{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:T64TV3HIUQXV7DF7ME24MYLYEP","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":"4e458869d2567260b613e9e291c3f869829f2100cc2d2ab66d47fa038b7f2b51","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-08T20:24:22Z","title_canon_sha256":"c583680a56239e6d4fbf628653a8743250c5eee735384a84470389d7aef1ead8"},"schema_version":"1.0","source":{"id":"1307.2259","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.2259","created_at":"2026-05-18T01:48:58Z"},{"alias_kind":"arxiv_version","alias_value":"1307.2259v2","created_at":"2026-05-18T01:48:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.2259","created_at":"2026-05-18T01:48:58Z"},{"alias_kind":"pith_short_12","alias_value":"T64TV3HIUQXV","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"T64TV3HIUQXV7DF7","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"T64TV3HI","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:d9952ad18ca041e6f8ab5f1f35f5b31da665fcd3cda87fbcddc6f7f482023bc8","target":"graph","created_at":"2026-05-18T01:48:58Z","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 new measurements of the intensity of the ionizing ultraviolet background and the global emissivity of ionizing photons over 2 < z < 5. Our results are based on a suite of updated measurements of physical properties of the high-redshift intergalactic medium (IGM), including gas temperatures and the opacity of the IGM to Ly-alpha and ionizing photons. Consistent with previous works, we find a relatively flat hydrogen photoionization rate over 2 < z < 5, although our measurements are roughly a factor of two higher than the 2008 values of Faucher-Giguere et al., due primarily to our low","authors_text":"George D. Becker, James S. Bolton","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-08T20:24:22Z","title":"New Measurements of the Ionizing Ultraviolet Background over 2 < z < 5 and Implications for Hydrogen Reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.2259","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":"sha256:94051c8c704760ac7635ee1f176d9bef81d1be6b3ce9b5540d7a6faada0a3fe9","target":"record","created_at":"2026-05-18T01:48:58Z","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":"4e458869d2567260b613e9e291c3f869829f2100cc2d2ab66d47fa038b7f2b51","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-07-08T20:24:22Z","title_canon_sha256":"c583680a56239e6d4fbf628653a8743250c5eee735384a84470389d7aef1ead8"},"schema_version":"1.0","source":{"id":"1307.2259","kind":"arxiv","version":2}},"canonical_sha256":"9fb93aece8a42f5f8cbf6135c6617823ff1697c95bf49b8717c0090d6ddb0b15","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fb93aece8a42f5f8cbf6135c6617823ff1697c95bf49b8717c0090d6ddb0b15","first_computed_at":"2026-05-18T01:48:58.492171Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:58.492171Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q1q662PMXGCieQvgWkjzCE0Z8yJ5Sbhqhsj9TnQFmwcutFz/022ABd/huW3QMRVOX+/hv6DIVPiRRQg2XjFmAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:58.492785Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.2259","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:94051c8c704760ac7635ee1f176d9bef81d1be6b3ce9b5540d7a6faada0a3fe9","sha256:d9952ad18ca041e6f8ab5f1f35f5b31da665fcd3cda87fbcddc6f7f482023bc8"],"state_sha256":"217e36c409e7a3996401c15153437398daa94a8c54cf852c47b06d47b97aca4f"}