{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:AQOGNXTFPHQRCXR5SYOQA2J64M","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":"979b60d13b6d5a091ec2be8d1914e6b9fd7fbe95ee99a143958f036c8d21d9ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-17T11:02:41Z","title_canon_sha256":"b64b21343ed77f309c58832b9dbc2bf7316c726693418c3ee7fc336c304824d5"},"schema_version":"1.0","source":{"id":"1307.4576","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4576","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4576v2","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4576","created_at":"2026-05-18T01:48:43Z"},{"alias_kind":"pith_short_12","alias_value":"AQOGNXTFPHQR","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"AQOGNXTFPHQRCXR5","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"AQOGNXTF","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:7bc43e0a654d936415bf74591bc490de6ed5a8b76dd09c5f540b74be5785ab70","target":"graph","created_at":"2026-05-18T01:48:43Z","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":"The formation of the first virialized structures in overdensities dates back to ~9 Gyr ago, i.e. in the redshift range z ~ 1.4 - 1.6. Some models of structure formation predict that the star formation activity in clusters was high at that epoch, implying large reservoirs of cold molecular gas. Aiming at finding a trace of this expected high molecular gas content in primeval clusters, we searched for the 12CO(2-1) line emission in the most luminous active galactic nucleus (AGN) of the cluster around the radio galaxy 7C 1756+6520 at z ~ 1.4, one of the farthest spectroscopic confirmed clusters. ","authors_text":"1), (2) INAF-OAA, (3) Obs. de Paris, (4) University of Bologna), A. Mignano (1), E. Sani (2), F. Combes (3), F. Fontani (2) ((1) INAF-IRA, Italian ARC, L. Magrini (2), R. Paladino (4, V. Casasola (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-17T11:02:41Z","title":"A gas-rich AGN near the centre of a galaxy cluster at z ~ 1.4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4576","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":"sha256:3e2efbfa38f9981e02fe9b8515cdb9d3412ba00ff40aac223fd65df3bd504bd0","target":"record","created_at":"2026-05-18T01:48:43Z","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":"979b60d13b6d5a091ec2be8d1914e6b9fd7fbe95ee99a143958f036c8d21d9ec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-17T11:02:41Z","title_canon_sha256":"b64b21343ed77f309c58832b9dbc2bf7316c726693418c3ee7fc336c304824d5"},"schema_version":"1.0","source":{"id":"1307.4576","kind":"arxiv","version":2}},"canonical_sha256":"041c66de6579e1115e3d961d00693ee307ae127772b1121cabb210cc153fa3dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"041c66de6579e1115e3d961d00693ee307ae127772b1121cabb210cc153fa3dc","first_computed_at":"2026-05-18T01:48:43.524661Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:43.524661Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rzAkhD1bezSaCwkJYJ7c/6m5ACZIy3ZvOLzXXCeEZ9LR0Vbb9LL2s1Ij2MXXJE4fhPz3ny74MBUb2OKf3k4PAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:43.525181Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.4576","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e2efbfa38f9981e02fe9b8515cdb9d3412ba00ff40aac223fd65df3bd504bd0","sha256:7bc43e0a654d936415bf74591bc490de6ed5a8b76dd09c5f540b74be5785ab70"],"state_sha256":"8a6529f2fb5f05665f365e0b3e6ae600a89ecc8a4c13f2d1d238a93613638123"}