{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:VQSAHOY3TZ5NAKNR5NW3OMJVFI","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":"3e49a29bb11e4166eb5ae0911f78a555b8d88138b664526957a5b7f11db08aac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-26T22:58:10Z","title_canon_sha256":"b9e908d0b5d25e7f0334f03db6ca17b9f04ee7a9f5e423d011a6de44cd7eb88c"},"schema_version":"1.0","source":{"id":"1302.6622","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.6622","created_at":"2026-05-18T01:51:26Z"},{"alias_kind":"arxiv_version","alias_value":"1302.6622v1","created_at":"2026-05-18T01:51:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.6622","created_at":"2026-05-18T01:51:26Z"},{"alias_kind":"pith_short_12","alias_value":"VQSAHOY3TZ5N","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"VQSAHOY3TZ5NAKNR","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"VQSAHOY3","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:2cb6c82cb7f8fc1cd3241549e4bbed64bc8ef41e528e0a4f0e49ee7d8430650e","target":"graph","created_at":"2026-05-18T01:51:26Z","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 investigated the distribution and evolution of ~3100 intergalactic HI absorbers with HI column densities log N(HI) = [12.75, 17.0] at 1.9 < z < 3.2, using 18 high resolution, high S/N quasar spectra obtained from the ESO VLT/UVES archive. We used two sets of Voigt profile fitting analysis, one including all the available high-order Lyman lines to obtain reliable HI column densities of saturated lines, and another using only the Ly-alpha lines. There is no significant difference between the results from the two fits. Combining our results with literature data, the mean number density at","authors_text":"2), (2) Department of Astronomy, Adrian M. Partl (1), Cambridge, Germany, Madingley Road, Robert F. Carswell (3), Tae-Sun Kim (1, UK), University of Wisconsin-Madison, Volker M\\\"uller (1) ((1) Leibniz-Institut f\\\"ur Astrophysik Potsdam, WI (3) Institute of Astronomy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-26T22:58:10Z","title":"The evolution of HI and CIV quasar absorption line systems at 1.9 < z < 3.2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.6622","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:d9c5d9a84f0102d4c815648d9f7e4551a9b22df7930e60e554dcbc0c47ba6b14","target":"record","created_at":"2026-05-18T01:51:26Z","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":"3e49a29bb11e4166eb5ae0911f78a555b8d88138b664526957a5b7f11db08aac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-02-26T22:58:10Z","title_canon_sha256":"b9e908d0b5d25e7f0334f03db6ca17b9f04ee7a9f5e423d011a6de44cd7eb88c"},"schema_version":"1.0","source":{"id":"1302.6622","kind":"arxiv","version":1}},"canonical_sha256":"ac2403bb1b9e7ad029b1eb6db731352a0315189c7c6aec0a0c93df4a2672d882","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac2403bb1b9e7ad029b1eb6db731352a0315189c7c6aec0a0c93df4a2672d882","first_computed_at":"2026-05-18T01:51:26.957865Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:26.957865Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MEyBda076rZIrq58R1LAGiHIjUXEo70w35QPi/HdI/SD9Yhaf1Sjjeb6RT/BEyMsI6mol4oU06LXDSCELl3gDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:26.958475Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.6622","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9c5d9a84f0102d4c815648d9f7e4551a9b22df7930e60e554dcbc0c47ba6b14","sha256:2cb6c82cb7f8fc1cd3241549e4bbed64bc8ef41e528e0a4f0e49ee7d8430650e"],"state_sha256":"0a4507bd2e87428badf62da1d0492240fb399347f3451c893ce2e3184a669818"}