{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:5WBYF2BIZAL7CJWCZMETPCGOD4","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":"029d8b640bb448950654062a18c754ef28aa967aab78f292a1200dfd78a72f4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-13T18:16:23Z","title_canon_sha256":"891a96a4ffeb50b1afeb65072ef5382e8b13d4fd9dfc5355cfac0821ae00a2ee"},"schema_version":"1.0","source":{"id":"1302.3180","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.3180","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"arxiv_version","alias_value":"1302.3180v1","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.3180","created_at":"2026-05-18T03:33:48Z"},{"alias_kind":"pith_short_12","alias_value":"5WBYF2BIZAL7","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_16","alias_value":"5WBYF2BIZAL7CJWC","created_at":"2026-05-18T12:27:34Z"},{"alias_kind":"pith_short_8","alias_value":"5WBYF2BI","created_at":"2026-05-18T12:27:34Z"}],"graph_snapshots":[{"event_id":"sha256:d3a6aa48526d713181d0073dfc9385b9723feb2458147cc45f0df64a8e085cad","target":"graph","created_at":"2026-05-18T03:33:48Z","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":"HD 140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the HR diagram where absolute magnitude is most sensitive to stellar age. Because it is bright, nearby, unreddened, and has a well-determined chemical composition, this star avoids most of the issues involved in age determinations for globular clusters. Using the Fine Guidance Sensors on the Hubble Space Telescope, we have measured a trigonometric parallax of 17.15 +/- 0.14 mas for HD 140283, with an error one-fifth of that determined by the Hipparcos mission. Employing modern t","authors_text":"2), (2) Space Telescope Science Institute, (3) University of Victoria, (4) CHARA Array, (5) NOAO), Dianne Harmer (5) ((1) Pennsylvania State University, Don A. VandenBerg (3), Edmund P. Nelan (2), Gail H. Schaefer (4), Georgia State University, Howard E. Bond (1","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-13T18:16:23Z","title":"HD 140283: A Star in the Solar Neighborhood that Formed Shortly After the Big Bang"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.3180","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:d046366dc2186ff7219b23b9895399ea036fc5e3a6e650895f2473c012d243fa","target":"record","created_at":"2026-05-18T03:33:48Z","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":"029d8b640bb448950654062a18c754ef28aa967aab78f292a1200dfd78a72f4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-02-13T18:16:23Z","title_canon_sha256":"891a96a4ffeb50b1afeb65072ef5382e8b13d4fd9dfc5355cfac0821ae00a2ee"},"schema_version":"1.0","source":{"id":"1302.3180","kind":"arxiv","version":1}},"canonical_sha256":"ed8382e828c817f126c2cb093788ce1f3a22fdb288ce52f7dc26f2d991733be9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed8382e828c817f126c2cb093788ce1f3a22fdb288ce52f7dc26f2d991733be9","first_computed_at":"2026-05-18T03:33:48.497830Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:33:48.497830Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yAi3IOnd27SdvEqfksUYFV6jBgdHcJu2nji5ap6//WT8rdi6O+7mqBM8HedvOvHk/tltolVBRGuoGZJAXI93Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:33:48.498399Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.3180","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d046366dc2186ff7219b23b9895399ea036fc5e3a6e650895f2473c012d243fa","sha256:d3a6aa48526d713181d0073dfc9385b9723feb2458147cc45f0df64a8e085cad"],"state_sha256":"751b2b2d464731d1433bf1ea0560410b17138d21e10351db4a63d3d646171d4d"}