{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:HFF7B7KNE2MKVKFKRTF6COWCMR","short_pith_number":"pith:HFF7B7KN","canonical_record":{"source":{"id":"1309.6734","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-26T06:58:42Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"d1c2b5569f2fe9d0db4a02a539c600b6aaa087458080e8c7ac5d9c31d42824c3","abstract_canon_sha256":"88960085ea1aa5ee3971d7663abddf3f02ffc5f4ece926a80b875d75f75c8c9d"},"schema_version":"1.0"},"canonical_sha256":"394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad","source":{"kind":"arxiv","id":"1309.6734","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.6734","created_at":"2026-05-18T01:47:26Z"},{"alias_kind":"arxiv_version","alias_value":"1309.6734v2","created_at":"2026-05-18T01:47:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.6734","created_at":"2026-05-18T01:47:26Z"},{"alias_kind":"pith_short_12","alias_value":"HFF7B7KNE2MK","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HFF7B7KNE2MKVKFK","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HFF7B7KN","created_at":"2026-05-18T12:27:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:HFF7B7KNE2MKVKFKRTF6COWCMR","target":"record","payload":{"canonical_record":{"source":{"id":"1309.6734","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-26T06:58:42Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"d1c2b5569f2fe9d0db4a02a539c600b6aaa087458080e8c7ac5d9c31d42824c3","abstract_canon_sha256":"88960085ea1aa5ee3971d7663abddf3f02ffc5f4ece926a80b875d75f75c8c9d"},"schema_version":"1.0"},"canonical_sha256":"394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:47:26.419911Z","signature_b64":"wzh2dkSf65bV1rQxnHRJTqRcWAvbGQhtfcR3dPtfQ1djPkHEIuBokVKiSjfvfGmcKiG12ThAe3TTe2nJrMc9DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad","last_reissued_at":"2026-05-18T01:47:26.419305Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:47:26.419305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1309.6734","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":"2026-05-18T01:47:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WK8wBe5debuLk+konMmBkZIWlpsDh6321TpaEuPQdw7x0ZNcCDLKvFWmvRPjt3VlrkWKoLF2r5UL4l/qj6gpDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:35:54.729248Z"},"content_sha256":"507f174cdc6604da641a5178cb300821a2251229ae1f914bb5719d8976818a25","schema_version":"1.0","event_id":"sha256:507f174cdc6604da641a5178cb300821a2251229ae1f914bb5719d8976818a25"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:HFF7B7KNE2MKVKFKRTF6COWCMR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Abundance Profiling of Extremely Metal-Poor Stars and Supernova Properties in the Early Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Ken'ichi Nomoto, Nobuyuki Iwamoto, Nozomu Tominaga","submitted_at":"2013-09-26T06:58:42Z","abstract_excerpt":"After the Big Bang nucleosynthesis, the first heavy element enrichment in the Universe was made by a supernova (SN) explosion of a population (Pop) III star (Pop III SN). The abundance ratios of elements produced from Pop III SNe are recorded in abundance patterns of extremely metal-poor (EMP) stars. The observations of the increasing number of EMP stars have made it possible to statistically constrain the explosion properties of Pop III SNe. We present Pop III SN models whose nucleosynthesis yields well-reproduce individually the abundance patterns of 48 such metal-poor stars as [Fe/H] $\\math"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.6734","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":"2026-05-18T01:47:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"97Vu+IjPOaKZz2TDGNLRgJ64WP9H65g90fAnrbfY8DXYxpy1ChDdSQlSqkhNeNOr/eJl8h/fK0pjeKwCVqcyCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:35:54.729972Z"},"content_sha256":"1c87167b0c663f8ca9b244f7ec7bdea2d680c8942b4e1f8e364583f7eb0f6df9","schema_version":"1.0","event_id":"sha256:1c87167b0c663f8ca9b244f7ec7bdea2d680c8942b4e1f8e364583f7eb0f6df9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HFF7B7KNE2MKVKFKRTF6COWCMR/bundle.json","state_url":"https://pith.science/pith/HFF7B7KNE2MKVKFKRTF6COWCMR