{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:RJFGPQSNBPCY4ZI7UDUFYFQHQR","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":"aa908730cf113ae88135277246f0dc74b263e84b43f454bb8b7aab9e3026002c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-31T21:00:11Z","title_canon_sha256":"79959cbe6fc81bc277189fbd841f1dff832ea44ac31b4855df143f601f2e89d8"},"schema_version":"1.0","source":{"id":"astro-ph/0304001","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0304001","created_at":"2026-07-04T15:22:59Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0304001v1","created_at":"2026-07-04T15:22:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0304001","created_at":"2026-07-04T15:22:59Z"},{"alias_kind":"pith_short_12","alias_value":"RJFGPQSNBPCY","created_at":"2026-07-04T15:22:59Z"},{"alias_kind":"pith_short_16","alias_value":"RJFGPQSNBPCY4ZI7","created_at":"2026-07-04T15:22:59Z"},{"alias_kind":"pith_short_8","alias_value":"RJFGPQSN","created_at":"2026-07-04T15:22:59Z"}],"graph_snapshots":[{"event_id":"sha256:16ca1496ab66a123e2423bc00624a9c6f322a215765984ce4ada405b42ab60f3","target":"graph","created_at":"2026-07-04T15:22:59Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/astro-ph/0304001/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Mapping the expansion of the universe gives clues to the underlying physics causing the recently discovered acceleration of the expansion, and enables discrimination among cosmological models. We examine the utility of measuring the rate of expansion, H(z), at various epochs, both alone and in combination with distance measurements. Due to parameter degeneracies, it proves most useful as a complement to precision distance-redshift data. Using the baryon oscillations in the matter power spectrum as a standard rod allows determination of H(z)/\\sqrt{\\Omega_mh^2} free of most major systematics, an","authors_text":"Eric V. Linder (Berkeley Lab)","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-03-31T21:00:11Z","title":"Baryon Oscillations as a Cosmological Probe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0304001","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":"sha256:66ce7fe7d9a23769d9ca032ea84bbb686d0c62f3b35feb254db97d548a9b2ce8","target":"record","created_at":"2026-07-04T15:22:59Z","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":"aa908730cf113ae88135277246f0dc74b263e84b43f454bb8b7aab9e3026002c","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-03-31T21:00:11Z","title_canon_sha256":"79959cbe6fc81bc277189fbd841f1dff832ea44ac31b4855df143f601f2e89d8"},"schema_version":"1.0","source":{"id":"astro-ph/0304001","kind":"arxiv","version":1}},"canonical_sha256":"8a4a67c24d0bc58e651fa0e85c1607846ef4c9be21d7d759025786d2b356bb52","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a4a67c24d0bc58e651fa0e85c1607846ef4c9be21d7d759025786d2b356bb52","first_computed_at":"2026-07-04T15:22:59.308943Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:22:59.308943Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rl6CXQt44nVtoKM/4UQ6pdELOemgYGXqUHB650E5Ulc66Zz1eL2mMjhr/syoOdl/epgTOMkudRxefz5wpabiDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:22:59.309459Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0304001","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:66ce7fe7d9a23769d9ca032ea84bbb686d0c62f3b35feb254db97d548a9b2ce8","sha256:16ca1496ab66a123e2423bc00624a9c6f322a215765984ce4ada405b42ab60f3"],"state_sha256":"38703640c06af1b40096400f5c7c465df864957707a7d1120690f63160b34f42"}