{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5W3LGOVY44O6T3QOLG33YGH4DA","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":"6aa8e636c6415ae163c0873650b4b86df5b395d807486043047e651b06ec600e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-21T21:00:16Z","title_canon_sha256":"2c086c5b58f435840e476c5c33e640a2df9a9fd9a97702df452183e06bff9ae7"},"schema_version":"1.0","source":{"id":"1411.6016","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.6016","created_at":"2026-05-18T01:35:49Z"},{"alias_kind":"arxiv_version","alias_value":"1411.6016v1","created_at":"2026-05-18T01:35:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.6016","created_at":"2026-05-18T01:35:49Z"},{"alias_kind":"pith_short_12","alias_value":"5W3LGOVY44O6","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"5W3LGOVY44O6T3QO","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"5W3LGOVY","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:a1e72e6f796d6bc70046f33b8ddd877d99b907e5104654c4b8e9c1c8c901e103","target":"graph","created_at":"2026-05-18T01:35:49Z","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 use spectroscopy of close pairs of quasars to study diffuse gas in the circumgalactic medium (CGM) surrounding a sample of 40 Damped Lya systems (DLAs). The primary sightline in each quasar pair probes an intervening DLA in the redshift range 1.6 < z_DLA < 3.6, such that the second quasar sightline then probes Lya, CII, SiII, and CIV absorption in the CGM transverse to the DLA to projected distances $R_{\\perp} < 300$ kpc. Analysis of the Lya profiles in these CGM sightlines constrains the covering fraction (f_C) of optically thick HI (having column density N_HI > 10^17.2 cm^-2) to be greate","authors_text":"Adam Myers, Joseph F. Hennawi, J. Xavier Prochaska, Kate H. R. Rubin, Marie Wingyee Lau, Robert A. Simcoe","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-21T21:00:16Z","title":"Dissecting the Gaseous Halos of z~2 Damped Ly$\\alpha$ Systems with Close Quasar Pairs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.6016","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:e562213eac1f05c7a24cdf7a30407736865413457c852b8d2bd1316b90a5b775","target":"record","created_at":"2026-05-18T01:35:49Z","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":"6aa8e636c6415ae163c0873650b4b86df5b395d807486043047e651b06ec600e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-21T21:00:16Z","title_canon_sha256":"2c086c5b58f435840e476c5c33e640a2df9a9fd9a97702df452183e06bff9ae7"},"schema_version":"1.0","source":{"id":"1411.6016","kind":"arxiv","version":1}},"canonical_sha256":"edb6b33ab8e71de9ee0e59b7bc18fc1837214c7d6ca4c2e51f4c6b26ef027149","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"edb6b33ab8e71de9ee0e59b7bc18fc1837214c7d6ca4c2e51f4c6b26ef027149","first_computed_at":"2026-05-18T01:35:49.700621Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:49.700621Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0WK//sfqNBpOFBMDG+89HAgFIBezx7UydTB7bgfX/26bXJCMkG0w29z53xESAkJfS/vv8kTBxzdrys+LUe+hBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:49.701287Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.6016","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e562213eac1f05c7a24cdf7a30407736865413457c852b8d2bd1316b90a5b775","sha256:a1e72e6f796d6bc70046f33b8ddd877d99b907e5104654c4b8e9c1c8c901e103"],"state_sha256":"a19359f25d069e4c62fd1f62d94c8fb4c20b105ec4dfe8ad9e3686ace95e8f44"}