{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:ZD7WFTQVPI6XAIAHKILGJMTQS5","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":"2f2657b7db645d02d637304c2eadefe0763c514cf48ce07976171ae0e9e1efb1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-27T16:56:02Z","title_canon_sha256":"37bd210215465dcf62ae4863bb49086a8e5c2d098696fb21e965e68d12050fa6"},"schema_version":"1.0","source":{"id":"0905.4473","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.4473","created_at":"2026-05-18T02:13:31Z"},{"alias_kind":"arxiv_version","alias_value":"0905.4473v2","created_at":"2026-05-18T02:13:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.4473","created_at":"2026-05-18T02:13:31Z"},{"alias_kind":"pith_short_12","alias_value":"ZD7WFTQVPI6X","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"ZD7WFTQVPI6XAIAH","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"ZD7WFTQV","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:0b9a93629b74ccda0a38e90b79dee9a4cf111c9fdb0bd63922c48ccb88f6f341","target":"graph","created_at":"2026-05-18T02:13:31Z","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":"We have combined the results from our recent observations of Damped and sub-Damped Lyman-alpha systems with the MIKE and UVES spectrographs on the Magellan Clay and VLT Kueyen telescopes with ones from the literature to determine the N(HI)-weighted mean metallicity of these systems based both on Fe, a depleted element in QSO absorbers and the local ISM, and Zn a relatively undepleted element. In each case, the N(HI)-weighted mean metallicity is higher and shows faster evolution in sub-DLAs than the classical DLA systems. Large grids of photoionisation models over the sub-DLA \\nhI range with CL","authors_text":"Celine Peroux, Donald G. York, James T. Lauroesch, Joseph D. Meiring, Pushpa Khare, Varsha P. Kulkarni","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-27T16:56:02Z","title":"A MIKE + UVES survey of Sub-Damped Lyman-Alpha Systems at z<1.5"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.4473","kind":"arxiv","version":2},"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:b4919e8b82a09bfb3e2431c56cc200d5ac7da1fd8091528bc950743459ec97d0","target":"record","created_at":"2026-05-18T02:13:31Z","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":"2f2657b7db645d02d637304c2eadefe0763c514cf48ce07976171ae0e9e1efb1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-27T16:56:02Z","title_canon_sha256":"37bd210215465dcf62ae4863bb49086a8e5c2d098696fb21e965e68d12050fa6"},"schema_version":"1.0","source":{"id":"0905.4473","kind":"arxiv","version":2}},"canonical_sha256":"c8ff62ce157a3d702007521664b270976c5ff400021afef6101b6720f7d6c32a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c8ff62ce157a3d702007521664b270976c5ff400021afef6101b6720f7d6c32a","first_computed_at":"2026-05-18T02:13:31.539529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:13:31.539529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WnP+IxPFVHZd5wqX+oLZWkdFPgj5PTNLpH6tiqShFtCuFysJB4UJWEKkNCo75nr3m2dk1qdBlBlxj3OUW2SPBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:13:31.540179Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.4473","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b4919e8b82a09bfb3e2431c56cc200d5ac7da1fd8091528bc950743459ec97d0","sha256:0b9a93629b74ccda0a38e90b79dee9a4cf111c9fdb0bd63922c48ccb88f6f341"],"state_sha256":"cdd883fd27bec84842fee2f4367264ced82e8114955afd0d7ee4f2a0643b39ec"}