{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:M2EDDEFX2ZGWWCYMT4AS7QKQCP","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":"519b94d89c84b949a876de266c0b92b28e4bc29d0e11949a2d43bd783a50d224","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-11-08T19:32:52Z","title_canon_sha256":"b8c4357b1f3928dd06d0b120fc69dce5ffb3d315a6da83886968733e562ddaac"},"schema_version":"1.0","source":{"id":"astro-ph/0211168","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0211168","created_at":"2026-05-18T04:14:55Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0211168v1","created_at":"2026-05-18T04:14:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0211168","created_at":"2026-05-18T04:14:55Z"},{"alias_kind":"pith_short_12","alias_value":"M2EDDEFX2ZGW","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"M2EDDEFX2ZGWWCYM","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"M2EDDEFX","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:b2f23cd0917c92eb538986e07ef112acaaef9cc6161dce84545e0b46d01f933a","target":"graph","created_at":"2026-05-18T04:14:55Z","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 have used UVES on VLT-UT2 to take spectra of 15 individual red giant stars in the centers of four nearby dwarf spheroidal galaxies: Sculptor, Fornax, Carina and Leo I. We measure the abundance variations of numerous elements in these low mass stars with a range of ages (1-15Gyr old). This means that we can effectively measure the chemical evolution of these galaxies WITH TIME. Our results show a significant spread in metallicity with age, but an overall trend consistent with what might be expected from a closed (or perhaps leaky) box chemical evolution scenario over the last 10-15Gyr. We no","authors_text":"A. Kaufer & T. Szeifert, Eline Tolstoy, F. Primas, K.A. Venn, M. Shetrone, V. Hill","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-11-08T19:32:52Z","title":"VLT/UVES Abundances in Four Nearby Dwarf Spheroidal Galaxies: II. Implications for Understanding Galaxy Evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0211168","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":"sha256:77c8848307778fd91a8a165075b222036944ed950e67101c3ddc3259c7394d40","target":"record","created_at":"2026-05-18T04:14:55Z","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":"519b94d89c84b949a876de266c0b92b28e4bc29d0e11949a2d43bd783a50d224","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-11-08T19:32:52Z","title_canon_sha256":"b8c4357b1f3928dd06d0b120fc69dce5ffb3d315a6da83886968733e562ddaac"},"schema_version":"1.0","source":{"id":"astro-ph/0211168","kind":"arxiv","version":1}},"canonical_sha256":"66883190b7d64d6b0b0c9f012fc15013c6adce390a3a21507cd8a2a3d844bb41","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"66883190b7d64d6b0b0c9f012fc15013c6adce390a3a21507cd8a2a3d844bb41","first_computed_at":"2026-05-18T04:14:55.475090Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:14:55.475090Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FcQIOzO2ghsrgsBUW0yn/vyACk+aWw/Ki3HI6MORA8lXcX29ovJrMlS/lTPttj01RY001mmHKrneVc14fJ10Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:14:55.475685Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0211168","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77c8848307778fd91a8a165075b222036944ed950e67101c3ddc3259c7394d40","sha256:b2f23cd0917c92eb538986e07ef112acaaef9cc6161dce84545e0b46d01f933a"],"state_sha256":"2e12cf5fce6ee82d593e7efe441521cf51fc611d2fa24c68018495964b5a58c4"}