{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:TNYMH5ATDOVKHAY4HWASVKSNBU","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":"a80f2a12a0585cf7e95775401fc130f7fff13aa82ae265f526f6907f36e4a615","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-25T01:53:17Z","title_canon_sha256":"5f175a61622fd96c60455df399bd51a068095ecafa80961202d4172e1ab3e19c"},"schema_version":"1.0","source":{"id":"1705.09020","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.09020","created_at":"2026-05-18T00:39:34Z"},{"alias_kind":"arxiv_version","alias_value":"1705.09020v1","created_at":"2026-05-18T00:39:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.09020","created_at":"2026-05-18T00:39:34Z"},{"alias_kind":"pith_short_12","alias_value":"TNYMH5ATDOVK","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_16","alias_value":"TNYMH5ATDOVKHAY4","created_at":"2026-05-18T12:31:46Z"},{"alias_kind":"pith_short_8","alias_value":"TNYMH5AT","created_at":"2026-05-18T12:31:46Z"}],"graph_snapshots":[{"event_id":"sha256:3d03e5cf35b0038f2a82d5d5ce9c2f441969fd7cb7236f8e1698e038239223aa","target":"graph","created_at":"2026-05-18T00:39:34Z","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 investigate the color-magnitude diagram (CMD) of the Carina dwarf spheroidal galaxy using data of Stetson et al. (2011) and synthetic CMDs based on isochrones of Dotter et al. (2008), in terms of the parameters [Fe/H], age, and [alpha/Fe], for the cases when (i) [alpha/Fe] is held constant and (ii) [alpha/Fe] is varied. The data are well described by four basic epochs of star formation, having [Fe/H] = -1.85, -1.5, -1.2, and ~-1.15 and ages ~13, 7, ~3.5, and ~1.5 Gyr, respectively (for [alpha/Fe] = 0.1 (constant [alpha/Fe]) and [alpha/Fe] = 0.2, 0.1, -0.2, -0.2 (variable [alpha/Fe])), with ","authors_text":"Aaron Dotter, David Yong, Gerard Gilmore, John E. Norris, Kim A. Venn, Luca Casagrande","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-25T01:53:17Z","title":"The Populations of Carina. I. Decoding the Color--Magnitude Diagram"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.09020","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":"sha256:38c02b9623e848cf0a460d4f6216d879cbd9cd6be8f73a46a3e2962793cac9e5","target":"record","created_at":"2026-05-18T00:39:34Z","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":"a80f2a12a0585cf7e95775401fc130f7fff13aa82ae265f526f6907f36e4a615","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-25T01:53:17Z","title_canon_sha256":"5f175a61622fd96c60455df399bd51a068095ecafa80961202d4172e1ab3e19c"},"schema_version":"1.0","source":{"id":"1705.09020","kind":"arxiv","version":1}},"canonical_sha256":"9b70c3f4131baaa3831c3d812aaa4d0d06ddf0b4f9899fc62c710163ec936420","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9b70c3f4131baaa3831c3d812aaa4d0d06ddf0b4f9899fc62c710163ec936420","first_computed_at":"2026-05-18T00:39:34.734561Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:39:34.734561Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QgN5Sn7ww+pvb5fiIVEVxs0VfTv86w4iDJTgbj/6sB7kHj0lfZCUBwOVj+x/CamrhOqfkTi3CHEDj+r0h79zAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:39:34.735218Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.09020","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:38c02b9623e848cf0a460d4f6216d879cbd9cd6be8f73a46a3e2962793cac9e5","sha256:3d03e5cf35b0038f2a82d5d5ce9c2f441969fd7cb7236f8e1698e038239223aa"],"state_sha256":"6810e4773628098a6abcb5e677adb38b9bc9494daaf645356b736210231bc735"}