{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:FPBNUNFV6HUMUL463M6HNFY7AM","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":"47e3e5082015fa20eef2299c8c00c6b66fb21554c167192eb0ee9943a0bac4e9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-02-15T21:00:05Z","title_canon_sha256":"c4c5f660565620d571289a7663e341a30887d28e2a41c57639b1b21fb71fe9a6"},"schema_version":"1.0","source":{"id":"1302.3886","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.3886","created_at":"2026-05-18T01:51:36Z"},{"alias_kind":"arxiv_version","alias_value":"1302.3886v1","created_at":"2026-05-18T01:51:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.3886","created_at":"2026-05-18T01:51:36Z"},{"alias_kind":"pith_short_12","alias_value":"FPBNUNFV6HUM","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"FPBNUNFV6HUMUL46","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"FPBNUNFV","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:044ca4e6e3af5070e76d123f7b2cf782280387828b892a841dbafc62d31824b3","target":"graph","created_at":"2026-05-18T01:51:36Z","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":"The presence of O VI ions can be indicative of plasma temperatures of a few times 10^5 K that is expected in heat conduction layers between the hot shocked stellar wind gas at several 10^6 K and the cooler (~10,000 K) nebular gas of planetary nebulae (PNe). We have used FUSE observations of PNe to search for nebular O VI emission or absorption as a diagnostic of conduction layer to ensure the presence of hot interior gas. Three PNe showing nebular O VI, namely IC 418, NGC 2392, and NGC 6826, have been selected for Chandra observations and diffuse X-ray emission is indeed detected in each of th","authors_text":"D. Schonberner, M.A. Guerrero, M. Steffen, N. Ruiz, R.A. Gruendl, R. Jacob, Y.-H. Chu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-02-15T21:00:05Z","title":"Diffuse X-ray Emission from Planetary Nebulae with Nebular O VI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.3886","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":"sha256:479a0c5dd58d369dbccd5f09a846f22ce23cd7f0b5270950b116ad05e9f63f19","target":"record","created_at":"2026-05-18T01:51:36Z","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":"47e3e5082015fa20eef2299c8c00c6b66fb21554c167192eb0ee9943a0bac4e9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-02-15T21:00:05Z","title_canon_sha256":"c4c5f660565620d571289a7663e341a30887d28e2a41c57639b1b21fb71fe9a6"},"schema_version":"1.0","source":{"id":"1302.3886","kind":"arxiv","version":1}},"canonical_sha256":"2bc2da34b5f1e8ca2f9edb3c76971f0333f41ad0b66c263b4c5ee45f0cf817da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2bc2da34b5f1e8ca2f9edb3c76971f0333f41ad0b66c263b4c5ee45f0cf817da","first_computed_at":"2026-05-18T01:51:36.161748Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:36.161748Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3f+QDFPy3CG8ZznZDt3IiLXHpDFEf4SCi/E6vRtjR0K7y0B47R9DR0PdC7fkZM+5+Gq+wEafA7XuNxWqpB8YDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:36.162360Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.3886","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:479a0c5dd58d369dbccd5f09a846f22ce23cd7f0b5270950b116ad05e9f63f19","sha256:044ca4e6e3af5070e76d123f7b2cf782280387828b892a841dbafc62d31824b3"],"state_sha256":"a682ea01913429b9ffcd663d85d2ea810462ec42da83a658c9c40806e03e59f6"}