{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:4NOBPQDKB6LDJZXTCA7WHZW55G","short_pith_number":"pith:4NOBPQDK","schema_version":"1.0","canonical_sha256":"e35c17c06a0f9634e6f3103f63e6dde998a5a3f99f871ef9af3fc27b9cb27462","source":{"kind":"arxiv","id":"1306.3670","version":1},"attestation_state":"computed","paper":{"title":"Silicon carbide grains of type C provide evidence for the production of the unstable isotope $^{32}$Si in supernovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"C. Fryer, E. Zinner, F. Herwig, F.-K. Thielemann, F.X. Timmes, M.G. Bertolli, M. Pignatari, P. Hoppe, R. Hirschi, R. Trappitsch, T. Rauscher","submitted_at":"2013-06-16T15:45:28Z","abstract_excerpt":"Carbon-rich grains are observed to condense in the ejecta of recent core-collapse supernovae, within a year after the explosion. Silicon carbide grains of type X are C-rich grains with isotpic signatures of explosive supernova nucleosynthesis have been found in primitive meteorites. Much rarer silicon carbide grains of type C are a special sub-group of SiC grains from supernovae. They show peculiar abundance signatures for Si and S, isotopically heavy Si and isotopically light S, which appear to to be in disagreement with model predictions. We propose that C grains are formed mostly from C-ric"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1306.3670","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-06-16T15:45:28Z","cross_cats_sorted":[],"title_canon_sha256":"60e1ab2f70559c4691d672ff22a2580b6769ed2a0a06ff27c9a68d507f1c70f2","abstract_canon_sha256":"72cfb14c07ba509013b754633c1d238067b2b898f7ab2d4979ba3c8acf4dc94d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:20:46.836662Z","signature_b64":"RBr47t1C3xh2x1jcjyg63CWWCyGFwgqVhWNzTw+MQoOv2pY/q3oVsl+K/swbEn3KUSLLiDAR1PdmjE5LTSHDDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e35c17c06a0f9634e6f3103f63e6dde998a5a3f99f871ef9af3fc27b9cb27462","last_reissued_at":"2026-05-18T03:20:46.835896Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:20:46.835896Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Silicon carbide grains of type C provide evidence for the production of the unstable isotope $^{32}$Si in supernovae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"C. Fryer, E. Zinner, F. Herwig, F.-K. Thielemann, F.X. Timmes, M.G. Bertolli, M. Pignatari, P. Hoppe, R. Hirschi, R. Trappitsch, T. Rauscher","submitted_at":"2013-06-16T15:45:28Z","abstract_excerpt":"Carbon-rich grains are observed to condense in the ejecta of recent core-collapse supernovae, within a year after the explosion. Silicon carbide grains of type X are C-rich grains with isotpic signatures of explosive supernova nucleosynthesis have been found in primitive meteorites. Much rarer silicon carbide grains of type C are a special sub-group of SiC grains from supernovae. They show peculiar abundance signatures for Si and S, isotopically heavy Si and isotopically light S, which appear to to be in disagreement with model predictions. We propose that C grains are formed mostly from C-ric"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.3670","kind":"arxiv","version":1},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1306.3670","created_at":"2026-05-18T03:20:46.836023+00:00"},{"alias_kind":"arxiv_version","alias_value":"1306.3670v1","created_at":"2026-05-18T03:20:46.836023+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.3670","created_at":"2026-05-18T03:20:46.836023+00:00"},{"alias_kind":"pith_short_12","alias_value":"4NOBPQDKB6LD","created_at":"2026-05-18T12:27:34.582898+00:00"},{"alias_kind":"pith_short_16","alias_value":"4NOBPQDKB6LDJZXT","created_at":"2026-05-18T12:27:34.582898+00:00"},{"alias_kind":"pith_short_8","alias_value":"4NOBPQDK","created_at":"2026-05-18T12:27:34.582898+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G","json":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G.json","graph_json":"https://pith.science/api/pith-number/4NOBPQDKB6LDJZXTCA7WHZW55G/graph.json","events_json":"https://pith.science/api/pith-number/4NOBPQDKB6LDJZXTCA7WHZW55G/events.json","paper":"https://pith.science/paper/4NOBPQDK"},"agent_actions":{"view_html":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G","download_json":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G.json","view_paper":"https://pith.science/paper/4NOBPQDK","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1306.3670&json=true","fetch_graph":"https://pith.science/api/pith-number/4NOBPQDKB6LDJZXTCA7WHZW55G/graph.json","fetch_events":"https://pith.science/api/pith-number/4NOBPQDKB6LDJZXTCA7WHZW55G/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G/action/storage_attestation","attest_author":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G/action/author_attestation","sign_citation":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G/action/citation_signature","submit_replication":"https://pith.science/pith/4NOBPQDKB6LDJZXTCA7WHZW55G/action/replication_record"}},"created_at":"2026-05-18T03:20:46.836023+00:00","updated_at":"2026-05-18T03:20:46.836023+00:00"}