{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:OCYGOJDG6IRI4YQN75E5BVQG2K","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":"6ba115d13680cf2a1df6c963d1938b789986dd41d4f56c7c1c9cc963f4be2f5a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-04-11T17:12:25Z","title_canon_sha256":"1fab6d96d89d50a553de13640cc40a14b2e3d420da99bd9b3e43dc82397b7f52"},"schema_version":"1.0","source":{"id":"astro-ph/9704102","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9704102","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9704102v1","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9704102","created_at":"2026-05-18T01:40:17Z"},{"alias_kind":"pith_short_12","alias_value":"OCYGOJDG6IRI","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"OCYGOJDG6IRI4YQN","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"OCYGOJDG","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:ad09fc74006acfaef27b80205dbc2538959a89bd1333b80eec2b6d36532faaed","target":"graph","created_at":"2026-05-18T01:40:17Z","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":"We report new observations of ZnII and CrII absorption lines in 10 damped \\lya systems (DLAs), mostly at redshift $z_{abs} \\simgt 2.5$ . By combining these results with those from our earlier survey (Pettini et al. 1994) and other recent data, we construct a sample of 34 measurements (or upper limits) of the Zn abundance relative to hydrogen [Zn/H]; the sample includes more than one third of the total number of DLAs known.\n  The plot of the abundance of Zn as a function of redshift reinforces the two main findings of our previous study. (1) Damped \\lya systems are mostly metal-poor, at all red","authors_text":"David L. King (Royal Greenwich Observatory), Linda J. Smith (University College London), Max Pettini (Royal Greenwich Observatory), Richard W. Hunstead (University of Sydney)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1997-04-11T17:12:25Z","title":"The Metallicity of High Redshift Galaxies: The Abundance of Zinc in 34 Damped Lyman Alpha Systems from z = 0.7 to 3.4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9704102","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:fab63224cd20a01ba2ecbb557c48e06badddb089589f4edef94d5d9fd60fc46b","target":"record","created_at":"2026-05-18T01:40:17Z","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":"6ba115d13680cf2a1df6c963d1938b789986dd41d4f56c7c1c9cc963f4be2f5a","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1997-04-11T17:12:25Z","title_canon_sha256":"1fab6d96d89d50a553de13640cc40a14b2e3d420da99bd9b3e43dc82397b7f52"},"schema_version":"1.0","source":{"id":"astro-ph/9704102","kind":"arxiv","version":1}},"canonical_sha256":"70b0672466f2228e620dff49d0d606d2a6c13509c101d3e4d1edbc38da3be4fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"70b0672466f2228e620dff49d0d606d2a6c13509c101d3e4d1edbc38da3be4fe","first_computed_at":"2026-05-18T01:40:17.805789Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:17.805789Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2biHkmgRGbKxZ+AOazR0LvFFcy4jGa9PUc7bxqGLCgcyZVluXKT2A/Op5bAjcMx371sXCgthGiOoWAzM5mhKBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:17.806305Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9704102","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fab63224cd20a01ba2ecbb557c48e06badddb089589f4edef94d5d9fd60fc46b","sha256:ad09fc74006acfaef27b80205dbc2538959a89bd1333b80eec2b6d36532faaed"],"state_sha256":"b1bd6abcbbcda3f8ca61fff964a7c0cdd9386904ee4a56d78659a981a02a37ab"}