{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:N5AJAYPSDZOONHJGHIJOAURTW5","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":"c928db40c3961a89593df6bc69d4fa29f5ebf09897af1465db0583f34a93ab32","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T21:00:10Z","title_canon_sha256":"10702344a1d2b4ddbed48dad1b3990d959b96e38f352829143616467d85bbad4"},"schema_version":"1.0","source":{"id":"1412.5176","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.5176","created_at":"2026-05-18T01:41:18Z"},{"alias_kind":"arxiv_version","alias_value":"1412.5176v1","created_at":"2026-05-18T01:41:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.5176","created_at":"2026-05-18T01:41:18Z"},{"alias_kind":"pith_short_12","alias_value":"N5AJAYPSDZOO","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_16","alias_value":"N5AJAYPSDZOONHJG","created_at":"2026-05-18T12:28:41Z"},{"alias_kind":"pith_short_8","alias_value":"N5AJAYPS","created_at":"2026-05-18T12:28:41Z"}],"graph_snapshots":[{"event_id":"sha256:ca070dba47a1e3ad0a15280481806217f17aee00ad3de8770edb0cf572035140","target":"graph","created_at":"2026-05-18T01:41:18Z","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 present a homogeneous chemical abundance analysis of five of the most metal-poor stars in the Sculptor dwarf spheroidal galaxy. We analyze new and archival high resolution spectroscopy from Magellan/MIKE and VLT/UVES and determine stellar parameters and abundances in a consistent way for each star. Two of the stars in our sample, at [Fe/H] = -3.5 and [Fe/H] = -3.8, are new discoveries from our Ca K survey of Sculptor, while the other three were known in the literature. We confirm that Scl 07-50 is the lowest metallicity star identified in an external galaxy, at [Fe/H] = -4.1. The two most m","authors_text":"Anna Frebel (MIT), Heather R. Jacobson, Ian B. Thompson (Carnegie Observatories), Joshua D. Simon (Carnegie Observatories), Joshua J. Adams (ASML), Stephen A. Shectman (Carnegie Observatories)","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T21:00:10Z","title":"Chemical Signatures of the First Supernovae in the Sculptor Dwarf Spheroidal Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.5176","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":"sha256:62b9965641f14e19951d0121770340a734c77254c6afcc2dee53523c0009221f","target":"record","created_at":"2026-05-18T01:41:18Z","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":"c928db40c3961a89593df6bc69d4fa29f5ebf09897af1465db0583f34a93ab32","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-12-16T21:00:10Z","title_canon_sha256":"10702344a1d2b4ddbed48dad1b3990d959b96e38f352829143616467d85bbad4"},"schema_version":"1.0","source":{"id":"1412.5176","kind":"arxiv","version":1}},"canonical_sha256":"6f409061f21e5ce69d263a12e05233b75ef942f931b2348aa1f2c6656b6f2930","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6f409061f21e5ce69d263a12e05233b75ef942f931b2348aa1f2c6656b6f2930","first_computed_at":"2026-05-18T01:41:18.696655Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:18.696655Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7vVlRaahtk55Cm0ksLyFAT8Y4y6cSDM424bcIaAXtdRBBg9eQvnGRW7iq3vj1SeefLWK01ExoBFptsBnJiawBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:18.697263Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.5176","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62b9965641f14e19951d0121770340a734c77254c6afcc2dee53523c0009221f","sha256:ca070dba47a1e3ad0a15280481806217f17aee00ad3de8770edb0cf572035140"],"state_sha256":"cf4a906416bc1b117fe67062e5b4cb1cba829cd8180bef97d2946bfa4f54b9cf"}