{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:T5K2LRFRJY4KXIIIG4SSILPKLT","short_pith_number":"pith:T5K2LRFR","canonical_record":{"source":{"id":"1503.02199","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-07T18:31:13Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"e48263c81865a8264064b56d91c655365ba18a9d58d53608f2625b3a2b1a13ab","abstract_canon_sha256":"1bc0312b43ad3bb5a162892087dbbab9fdfec580d48eb65c1f489e16452f5f42"},"schema_version":"1.0"},"canonical_sha256":"9f55a5c4b14e38aba1083725242dea5cfcbc04a6b7e0da0b03ad8c519bd24b5f","source":{"kind":"arxiv","id":"1503.02199","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.02199","created_at":"2026-05-18T01:35:48Z"},{"alias_kind":"arxiv_version","alias_value":"1503.02199v2","created_at":"2026-05-18T01:35:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.02199","created_at":"2026-05-18T01:35:48Z"},{"alias_kind":"pith_short_12","alias_value":"T5K2LRFRJY4K","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T5K2LRFRJY4KXIII","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T5K2LRFR","created_at":"2026-05-18T12:29:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:T5K2LRFRJY4KXIIIG4SSILPKLT","target":"record","payload":{"canonical_record":{"source":{"id":"1503.02199","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-07T18:31:13Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"e48263c81865a8264064b56d91c655365ba18a9d58d53608f2625b3a2b1a13ab","abstract_canon_sha256":"1bc0312b43ad3bb5a162892087dbbab9fdfec580d48eb65c1f489e16452f5f42"},"schema_version":"1.0"},"canonical_sha256":"9f55a5c4b14e38aba1083725242dea5cfcbc04a6b7e0da0b03ad8c519bd24b5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:48.976348Z","signature_b64":"afeCvBxm9tYJfMvDiDa+kzgX4qmrdWD2WPn+4ZI0g6iLQ3Wc0ImSxxZ9qjGe7AkMdu9GVLwvRfCprcT8GVY/Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f55a5c4b14e38aba1083725242dea5cfcbc04a6b7e0da0b03ad8c519bd24b5f","last_reissued_at":"2026-05-18T01:35:48.975566Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:48.975566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.02199","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":"2026-05-18T01:35:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VRx15k8g7+Wi4PrlxrZWyHicOoO92VxoiPRLda5Fx/0UJBTuMMJ+2Jj8ggZO4PI5+Rbzp50OT4GV4RuBPek5AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:46:11.058739Z"},"content_sha256":"8d00a60ab109bae1195e81cc8f179034e5aa342a19f89293a688af7fd4b38d98","schema_version":"1.0","event_id":"sha256:8d00a60ab109bae1195e81cc8f179034e5aa342a19f89293a688af7fd4b38d98"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:T5K2LRFRJY4KXIIIG4SSILPKLT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Three Dimensional Evolution to Core Collapse of a Massive Star","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Emmanouil Chatzopoulos, F.X. Timmes, Sean M. Couch, W. David Arnett","submitted_at":"2015-03-07T18:31:13Z","abstract_excerpt":"We present the first three dimensional (3D) simulation of the final minutes of iron core growth in a massive star, up to and including the point of core gravitational instability and collapse. We self-consistently capture the development of strong convection driven by violent Si burning in the shell surrounding the iron core. This convective burning builds the iron core to its critical (Chandrasekhar) mass and collapse ensues, driven by electron capture and photodisintegration. The non-spherical structure and motion (turbulent fluctuations) generated by 3D convection is substantial at the poin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.02199","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":"2026-05-18T01:35:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GIbQFOX3Edz0+EhohUuGynFCKQGZ885FLz+psiosJiv9ePwYqTPmg9rLF7Vb02JdjUf8eleyunTQE4U+/p+IBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:46:11.059096Z"},"content_sha256":"ce3b9625ecbfbe86e59e275800b363cc3a9ed78a26d9d6c5b73406401d6cfa2d","schema_version":"1.0","event_id":"sha256:ce3b9625ecbfbe86e59e275800b363cc3a9ed78a26d9d6c5b73406401d6cfa2d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T5K2LRFRJY4KXIIIG4SSILPKLT/bundle.json","state_url":"https://pith.science/pith/T5K2LRFRJY4KXIIIG4SSILPKLT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T5K2LRFRJY4KXIIIG4SSILPKLT/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":"2026-06-03T17:46:11Z","links":{"resolver":"https://pith.science/pith/T5K2LRFRJY4KXIIIG4SSILPKLT","bundle":"https://pith.science/pith/T5K2LRFRJY4KXIIIG4SSILPKLT/bundle.json","state":"https://pith.science/pith/T5K2LRFRJY4KXIIIG4SSILPKLT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T5K2LRFRJY4KXIIIG4SSILPKLT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:T5K2LRFRJY4KXIIIG4SSILPKLT","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":"1bc0312b43ad3bb5a162892087dbbab9fdfec580d48eb65c1f489e16452f5f42","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-07T18:31:13Z","title_canon_sha256":"e48263c81865a8264064b56d91c655365ba18a9d58d53608f2625b3a2b1a13ab"},"schema_version":"1.0","source":{"id":"1503.02199","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.02199","created_at":"2026-05-18T01:35:48Z"},{"alias_kind":"arxiv_version","alias_value":"1503.02199v2","created_at":"2026-05-18T01:35:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.02199","created_at":"2026-05-18T01:35:48Z"},{"alias_kind":"pith_short_12","alias_value":"T5K2LRFRJY4K","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_16","alias_value":"T5K2LRFRJY4KXIII","created_at":"2026-05-18T12:29:42Z"},{"alias_kind":"pith_short_8","alias_value":"T5K2LRFR","created_at":"2026-05-18T12:29:42Z"}],"graph_snapshots":[{"event_id":"sha256:ce3b9625ecbfbe86e59e275800b363cc3a9ed78a26d9d6c5b73406401d6cfa2d","target":"graph","created_at":"2026-05-18T01:35:48Z","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":"We present the first three dimensional (3D) simulation of the final minutes of iron core growth in a massive star, up to and including the point of core gravitational instability and collapse. We self-consistently capture the development of strong convection driven by violent Si burning in the shell surrounding the iron core. This convective burning builds the iron core to its critical (Chandrasekhar) mass and collapse ensues, driven by electron capture and photodisintegration. The non-spherical structure and motion (turbulent fluctuations) generated by 3D convection is substantial at the poin","authors_text":"Emmanouil Chatzopoulos, F.X. Timmes, Sean M. Couch, W. David Arnett","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-07T18:31:13Z","title":"The Three Dimensional Evolution to Core Collapse of a Massive Star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.02199","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":"sha256:8d00a60ab109bae1195e81cc8f179034e5aa342a19f89293a688af7fd4b38d98","target":"record","created_at":"2026-05-18T01:35:48Z","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":"1bc0312b43ad3bb5a162892087dbbab9fdfec580d48eb65c1f489e16452f5f42","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-03-07T18:31:13Z","title_canon_sha256":"e48263c81865a8264064b56d91c655365ba18a9d58d53608f2625b3a2b1a13ab"},"schema_version":"1.0","source":{"id":"1503.02199","kind":"arxiv","version":2}},"canonical_sha256":"9f55a5c4b14e38aba1083725242dea5cfcbc04a6b7e0da0b03ad8c519bd24b5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9f55a5c4b14e38aba1083725242dea5cfcbc04a6b7e0da0b03ad8c519bd24b5f","first_computed_at":"2026-05-18T01:35:48.975566Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:48.975566Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"afeCvBxm9tYJfMvDiDa+kzgX4qmrdWD2WPn+4ZI0g6iLQ3Wc0ImSxxZ9qjGe7AkMdu9GVLwvRfCprcT8GVY/Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:48.976348Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.02199","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8d00a60ab109bae1195e81cc8f179034e5aa342a19f89293a688af7fd4b38d98","sha256:ce3b9625ecbfbe86e59e275800b363cc3a9ed78a26d9d6c5b73406401d6cfa2d"],"state_sha256":"4266a4a72a1ab8aca75a3f5b7cf133cc20224569070f424f8833b2ec8e68bad8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JmNpMKacChj7isbw+q26omfcR37ixZZPbgmO8x8B/F4r1n0DihoEeQKrJVks/BDUgTL8yP0fof7VJvgh3swhAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T17:46:11.061117Z","bundle_sha256":"378bf36c9359622d43a9f5370d90ed6653f4a6fbbd0fe9de3e9cb0900c73cd3a"}}