{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:KXO4555GIEAYEJNAWKH7BR2UZF","short_pith_number":"pith:KXO4555G","canonical_record":{"source":{"id":"2005.04239","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-08T18:00:02Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"59270fbfe38ffbba3e8178efcaf5577a66fb30a4a5266b9157cce534e8fb078b","abstract_canon_sha256":"072a701c28e29424d4cff85a5e9c6162d2c478d9378a2dda918b0cf47f15a29a"},"schema_version":"1.0"},"canonical_sha256":"55ddcef7a641018225a0b28ff0c754c94111f004b28f6abd195de68eacfce27f","source":{"kind":"arxiv","id":"2005.04239","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.04239","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"arxiv_version","alias_value":"2005.04239v2","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.04239","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"pith_short_12","alias_value":"KXO4555GIEAY","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"pith_short_16","alias_value":"KXO4555GIEAYEJNA","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"pith_short_8","alias_value":"KXO4555G","created_at":"2026-07-05T01:10:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:KXO4555GIEAYEJNAWKH7BR2UZF","target":"record","payload":{"canonical_record":{"source":{"id":"2005.04239","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-08T18:00:02Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"59270fbfe38ffbba3e8178efcaf5577a66fb30a4a5266b9157cce534e8fb078b","abstract_canon_sha256":"072a701c28e29424d4cff85a5e9c6162d2c478d9378a2dda918b0cf47f15a29a"},"schema_version":"1.0"},"canonical_sha256":"55ddcef7a641018225a0b28ff0c754c94111f004b28f6abd195de68eacfce27f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:10:38.270421Z","signature_b64":"a02mbCky/i6gGY1vZLN/HGNXzMpjgAlJP4IbokHMWPlFlTeysceBqm0UDec7gKhiS0mf4jKSrOPqGPRcDsf1BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"55ddcef7a641018225a0b28ff0c754c94111f004b28f6abd195de68eacfce27f","last_reissued_at":"2026-07-05T01:10:38.269878Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:10:38.269878Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2005.04239","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":"2026-07-05T01:10:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H6SkArgtzbq9/C9XckO3+BVncpzK7zADXm5kNS72r18Abofkcu96nz8LWtphvz15BEYX9WHzarCorA5kHlc1CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T03:40:40.765659Z"},"content_sha256":"04183c8a57472b166b110dddb72bc881dc6d0d0af295511a0bea501c4a4e9d66","schema_version":"1.0","event_id":"sha256:04183c8a57472b166b110dddb72bc881dc6d0d0af295511a0bea501c4a4e9d66"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:KXO4555GIEAYEJNAWKH7BR2UZF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GW190412 as a Third-Generation Black Hole Merger from a Super Star Cluster","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Astrid Lamberts, Carl L. Rodriguez, Claire S. Ye, Frederic A. Rasio, Giacomo Fragione, Kyle Kremer, Michael Y. Grudi\\'c, Miguel A. S. Martinez, Newlin Weatherford, Sourav Chatterjee, Zachary Hafen","submitted_at":"2020-05-08T18:00:02Z","abstract_excerpt":"We explore the possibility that GW190412, a binary black hole merger with a non-equal-mass ratio and significantly spinning primary, was formed through repeated black hole mergers in a dense super star cluster. Using a combination of semi-analytic prescriptions for the remnant spin and recoil kick of black hole mergers, we show that the mass ratio and spin of GW190412 are consistent with a binary black hole whose primary component has undergone two successive mergers from a population of $\\sim 10M_{\\odot}$ black holes in a high-metallicity environment. We then explore the production of GW19041"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.04239","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2005.04239/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":"2026-07-05T01:10:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9b9OjtmydWqvj1shuXDDhyIbykdYTdJI7M//Aqe4oWH/Xh07wZnzJ9qe/yASeHGaeoA0qkTFvTElVKDZUcOoAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T03:40:40.766422Z"},"content_sha256":"bad42be039d6cc15fa4d0a31925713aae5056e3368116e2941630239da278d9f","schema_version":"1.0","event_id":"sha256:bad42be039d6cc15fa4d0a31925713aae5056e3368116e2941630239da278d9f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KXO4555GIEAYEJNAWKH7BR2UZF/bundle.json","state_url":"