{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:QNR4B42ZYSJTQ6FUNKD6XOFEZB","short_pith_number":"pith:QNR4B42Z","canonical_record":{"source":{"id":"2011.09570","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-11-18T22:39:29Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"7f4772fb15a922acec47026f55d754bd0221f3fae3c57af6fdb4531ace9e15b4","abstract_canon_sha256":"c2b74444410558f790e838f98461cce56b87f293fdd0d3b5121eaa56a568e797"},"schema_version":"1.0"},"canonical_sha256":"8363c0f359c4933878b46a87ebb8a4c87dd2b58e5d70cf1502d9396da7f4c9f7","source":{"kind":"arxiv","id":"2011.09570","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.09570","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"arxiv_version","alias_value":"2011.09570v4","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.09570","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"pith_short_12","alias_value":"QNR4B42ZYSJT","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"QNR4B42ZYSJTQ6FU","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"QNR4B42Z","created_at":"2026-07-05T03:29:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:QNR4B42ZYSJTQ6FUNKD6XOFEZB","target":"record","payload":{"canonical_record":{"source":{"id":"2011.09570","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-11-18T22:39:29Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"7f4772fb15a922acec47026f55d754bd0221f3fae3c57af6fdb4531ace9e15b4","abstract_canon_sha256":"c2b74444410558f790e838f98461cce56b87f293fdd0d3b5121eaa56a568e797"},"schema_version":"1.0"},"canonical_sha256":"8363c0f359c4933878b46a87ebb8a4c87dd2b58e5d70cf1502d9396da7f4c9f7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:29:14.587589Z","signature_b64":"yWLFAuZ+KJQp3r2wiQPHj2lGjJuEhnaYAS+ijdGOVfL9tBlAA9EmbmSBeTD0tB3vup0EbhWOcxa1rzLNI8e3Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8363c0f359c4933878b46a87ebb8a4c87dd2b58e5d70cf1502d9396da7f4c9f7","last_reissued_at":"2026-07-05T03:29:14.587190Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:29:14.587190Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.09570","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:29:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nkiOeRkhidhO7ademanGcrmWkK3f/YUCNEGNSAyE1AdkSgFI7R4J0ZBzNdWEYb1sCHW5QfLKFXPkZRO94/UPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T15:12:07.138053Z"},"content_sha256":"d8be322178c1249dc5adabf0fe783f191089ce0a5c106d3233e7b19328916798","schema_version":"1.0","event_id":"sha256:d8be322178c1249dc5adabf0fe783f191089ce0a5c106d3233e7b19328916798"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:QNR4B42ZYSJTQ6FUNKD6XOFEZB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"State of the field: Binary black hole natal kicks and prospects for isolated field formation after GWTC-2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"M. Renzo, T. A. Callister, W. M. Farr","submitted_at":"2020-11-18T22:39:29Z","abstract_excerpt":"Advanced LIGO and Advanced Virgo's newly-released GWTC-2 catalog of gravitational-wave detections offers unprecedented information about the spin magnitudes and orientations of merging binary black holes (BBHs). Notably, analysis of the BBH population suggests the presence of binaries whose component spins are significantly misaligned with respect to their orbital angular momenta. Significantly misaligned spins are typically predicted to be at odds with isolated field formation via standard common envelope (CE) evolution, and hence a \"smoking gun\" signature of dynamical binary formation inside"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.09570","kind":"arxiv","version":4},"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/2011.09570/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":"2026-07-05T03:29:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0HDlVSvN6H3HwmJPhaLIaxiOaaABT3knzY9H2MacXpUQOZOTrJkLLDEZd86H+OPOqUYTiNtxVOHzfhlbjLe/BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T15:12:07.138860Z"},"content_sha256":"418fb27f477ba3b2e5cb361ff762c2148a712e238e6fe49c73a9b0fd73138302","schema_version":"1.0","event_id":"sha256:418fb27f477ba3b2e5cb361ff762c2148a712e238e6fe49c73a9b0fd73138302"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB/bundle.json","state_url":"https://pith.science/