{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:5T2SCSEWEMIS3Y4MUJEXOPPCAS","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":"c78ab4cec58ddc751aac86465bc9ab853c8a8a479813a7b8dcde7609d2aa9a3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-18T18:01:10Z","title_canon_sha256":"0c45322a6f210e588dad5ea551e5fb18d912c59f135aceff6f2b9354065dc8be"},"schema_version":"1.0","source":{"id":"1805.07364","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.07364","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"arxiv_version","alias_value":"1805.07364v2","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.07364","created_at":"2026-05-18T00:09:35Z"},{"alias_kind":"pith_short_12","alias_value":"5T2SCSEWEMIS","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_16","alias_value":"5T2SCSEWEMIS3Y4M","created_at":"2026-05-18T12:32:08Z"},{"alias_kind":"pith_short_8","alias_value":"5T2SCSEW","created_at":"2026-05-18T12:32:08Z"}],"graph_snapshots":[{"event_id":"sha256:b2e810e9fa9d82b7424cf8098d1aee6e0147bfd0cb64f67a77352c215e2fc93e","target":"graph","created_at":"2026-05-18T00:09:35Z","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 new Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) absorption-line survey to study halo gas around 16 luminous red galaxies (LRGs) at z=0.21-0.55. The LRGs are selected uniformly with stellar mass Mstar>1e11 Msun and no prior knowledge of the presence/absence of any absorption features. Based on observations of the full Lyman series, we obtain accurate measurements of neutral hydrogen column density N(HI) and find that high-N(HI) gas is common in these massive quiescent halos with a median of <log N(HI)> = 16.6 at projected distances d<~160 kpc. We measure a mean c","authors_text":"Benjamin J. Weiner, Fakhri S. Zahedy, Hsiao-Wen Chen, Jean-Rene Gauthier, Rebecca M. Pierce, Sean D. Johnson, Yun-Hsin Huang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-18T18:01:10Z","title":"Characterizing Circumgalactic Gas around Massive Ellipticals at z ~ 0.4 I. Initial Results"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.07364","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":"sha256:1a99b450017167eba7d46999c973c6500509f3fe634a14f54014b5d59c298290","target":"record","created_at":"2026-05-18T00:09:35Z","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":"c78ab4cec58ddc751aac86465bc9ab853c8a8a479813a7b8dcde7609d2aa9a3e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-05-18T18:01:10Z","title_canon_sha256":"0c45322a6f210e588dad5ea551e5fb18d912c59f135aceff6f2b9354065dc8be"},"schema_version":"1.0","source":{"id":"1805.07364","kind":"arxiv","version":2}},"canonical_sha256":"ecf521489623112de38ca249773de204a300a6ddb311f8f0ae18bf6c0b3cc401","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ecf521489623112de38ca249773de204a300a6ddb311f8f0ae18bf6c0b3cc401","first_computed_at":"2026-05-18T00:09:35.577038Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:35.577038Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DrEkxJY82HHwbwqNftXyiecAl20fZ6kpjTSXyYcNcB0Z5opYuyBfkgkFsDJc1sJUD1kC5w0YP8nHAyKTETV3DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:35.577531Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.07364","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a99b450017167eba7d46999c973c6500509f3fe634a14f54014b5d59c298290","sha256:b2e810e9fa9d82b7424cf8098d1aee6e0147bfd0cb64f67a77352c215e2fc93e"],"state_sha256":"1948d79fdca1bdfd5745d56614375bf3cf9742569705ffedc52b09123f24cb6e"}