https://pith.science/pith/KXO4555GIEAYEJNAWKH7BR2UZF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KXO4555GIEAYEJNAWKH7BR2UZF/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":"2026-08-19T03:40:40Z","links":{"resolver":"https://pith.science/pith/KXO4555GIEAYEJNAWKH7BR2UZF","bundle":"https://pith.science/pith/KXO4555GIEAYEJNAWKH7BR2UZF/bundle.json","state":"https://pith.science/pith/KXO4555GIEAYEJNAWKH7BR2UZF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KXO4555GIEAYEJNAWKH7BR2UZF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:KXO4555GIEAYEJNAWKH7BR2UZF","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":"072a701c28e29424d4cff85a5e9c6162d2c478d9378a2dda918b0cf47f15a29a","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-08T18:00:02Z","title_canon_sha256":"59270fbfe38ffbba3e8178efcaf5577a66fb30a4a5266b9157cce534e8fb078b"},"schema_version":"1.0","source":{"id":"2005.04239","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.04239","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"arxiv_version","alias_value":"2005.04239v2","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.04239","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"pith_short_12","alias_value":"KXO4555GIEAY","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"pith_short_16","alias_value":"KXO4555GIEAYEJNA","created_at":"2026-07-05T01:10:38Z"},{"alias_kind":"pith_short_8","alias_value":"KXO4555G","created_at":"2026-07-05T01:10:38Z"}],"graph_snapshots":[{"event_id":"sha256:bad42be039d6cc15fa4d0a31925713aae5056e3368116e2941630239da278d9f","target":"graph","created_at":"2026-07-05T01:10:38Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2005.04239/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We explore the possibility that GW190412, a binary black hole merger with a non-equal-mass ratio and significantly spinning primary, was formed through repeated black hole mergers in a dense super star cluster. Using a combination of semi-analytic prescriptions for the remnant spin and recoil kick of black hole mergers, we show that the mass ratio and spin of GW190412 are consistent with a binary black hole whose primary component has undergone two successive mergers from a population of $\\sim 10M_{\\odot}$ black holes in a high-metallicity environment. We then explore the production of GW19041","authors_text":"Astrid Lamberts, Carl L. Rodriguez, Claire S. Ye, Frederic A. Rasio, Giacomo Fragione, Kyle Kremer, Michael Y. Grudi\\'c, Miguel A. S. Martinez, Newlin Weatherford, Sourav Chatterjee, Zachary Hafen","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-08T18:00:02Z","title":"GW190412 as a Third-Generation Black Hole Merger from a Super Star Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.04239","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":"sha256:04183c8a57472b166b110dddb72bc881dc6d0d0af295511a0bea501c4a4e9d66","target":"record","created_at":"2026-07-05T01:10:38Z","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":"072a701c28e29424d4cff85a5e9c6162d2c478d9378a2dda918b0cf47f15a29a","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-05-08T18:00:02Z","title_canon_sha256":"59270fbfe38ffbba3e8178efcaf5577a66fb30a4a5266b9157cce534e8fb078b"},"schema_version":"1.0","source":{"id":"2005.04239","kind":"arxiv","version":2}},"canonical_sha256":"55ddcef7a641018225a0b28ff0c754c94111f004b28f6abd195de68eacfce27f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"55ddcef7a641018225a0b28ff0c754c94111f004b28f6abd195de68eacfce27f","first_computed_at":"2026-07-05T01:10:38.269878Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:10:38.269878Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"a02mbCky/i6gGY1vZLN/HGNXzMpjgAlJP4IbokHMWPlFlTeysceBqm0UDec7gKhiS0mf4jKSrOPqGPRcDsf1BQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:10:38.270421Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.04239","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:04183c8a57472b166b110dddb72bc881dc6d0d0af295511a0bea501c4a4e9d66","sha256:bad42be039d6cc15fa4d0a31925713aae5056e3368116e2941630239da278d9f"],"state_sha256":"685a213883749ceeed2288ff92b0749bd1d52f4d8beaaf1dd0e6b70a514a52a3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2JMFnb+WD8ADyBaCOWO9ef8epukC7v0GZbGLA0PclrVaQsVrZNxKO/kZbeaa0Kgt/1QWkRmxhgk2WjgJEP7sCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T03:40:40.775031Z","bundle_sha256":"e5d6bf40c98153c938ac1cce4ca9ed106421c1aa78230fc53cf3d6bacca4b2fd"}}