{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:BRN75I6REB6LAJPXQOXPUIBTPR","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":"1f8f2fbdbc4c13a52f6aa91cc04f44f4ba572185a34f2dea91d4de7915bdce78","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-01T10:48:01Z","title_canon_sha256":"4ab187567c029a7993fdfa7235cb4fdc9389e796364c0f6acee4cd9e9ebb9df5"},"schema_version":"1.0","source":{"id":"2607.00764","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.00764","created_at":"2026-07-02T01:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"2607.00764v1","created_at":"2026-07-02T01:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.00764","created_at":"2026-07-02T01:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"BRN75I6REB6L","created_at":"2026-07-02T01:17:54Z"},{"alias_kind":"pith_short_16","alias_value":"BRN75I6REB6LAJPX","created_at":"2026-07-02T01:17:54Z"},{"alias_kind":"pith_short_8","alias_value":"BRN75I6R","created_at":"2026-07-02T01:17:54Z"}],"graph_snapshots":[{"event_id":"sha256:e661ee42842f8aebba2b22846bc88ff4458b2b0a45a05ea79c9af03b5cb7d928","target":"graph","created_at":"2026-07-02T01:17:54Z","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/2607.00764/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We estimate the age of the Universe using the Xiang & Rix sample of 247,103 Milky Way stars with high-resolution spectroscopy from LAMOST DR7 and $Gaia$ eDR3 parallaxes. Stellar ages were estimated using YY isochrones up to 20 Gyr. To remove stars with unusually high and precise ages, we require old stars to be metal-poor and $\\alpha$-enriched. We also require consistency between YY ages and those obtained with FLAME based only on $Gaia$ data. Our final sample of 155,600 stars within 5 kpc provides consistent cosmic age estimates using several techniques of increasing rigour. Our main results ","authors_text":"Harry Desmond, Indranil Banik, Stephen Cookson, Thenujaya Kudakolawa Kaluarachchige","cross_cats":["astro-ph.GA","astro-ph.SR"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-01T10:48:01Z","title":"The age of the Universe from a large sample of the oldest Galactic stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.00764","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":"sha256:41ceca2b9c0f1541d288f76b7dcba33e1595d340e8febc175237f39cfbae32ef","target":"record","created_at":"2026-07-02T01:17:54Z","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":"1f8f2fbdbc4c13a52f6aa91cc04f44f4ba572185a34f2dea91d4de7915bdce78","cross_cats_sorted":["astro-ph.GA","astro-ph.SR"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.CO","submitted_at":"2026-07-01T10:48:01Z","title_canon_sha256":"4ab187567c029a7993fdfa7235cb4fdc9389e796364c0f6acee4cd9e9ebb9df5"},"schema_version":"1.0","source":{"id":"2607.00764","kind":"arxiv","version":1}},"canonical_sha256":"0c5bfea3d1207cb025f783aefa20337c622e6484390e53154a774f0aecb7d747","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0c5bfea3d1207cb025f783aefa20337c622e6484390e53154a774f0aecb7d747","first_computed_at":"2026-07-02T01:17:54.758206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-02T01:17:54.758206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"egShQKjheJ+OWlnUHGbk28EkOuexOmcj3Dnxw5g7je25hdmUoYB6weBGbUJsuz9VOprAlrGe6fzQLPE8H8AHDQ==","signature_status":"signed_v1","signed_at":"2026-07-02T01:17:54.758639Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.00764","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41ceca2b9c0f1541d288f76b7dcba33e1595d340e8febc175237f39cfbae32ef","sha256:e661ee42842f8aebba2b22846bc88ff4458b2b0a45a05ea79c9af03b5cb7d928"],"state_sha256":"bb2a57dda872e782899f33fc22b090655e9cee3a8d34a31422ff62c749903e6a"}