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB/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":"2026-08-04T15:12:07Z","links":{"resolver":"https://pith.science/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB","bundle":"https://pith.science/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB/bundle.json","state":"https://pith.science/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QNR4B42ZYSJTQ6FUNKD6XOFEZB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QNR4B42ZYSJTQ6FUNKD6XOFEZB","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":"c2b74444410558f790e838f98461cce56b87f293fdd0d3b5121eaa56a568e797","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-11-18T22:39:29Z","title_canon_sha256":"7f4772fb15a922acec47026f55d754bd0221f3fae3c57af6fdb4531ace9e15b4"},"schema_version":"1.0","source":{"id":"2011.09570","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.09570","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"arxiv_version","alias_value":"2011.09570v4","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.09570","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"pith_short_12","alias_value":"QNR4B42ZYSJT","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"pith_short_16","alias_value":"QNR4B42ZYSJTQ6FU","created_at":"2026-07-05T03:29:14Z"},{"alias_kind":"pith_short_8","alias_value":"QNR4B42Z","created_at":"2026-07-05T03:29:14Z"}],"graph_snapshots":[{"event_id":"sha256:418fb27f477ba3b2e5cb361ff762c2148a712e238e6fe49c73a9b0fd73138302","target":"graph","created_at":"2026-07-05T03:29:14Z","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/2011.09570/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Advanced LIGO and Advanced Virgo's newly-released GWTC-2 catalog of gravitational-wave detections offers unprecedented information about the spin magnitudes and orientations of merging binary black holes (BBHs). Notably, analysis of the BBH population suggests the presence of binaries whose component spins are significantly misaligned with respect to their orbital angular momenta. Significantly misaligned spins are typically predicted to be at odds with isolated field formation via standard common envelope (CE) evolution, and hence a \"smoking gun\" signature of dynamical binary formation inside","authors_text":"M. Renzo, T. A. Callister, W. M. Farr","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-11-18T22:39:29Z","title":"State of the field: Binary black hole natal kicks and prospects for isolated field formation after GWTC-2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.09570","kind":"arxiv","version":4},"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:d8be322178c1249dc5adabf0fe783f191089ce0a5c106d3233e7b19328916798","target":"record","created_at":"2026-07-05T03:29:14Z","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":"c2b74444410558f790e838f98461cce56b87f293fdd0d3b5121eaa56a568e797","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-11-18T22:39:29Z","title_canon_sha256":"7f4772fb15a922acec47026f55d754bd0221f3fae3c57af6fdb4531ace9e15b4"},"schema_version":"1.0","source":{"id":"2011.09570","kind":"arxiv","version":4}},"canonical_sha256":"8363c0f359c4933878b46a87ebb8a4c87dd2b58e5d70cf1502d9396da7f4c9f7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8363c0f359c4933878b46a87ebb8a4c87dd2b58e5d70cf1502d9396da7f4c9f7","first_computed_at":"2026-07-05T03:29:14.587190Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:29:14.587190Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yWLFAuZ+KJQp3r2wiQPHj2lGjJuEhnaYAS+ijdGOVfL9tBlAA9EmbmSBeTD0tB3vup0EbhWOcxa1rzLNI8e3Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T03:29:14.587589Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.09570","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8be322178c1249dc5adabf0fe783f191089ce0a5c106d3233e7b19328916798","sha256:418fb27f477ba3b2e5cb361ff762c2148a712e238e6fe49c73a9b0fd73138302"],"state_sha256":"bcf72aecd7ad91381c82a5a58ad02ccdc2d1103703f8632548f2f5ab6cc4685f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T2BXkG9yHaSB4yQ9TLLzkScJl+inVpa3a6bhYuh1z4hKV+WWyiQXArBzzPRtOA74DIyToV07+Hc2WXo1n1NDAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T15:12:07.146111Z","bundle_sha256":"1fbf54106e9b5871d3e2fde7b702eb4ec186df6bdfa1e9edb3a590805cac31a9"}}