{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:W2A7VTD5MA26QXQALLA2U25HWD","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":"9629d623e144f6f5282e1b557068ebe83e81080feb7d07098915e7cae3fa0f4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-14T19:23:32Z","title_canon_sha256":"b0e67e2c20b45cb1385ff077b26e8f63e8de3984ff91a5153c41d91d51e87194"},"schema_version":"1.0","source":{"id":"1706.04645","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.04645","created_at":"2026-05-18T00:41:31Z"},{"alias_kind":"arxiv_version","alias_value":"1706.04645v1","created_at":"2026-05-18T00:41:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.04645","created_at":"2026-05-18T00:41:31Z"},{"alias_kind":"pith_short_12","alias_value":"W2A7VTD5MA26","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_16","alias_value":"W2A7VTD5MA26QXQA","created_at":"2026-05-18T12:31:49Z"},{"alias_kind":"pith_short_8","alias_value":"W2A7VTD5","created_at":"2026-05-18T12:31:49Z"}],"graph_snapshots":[{"event_id":"sha256:9cd9ffad46023f4046820b763eb05882785672b282c65586f19fbbdc80deb0a3","target":"graph","created_at":"2026-05-18T00:41:31Z","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":"Gas metallicity is a key quantity used to determine the physical conditions of gaseous clouds in a wide range of astronomical environments, including interstellar and intergalactic space. In particular, considerable effort in circumgalactic medium (CGM) studies focuses on metallicity measurements, because gas metallicity serves as a critical discriminator for whether the observed heavy ions in the CGM originate in chemically-enriched outflows or in more chemically-pristine gas accreted from the intergalactic medium. However, because the gas is ionized, a necessary first step in determining CGM","authors_text":"(2) Princeton University, 3), (3) Carnegie Observatories), Fakhri S. Zahedy (1, Hsiao-Wen Chen (1), John S. Mulchaey (3) ((1) The University of Chicago, Michael Rauch (3), Sean D. Johnson (2)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-14T19:23:32Z","title":"Gauging Metallicity of Diffuse Gas Under An Uncertain Ionizing Radiation Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.04645","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":"sha256:66c9b06a30a4709be8d0f166c15a0ddf32a46b775d174558eab973fdaa2e9829","target":"record","created_at":"2026-05-18T00:41:31Z","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":"9629d623e144f6f5282e1b557068ebe83e81080feb7d07098915e7cae3fa0f4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-14T19:23:32Z","title_canon_sha256":"b0e67e2c20b45cb1385ff077b26e8f63e8de3984ff91a5153c41d91d51e87194"},"schema_version":"1.0","source":{"id":"1706.04645","kind":"arxiv","version":1}},"canonical_sha256":"b681facc7d6035e85e005ac1aa6ba7b0f32d4d668573106571fbf6d1a041176d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b681facc7d6035e85e005ac1aa6ba7b0f32d4d668573106571fbf6d1a041176d","first_computed_at":"2026-05-18T00:41:31.959276Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:31.959276Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wPQEW7B8vd7U0eBIPWlLOUIHtQMr0BJmWLTHsKqVZ3DYgLn6faUnUfayOsvjYGJu938veJXEHhtE8rW6rvhDAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:31.959978Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.04645","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:66c9b06a30a4709be8d0f166c15a0ddf32a46b775d174558eab973fdaa2e9829","sha256:9cd9ffad46023f4046820b763eb05882785672b282c65586f19fbbdc80deb0a3"],"state_sha256":"c7ed8729ae62612f7fcf154570b7320e3fcfe08be32fe039fee5b87a5ecc1263"}