{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EKUBW4IWZLSO2DC6OA3UEHIHAK","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":"0ad6609aa824c072c31e114b8e0cee2c3969204cc071b50b99dee7a6bf2f7751","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T09:27:07Z","title_canon_sha256":"2c7442a5ac85a69abd9e7b2093c2d54b42f3db866fa07816f3ab3505f7985a13"},"schema_version":"1.0","source":{"id":"1502.03921","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.03921","created_at":"2026-05-18T02:17:42Z"},{"alias_kind":"arxiv_version","alias_value":"1502.03921v1","created_at":"2026-05-18T02:17:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.03921","created_at":"2026-05-18T02:17:42Z"},{"alias_kind":"pith_short_12","alias_value":"EKUBW4IWZLSO","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EKUBW4IWZLSO2DC6","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EKUBW4IW","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:9d53d037e54d7ae9c371b9e493863fe8792cf7b33dc85ba7abddec461d282a6a","target":"graph","created_at":"2026-05-18T02:17:42Z","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 present a detailed analysis of three extremely strong intervening DLAs (log N(HI)>=21.7) observed towards quasars with VLT/UVES. We measure overall metallicities of [Zn/H]~-1.2, -1.3 and -0.7 at respectively zabs=2.34 towards SDSS J2140-0321 (log N(HI) = 22.4+/-0.1), zabs=3.35 towards SDSS J1456+1609 (log N(HI) = 21.7+/-0.1) and zabs=2.25 towards SDSS J0154+1935 (log N(HI) = 21.75+/-0.15). We detect H2 towards J2140-0321 (log N(H2) = 20.13+/-0.07) and J1456+1609 (log N(H2) = 17.10+/-0.09) and argue for a tentative detection towards J0154+1935. Absorption from the excited fine-structure leve","authors_text":"C. Ledoux, H. Rahmani, I. P\\^aris, N. Gupta, P. Noterdaeme, P. Petitjean, R. Srianand, S. L\\'opez","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T09:27:07Z","title":"VLT/UVES observations of extremely strong intervening damped Lyman-alpha systems: Molecular hydrogen and excited carbon, oxygen and silicon at log N(HI)=22.4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.03921","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":"sha256:1232caffb6008c5515d7e5735cac21f00b6fd8d7da10dfff99c4138807a0a3b7","target":"record","created_at":"2026-05-18T02:17:42Z","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":"0ad6609aa824c072c31e114b8e0cee2c3969204cc071b50b99dee7a6bf2f7751","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-13T09:27:07Z","title_canon_sha256":"2c7442a5ac85a69abd9e7b2093c2d54b42f3db866fa07816f3ab3505f7985a13"},"schema_version":"1.0","source":{"id":"1502.03921","kind":"arxiv","version":1}},"canonical_sha256":"22a81b7116cae4ed0c5e7037421d07028a2c8b6c532f6e2c4676654b7d2e7d6c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22a81b7116cae4ed0c5e7037421d07028a2c8b6c532f6e2c4676654b7d2e7d6c","first_computed_at":"2026-05-18T02:17:42.440241Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:42.440241Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DhQQefbVIvJsqTLck8CZVSZDJgHDxyhaV+xakO2jXN+6yIIhszINaGoxm8AzHD0UTdkfBj+5qU3t+wCmSJpgCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:42.440757Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.03921","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1232caffb6008c5515d7e5735cac21f00b6fd8d7da10dfff99c4138807a0a3b7","sha256:9d53d037e54d7ae9c371b9e493863fe8792cf7b33dc85ba7abddec461d282a6a"],"state_sha256":"9640dad66e33c66e69f2236f787d8bc979960ee7d6af5b05e46737d629a9b2b1"}