{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:R32U2QALXG3QE7K7HWKTJLHTD3","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":"4e699294b44c7377684a1941bde1e97393c166f7941a547378c5feda30bc7850","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-04T21:02:15Z","title_canon_sha256":"0e9eedbd020dd3498efde76b3744f749f90cd146bbf97f33af95ca13da4945b8"},"schema_version":"1.0","source":{"id":"1201.1004","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.1004","created_at":"2026-05-18T01:58:57Z"},{"alias_kind":"arxiv_version","alias_value":"1201.1004v2","created_at":"2026-05-18T01:58:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.1004","created_at":"2026-05-18T01:58:57Z"},{"alias_kind":"pith_short_12","alias_value":"R32U2QALXG3Q","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"R32U2QALXG3QE7K7","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"R32U2QAL","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:d8cf083b304fbd36d258d7c207858431b7aaf624d1811ada379a684223cddaff","target":"graph","created_at":"2026-05-18T01:58:57Z","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 report the identification of a very metal-poor damped Lyman-alpha system (DLA) at z_abs = 3.067295 that is modestly carbon-enhanced, with an iron abundance of ~1/700 solar ([Fe/H] = -2.84) and [C,O/Fe] ~ +0.6. Such an abundance pattern is likely to be the result of nucleosynthesis by massive stars. On the basis of 17 metal absorption lines, we derive a 2 sigma upper limit on the DLA's kinetic temperature of T_DLA <= 4700 K, which is broadly consistent with the range of spin temperature estimates for DLAs at this redshift and metallicity. While the best-fitting abundance pattern shows the ex","authors_text":"2), (2) Swinburne University of Technology, 3), (3) International Centre for Radio Astronomy Research), Max Pettini (1, Michael Murphy (2) ((1) Institute of Astronomy, Ryan Cooke (1, University of Cambridge","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-04T21:02:15Z","title":"A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Lyman-alpha systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.1004","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:fd3465e6bcc1f45e3dca51073deeff85705b14531ab79dca57e32d812bc607d0","target":"record","created_at":"2026-05-18T01:58:57Z","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":"4e699294b44c7377684a1941bde1e97393c166f7941a547378c5feda30bc7850","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-01-04T21:02:15Z","title_canon_sha256":"0e9eedbd020dd3498efde76b3744f749f90cd146bbf97f33af95ca13da4945b8"},"schema_version":"1.0","source":{"id":"1201.1004","kind":"arxiv","version":2}},"canonical_sha256":"8ef54d400bb9b7027d5f3d9534acf31ec772873a8638baf82ade960cb8509b39","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8ef54d400bb9b7027d5f3d9534acf31ec772873a8638baf82ade960cb8509b39","first_computed_at":"2026-05-18T01:58:57.577822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:57.577822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Cjei/R2PKYxSBgxUxKYnH4zCOqCuRRCYJAUByE/9QXolIgYYXGaSv0YqomA9Gj/sZoBynwOTzh4CHFwXgVlQCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:57.578453Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.1004","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd3465e6bcc1f45e3dca51073deeff85705b14531ab79dca57e32d812bc607d0","sha256:d8cf083b304fbd36d258d7c207858431b7aaf624d1811ada379a684223cddaff"],"state_sha256":"b661c33549c4aaa332dba16ba2eb76546417077067c4f0ccd7e5c14d463ff441"}