{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:K44RQ3AEOMKUKECORKSWCBEVKM","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":"baa7bb26f1f27fb39241bdbb6837c3717143ae7ae72ff93414d2909ba624b51c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-07T23:50:17Z","title_canon_sha256":"3f6fa90634dae7e569130607b299b9e1f85d7a787bca7167dcbf37a2b6dbffaa"},"schema_version":"1.0","source":{"id":"1202.1563","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.1563","created_at":"2026-05-18T01:58:32Z"},{"alias_kind":"arxiv_version","alias_value":"1202.1563v1","created_at":"2026-05-18T01:58:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.1563","created_at":"2026-05-18T01:58:32Z"},{"alias_kind":"pith_short_12","alias_value":"K44RQ3AEOMKU","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"K44RQ3AEOMKUKECO","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"K44RQ3AE","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:a2df53988bdb5a35d4f35abe2c6440638e9dafa7875a12e459517181ecc920ea","target":"graph","created_at":"2026-05-18T01:58:32Z","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":"Sulfur abundances derived from optical emission line measurements and ionization correction factors in planetary nebulae are systematically lower than expected for the objects' metallicities. We have carefully considered a large range of explanations for this \"sulfur anomaly\", including: (1) correlations between the size of the sulfur deficit and numerous nebular and central star properties; (2) ionization correction factors which under-correct for unobserved ions; (3) effects of dielectronic recombination on the sulfur ionization balance; (4) sequestering of S into dust and/or molecules; and ","authors_text":"A. I. Karakas, A. Speck, G. J. Ferland, M. Maguire, R. B. C. Henry","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-07T23:50:17Z","title":"The Curious Conundrum Regarding Sulfur Abundances In Planetary Nebulae"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.1563","kind":"arxiv","version":1},"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:f7547a5267140fca870137c63786cc8b540cf8eddb328587db5231eff11a27b0","target":"record","created_at":"2026-05-18T01:58:32Z","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":"baa7bb26f1f27fb39241bdbb6837c3717143ae7ae72ff93414d2909ba624b51c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2012-02-07T23:50:17Z","title_canon_sha256":"3f6fa90634dae7e569130607b299b9e1f85d7a787bca7167dcbf37a2b6dbffaa"},"schema_version":"1.0","source":{"id":"1202.1563","kind":"arxiv","version":1}},"canonical_sha256":"5739186c04731545104e8aa5610495530a4419bc8adf6eea1f5890f8ef551a2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5739186c04731545104e8aa5610495530a4419bc8adf6eea1f5890f8ef551a2a","first_computed_at":"2026-05-18T01:58:32.637354Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:32.637354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kcZI3MevURPRoNGxbMggQb/vfqDrIBY/C0AOMCvoBjiJs0yovIzca7y2T/HQK/5/cgNSF8K4fmZ7iQkCn30DBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:32.637879Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.1563","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f7547a5267140fca870137c63786cc8b540cf8eddb328587db5231eff11a27b0","sha256:a2df53988bdb5a35d4f35abe2c6440638e9dafa7875a12e459517181ecc920ea"],"state_sha256":"38f1cc0c260158f456889e8703c0dccfbb57d4eb84d58c69c000e09a23ddd294"}