12","alias_value":"7EIVXETPQ2L2","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"pith_short_16","alias_value":"7EIVXETPQ2L27SUD","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"pith_short_8","alias_value":"7EIVXETP","created_at":"2026-06-01T02:03:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:7EIVXETPQ2L27SUDNA3EMV5NDE","target":"record","payload":{"canonical_record":{"source":{"id":"2411.15112","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-11-22T18:25:35Z","cross_cats_sorted":["astro-ph.SR","gr-qc"],"title_canon_sha256":"adf94a7bc2cd85a9bd55c6d9e2ac49bb064d716468f430096c427c3e331071a1","abstract_canon_sha256":"bd87e3294c3cceefe0a76ba76d34284c1bd318780d6a2c23c2a07d3f76dd89ce"},"schema_version":"1.0"},"canonical_sha256":"f9115b926f8697afca8368364657ad193b8f4617d7e90aa267f2541aec67c29b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-01T02:03:18.751440Z","signature_b64":"9LZol3Wdy3tC1LZcCl/P9VVi/KBb/dY08t0jcfyUo8HT/07LLMiFuhBfTEFcf6Qvi3hDQ8QIeKO5lyfMNyq/CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f9115b926f8697afca8368364657ad193b8f4617d7e90aa267f2541aec67c29b","last_reissued_at":"2026-06-01T02:03:18.750403Z","signature_status":"signed_v1","first_computed_at":"2026-06-01T02:03:18.750403Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2411.15112","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":"2026-06-01T02:03:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UEayxFD3a4dOQtI7jCEPbR8ntM2D3Qb7JIyi4vdvfCyG/iSUDi7WzssqPyFztlmZODQLnKEStiMUdcpSr5xaBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T09:20:27.371137Z"},"content_sha256":"fc9e0a987d65c756664d15b629c6c681f2d3042bb1978603fe35482747c00998","schema_version":"1.0","event_id":"sha256:fc9e0a987d65c756664d15b629c6c681f2d3042bb1978603fe35482747c00998"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:7EIVXETPQ2L27SUDNA3EMV5NDE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the effective spin-mass ratio relation of binary black hole mergers that evolved in isolation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR","gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Aleksandra Olejak, Sambaran Banerjee","submitted_at":"2024-11-22T18:25:35Z","abstract_excerpt":"The ground-based measurement of gravitational waves (GW) from merging binary black holes (BBH) allows independent determination of spins of stellar-remnant black holes (BH). The observed population of BBH mergers exhibits two intriguing peculiarities related to BH spins, namely, a positively biased distribution of the effective spin parameter, $\\chi_{\\rm eff}$, and an apparent anti-correlation between merger mass ratio, $q$, and $\\chi_{\\rm eff}$. Here we investigate the potential mechanisms for such observed properties, in BBH mergers via isolated binary evolution. We synthesise BBH mergers wi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.15112","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/2411.15112/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":"2026-06-01T02:03:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OoZndCpkFUi5fXDxog7kCq/i0LyqGGjOXaFR9ikeztFcbBIU9llrs22YxOc4nlHE/CtsZrvgAFePa4zgguL8Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T09:20:27.371865Z"},"content_sha256":"f260594aadeadf13fa20b5bd75085175ddcfb4bde0f5482cb5f0739ca9b0a4b2","schema_version":"1.0","event_id":"sha256:f260594aadeadf13fa20b5bd75085175ddcfb4bde0f5482cb5f0739ca9b0a4b2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7EIVXETPQ2L27SUDNA3EMV5NDE/bundle.json","state_url":"https://pith.science/pith/7EIVXETPQ2L27SUDNA3EMV5NDE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7EIVXETPQ2L27SUDNA3EMV5NDE/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":"2026-06-10T09:20:27Z","links":{"resolver":"https://pith.science/pith/7EIVXETPQ2L27SUDNA3EMV5NDE","bundle":"https://pith.science/pith/7EIVXETPQ2L27SUDNA3EMV5NDE/bundle.json","state":"https://pith.science/pith/7EIVXETPQ2L27SUDNA3EMV5NDE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