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HFF7B7KNE2MKVKFKRTF6COWCMR/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":"2026-05-25T19:35:54Z","links":{"resolver":"https://pith.science/pith/HFF7B7KNE2MKVKFKRTF6COWCMR","bundle":"https://pith.science/pith/HFF7B7KNE2MKVKFKRTF6COWCMR/bundle.json","state":"https://pith.science/pith/HFF7B7KNE2MKVKFKRTF6COWCMR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HFF7B7KNE2MKVKFKRTF6COWCMR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HFF7B7KNE2MKVKFKRTF6COWCMR","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":"88960085ea1aa5ee3971d7663abddf3f02ffc5f4ece926a80b875d75f75c8c9d","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-26T06:58:42Z","title_canon_sha256":"d1c2b5569f2fe9d0db4a02a539c600b6aaa087458080e8c7ac5d9c31d42824c3"},"schema_version":"1.0","source":{"id":"1309.6734","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1309.6734","created_at":"2026-05-18T01:47:26Z"},{"alias_kind":"arxiv_version","alias_value":"1309.6734v2","created_at":"2026-05-18T01:47:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1309.6734","created_at":"2026-05-18T01:47:26Z"},{"alias_kind":"pith_short_12","alias_value":"HFF7B7KNE2MK","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HFF7B7KNE2MKVKFK","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HFF7B7KN","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:1c87167b0c663f8ca9b244f7ec7bdea2d680c8942b4e1f8e364583f7eb0f6df9","target":"graph","created_at":"2026-05-18T01:47:26Z","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":"After the Big Bang nucleosynthesis, the first heavy element enrichment in the Universe was made by a supernova (SN) explosion of a population (Pop) III star (Pop III SN). The abundance ratios of elements produced from Pop III SNe are recorded in abundance patterns of extremely metal-poor (EMP) stars. The observations of the increasing number of EMP stars have made it possible to statistically constrain the explosion properties of Pop III SNe. We present Pop III SN models whose nucleosynthesis yields well-reproduce individually the abundance patterns of 48 such metal-poor stars as [Fe/H] $\\math","authors_text":"Ken'ichi Nomoto, Nobuyuki Iwamoto, Nozomu Tominaga","cross_cats":["astro-ph.GA","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-26T06:58:42Z","title":"Abundance Profiling of Extremely Metal-Poor Stars and Supernova Properties in the Early Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.6734","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":"sha256:507f174cdc6604da641a5178cb300821a2251229ae1f914bb5719d8976818a25","target":"record","created_at":"2026-05-18T01:47:26Z","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":"88960085ea1aa5ee3971d7663abddf3f02ffc5f4ece926a80b875d75f75c8c9d","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-09-26T06:58:42Z","title_canon_sha256":"d1c2b5569f2fe9d0db4a02a539c600b6aaa087458080e8c7ac5d9c31d42824c3"},"schema_version":"1.0","source":{"id":"1309.6734","kind":"arxiv","version":2}},"canonical_sha256":"394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"394bf0fd4d2698aaa8aa8ccbe13ac2644967842b973e97430ab0bfef82b511ad","first_computed_at":"2026-05-18T01:47:26.419305Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:26.419305Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wzh2dkSf65bV1rQxnHRJTqRcWAvbGQhtfcR3dPtfQ1djPkHEIuBokVKiSjfvfGmcKiG12ThAe3TTe2nJrMc9DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:26.419911Z","signed_message":"canonical_sha256_bytes"},"source_id":"1309.6734","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:507f174cdc6604da641a5178cb300821a2251229ae1f914bb5719d8976818a25","sha256:1c87167b0c663f8ca9b244f7ec7bdea2d680c8942b4e1f8e364583f7eb0f6df9"],"state_sha256":"68b584650133e4158064cd7a1c98484683b46424e118db8836d130b79c59ed26"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+YxzXtZmd/x3Uu7on5RHzjcpcF7yV/1u/Zx+d8Cmbsw2Dqs4gAHcuIT7/tHFFkVVwSyMcsoBcM/+NiCdHK2WCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:35:54.734797Z","bundle_sha256":"bd5c942352bae161d10d341f0b79c3f297c5e993cad9f14940273a92e82e1781"}}