{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:XVM3ZP3GLU4DTWXKYT2N2Z54GW","short_pith_number":"pith:XVM3ZP3G","schema_version":"1.0","canonical_sha256":"bd59bcbf665d3839daeac4f4dd67bc35aff9cf54b13232438597d54eb4fd4945","source":{"kind":"arxiv","id":"1310.0485","version":1},"attestation_state":"computed","paper":{"title":"Evidence for Radiogenic Sulfur-32 in Type AB Presolar Silicon Carbide Grains?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ernst Zinner, Falk Herwig, Marco Pignatari, Peter Hoppe, Wataru Fujiya","submitted_at":"2013-10-01T20:39:26Z","abstract_excerpt":"We report C, Si, and S isotope measurements on 34 presolar silicon carbide grains of Type AB, characterized by 12C/13C < 10. Nitrogen, Mg-Al-, and Ca-Ti-isotopic compositions were measured on a subset of these grains. Three grains show large 32S excesses, a signature that has been previously observed for grains from supernovae (SNe). Enrichments in 32S may be due to contributions from the Si/S zone and the result of S molecule chemistry in still unmixed SN ejecta or due to incorporation of radioactive 32Si from C-rich explosive He shell ejecta. However, a SN origin remains unlikely for the thr"},"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":"1310.0485","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-10-01T20:39:26Z","cross_cats_sorted":[],"title_canon_sha256":"c7c533cdce4d30c084cb57057dba17051a5b5438206fd7150dd2668b44b810ef","abstract_canon_sha256":"df1730b946641a92911cd5f053ef7948b81503ad44d8de424a374e3644ec5da0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:11:35.160823Z","signature_b64":"+zSJ7wvpGS/yf5wDfDGFrnk3puhpqhc1f1MVskZbjnYyWD5QbC2jDm9BiDl8OZT1EvVhjFxW8fHceXiaXUkGCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd59bcbf665d3839daeac4f4dd67bc35aff9cf54b13232438597d54eb4fd4945","last_reissued_at":"2026-05-18T03:11:35.160310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:11:35.160310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Evidence for Radiogenic Sulfur-32 in Type AB Presolar Silicon Carbide Grains?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Ernst Zinner, Falk Herwig, Marco Pignatari, Peter Hoppe, Wataru Fujiya","submitted_at":"2013-10-01T20:39:26Z","abstract_excerpt":"We report C, Si, and S isotope measurements on 34 presolar silicon carbide grains of Type AB, characterized by 12C/13C < 10. Nitrogen, Mg-Al-, and Ca-Ti-isotopic compositions were measured on a subset of these grains. Three grains show large 32S excesses, a signature that has been previously observed for grains from supernovae (SNe). Enrichments in 32S may be due to contributions from the Si/S zone and the result of S molecule chemistry in still unmixed SN ejecta or due to incorporation of radioactive 32Si from C-rich explosive He shell ejecta. However, a SN origin remains unlikely for the thr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.0485","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":"1310.0485","created_at":"2026-05-18T03:11:35.160398+00:00"},{"alias_kind":"arxiv_version","alias_value":"1310.0485v1","created_at":"2026-05-18T03:11:35.160398+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.0485","created_at":"2026-05-18T03:11:35.160398+00:00"},{"alias_kind":"pith_short_12","alias_value":"XVM3ZP3GLU4D","created_at":"2026-05-18T12:28:06.772260+00:00"},{"alias_kind":"pith_short_16","alias_value":"XVM3ZP3GLU4DTWXK","created_at":"2026-05-18T12:28:06.772260+00:00"},{"alias_kind":"pith_short_8","alias_value":"XVM3ZP3G","created_at":"2026-05-18T12:28:06.772260+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/XVM3ZP3GLU4DTWXKYT2N2Z54GW","json":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW.json","graph_json":"https://pith.science/api/pith-number/XVM3ZP3GLU4DTWXKYT2N2Z54GW/graph.json","events_json":"https://pith.science/api/pith-number/XVM3ZP3GLU4DTWXKYT2N2Z54GW/events.json","paper":"https://pith.science/paper/XVM3ZP3G"},"agent_actions":{"view_html":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW","download_json":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW.json","view_paper":"https://pith.science/paper/XVM3ZP3G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1310.0485&json=true","fetch_graph":"https://pith.science/api/pith-number/XVM3ZP3GLU4DTWXKYT2N2Z54GW/graph.json","fetch_events":"https://pith.science/api/pith-number/XVM3ZP3GLU4DTWXKYT2N2Z54GW/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW/action/timestamp_anchor","attest_storage":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW/action/storage_attestation","attest_author":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW/action/author_attestation","sign_citation":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW/action/citation_signature","submit_replication":"https://pith.science/pith/XVM3ZP3GLU4DTWXKYT2N2Z54GW/action/replication_record"}},"created_at":"2026-05-18T03:11:35.160398+00:00","updated_at":"2026-05-18T03:11:35.160398+00:00"}