7EIVXETPQ2L27SUDNA3EMV5NDE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:7EIVXETPQ2L27SUDNA3EMV5NDE","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":"bd87e3294c3cceefe0a76ba76d34284c1bd318780d6a2c23c2a07d3f76dd89ce","cross_cats_sorted":["astro-ph.SR","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-11-22T18:25:35Z","title_canon_sha256":"adf94a7bc2cd85a9bd55c6d9e2ac49bb064d716468f430096c427c3e331071a1"},"schema_version":"1.0","source":{"id":"2411.15112","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2411.15112","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"arxiv_version","alias_value":"2411.15112v3","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2411.15112","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"pith_short_12","alias_value":"7EIVXETPQ2L2","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"pith_short_16","alias_value":"7EIVXETPQ2L27SUD","created_at":"2026-06-01T02:03:18Z"},{"alias_kind":"pith_short_8","alias_value":"7EIVXETP","created_at":"2026-06-01T02:03:18Z"}],"graph_snapshots":[{"event_id":"sha256:f260594aadeadf13fa20b5bd75085175ddcfb4bde0f5482cb5f0739ca9b0a4b2","target":"graph","created_at":"2026-06-01T02:03:18Z","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/2411.15112/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The ground-based measurement of gravitational waves (GW) from merging binary black holes (BBH) allows independent determination of spins of stellar-remnant black holes (BH). The observed population of BBH mergers exhibits two intriguing peculiarities related to BH spins, namely, a positively biased distribution of the effective spin parameter, $\\chi_{\\rm eff}$, and an apparent anti-correlation between merger mass ratio, $q$, and $\\chi_{\\rm eff}$. Here we investigate the potential mechanisms for such observed properties, in BBH mergers via isolated binary evolution. We synthesise BBH mergers wi","authors_text":"Aleksandra Olejak, Sambaran Banerjee","cross_cats":["astro-ph.SR","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-11-22T18:25:35Z","title":"On the effective spin-mass ratio relation of binary black hole mergers that evolved in isolation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2411.15112","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:fc9e0a987d65c756664d15b629c6c681f2d3042bb1978603fe35482747c00998","target":"record","created_at":"2026-06-01T02:03:18Z","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":"bd87e3294c3cceefe0a76ba76d34284c1bd318780d6a2c23c2a07d3f76dd89ce","cross_cats_sorted":["astro-ph.SR","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2024-11-22T18:25:35Z","title_canon_sha256":"adf94a7bc2cd85a9bd55c6d9e2ac49bb064d716468f430096c427c3e331071a1"},"schema_version":"1.0","source":{"id":"2411.15112","kind":"arxiv","version":3}},"canonical_sha256":"f9115b926f8697afca8368364657ad193b8f4617d7e90aa267f2541aec67c29b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f9115b926f8697afca8368364657ad193b8f4617d7e90aa267f2541aec67c29b","first_computed_at":"2026-06-01T02:03:18.750403Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-01T02:03:18.750403Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9LZol3Wdy3tC1LZcCl/P9VVi/KBb/dY08t0jcfyUo8HT/07LLMiFuhBfTEFcf6Qvi3hDQ8QIeKO5lyfMNyq/CQ==","signature_status":"signed_v1","signed_at":"2026-06-01T02:03:18.751440Z","signed_message":"canonical_sha256_bytes"},"source_id":"2411.15112","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fc9e0a987d65c756664d15b629c6c681f2d3042bb1978603fe35482747c00998","sha256:f260594aadeadf13fa20b5bd75085175ddcfb4bde0f5482cb5f0739ca9b0a4b2"],"state_sha256":"5f2764137c7c0f948f09a5ebfdb106b0c6f58763ad0c252e41d2b95dea25c09e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2UTJPi2GZQea6Uk+C6HWp7MCdEbQ+epMn8vGcoHcExC2LRz0bofO4MQTW5IKluC3yvoMTDSJETBt5d8ggjKbBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T09:20:27.375502Z","bundle_sha256":"09a13a1df58a30386e5bb96a9e7a128135cd49b16c87868cc9b52e0dd33f1469"}}