{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:RGXWF2UEBI27DBAW2OOMANJLQN","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":"7766fc8f39c79c939afd21e5517bd287ce0e963b2bf89a429c565294f9333453","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-09T20:00:45Z","title_canon_sha256":"eac5aeba7a015e14ff9e0ec68f45b135c05c0a142e8e31d338de85b9191d5f1f"},"schema_version":"1.0","source":{"id":"1610.02711","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.02711","created_at":"2026-05-18T00:36:33Z"},{"alias_kind":"arxiv_version","alias_value":"1610.02711v2","created_at":"2026-05-18T00:36:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.02711","created_at":"2026-05-18T00:36:33Z"},{"alias_kind":"pith_short_12","alias_value":"RGXWF2UEBI27","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RGXWF2UEBI27DBAW","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RGXWF2UE","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:724357b04e4456b15f1f018dac646e23fadfe7c6bda5ea768307144beb7115f3","target":"graph","created_at":"2026-05-18T00:36:33Z","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 study the mean absorption spectrum of the Damped Lyman alpha population at $z\\sim 2.6$ by stacking normalized, rest-frame shifted spectra of $\\sim 27\\,000$ DLAs from the DR12 of BOSS/SDSS-III. We measure the equivalent widths of 50 individual metal absorption lines in 5 intervals of DLA hydrogen column density, 5 intervals of DLA redshift, and overall mean equivalent widths for an additional 13 absorption features from groups of strongly blended lines. The mean equivalent width of low-ionization lines increases with $N_{\\rm HI}$, whereas for high-ionization lines the increase is much weaker","authors_text":"Andreu Arinyo-i-Prats, Donald G. York, Donald P. Schneider, Ignasi P\\'erez-R\\`afols, Jian Ge, Jordi Miralda-Escud\\'e, Llu\\'is Mas-Ribas, Pasquier Noterdaeme, Patrick Petitjean","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-09T20:00:45Z","title":"The Mean Metal-line Absorption Spectrum of DLAs in BOSS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.02711","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":"sha256:16839cb0dc95efbf63362d9b7dffd8014423405f762dd79d66f0695d17cfd207","target":"record","created_at":"2026-05-18T00:36:33Z","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":"7766fc8f39c79c939afd21e5517bd287ce0e963b2bf89a429c565294f9333453","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2016-10-09T20:00:45Z","title_canon_sha256":"eac5aeba7a015e14ff9e0ec68f45b135c05c0a142e8e31d338de85b9191d5f1f"},"schema_version":"1.0","source":{"id":"1610.02711","kind":"arxiv","version":2}},"canonical_sha256":"89af62ea840a35f18416d39cc0352b8374fb36651c765f99c62f1fb230b8dbb6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89af62ea840a35f18416d39cc0352b8374fb36651c765f99c62f1fb230b8dbb6","first_computed_at":"2026-05-18T00:36:33.087498Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:33.087498Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6dBGrMkMBvE4vd5M8gQ/SGqvUes/T9gwAZOIKPqO6Xe/0mQepmIHp/iIMyYurTEaPzyw778tPCwBwYE/g2dnAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:33.087969Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.02711","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:16839cb0dc95efbf63362d9b7dffd8014423405f762dd79d66f0695d17cfd207","sha256:724357b04e4456b15f1f018dac646e23fadfe7c6bda5ea768307144beb7115f3"],"state_sha256":"f71b270689b729d26c42b35e2b0fa9898295a4cdf839b5f73bd6223f3185f2d2"}