{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HTERJLQOQREC62QWV523RLRM5D","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":"9c7278b4f0844b95ab5dc02ade3f8e5866bf4adf86bfbc6974d5d2be383dc1e9","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-06T02:21:38Z","title_canon_sha256":"e486a30e72e914daa67785c162bf39efb6876a11853fda5db0bdf645ac084c47"},"schema_version":"1.0","source":{"id":"1310.1527","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.1527","created_at":"2026-05-18T01:47:14Z"},{"alias_kind":"arxiv_version","alias_value":"1310.1527v3","created_at":"2026-05-18T01:47:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.1527","created_at":"2026-05-18T01:47:14Z"},{"alias_kind":"pith_short_12","alias_value":"HTERJLQOQREC","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HTERJLQOQREC62QW","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HTERJLQO","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:fa89a6618604f023ce0bac1775ddd82027f1170cda39e06ae01bb4b32df8555b","target":"graph","created_at":"2026-05-18T01:47:14Z","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":"From detailed abundance analysis of >100 Hamburg/ESO candidate extremely metal-poor (EMP) stars we find 45 with [Fe/H] < -3.0 dex. We identify a heretofore unidentified group: Ca-deficient stars, with sub-solar [Ca/Fe] ratios and the lowest neutron-capture abundances; the Ca-deficient group comprises ~ 10% of the sample, excluding Carbon stars. Our radial velocity distribution shows that the carbon-enhanced stars with no s-process enhancements, CEMP-no, and which do not show C2 bands are not preferentially binary systems. Ignoring Carbon stars, approximately 15% of our sample are strong (> 5 s","authors_text":"Andrew McWilliam, Dieter Reimers, Evan Kirby, Ian Thompson, Judith Cohen, Lutz Wisotzki, Norbert Christlieb, Stephen Shectman","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-06T02:21:38Z","title":"Normal and Outlying Populations of the Milky Way Stellar Halo at [Fe/H] < -2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.1527","kind":"arxiv","version":3},"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:f228698c2fd331786f097a4b207ca1bb2b0ebf4f14ec2947ab528d090ffdd57c","target":"record","created_at":"2026-05-18T01:47:14Z","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":"9c7278b4f0844b95ab5dc02ade3f8e5866bf4adf86bfbc6974d5d2be383dc1e9","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2013-10-06T02:21:38Z","title_canon_sha256":"e486a30e72e914daa67785c162bf39efb6876a11853fda5db0bdf645ac084c47"},"schema_version":"1.0","source":{"id":"1310.1527","kind":"arxiv","version":3}},"canonical_sha256":"3cc914ae0e84482f6a16af75b8ae2ce8ca8f44fe8bef90a4c7a0649a7b2b2609","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3cc914ae0e84482f6a16af75b8ae2ce8ca8f44fe8bef90a4c7a0649a7b2b2609","first_computed_at":"2026-05-18T01:47:14.787141Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:47:14.787141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HT7kzBDDTbjL7gImpA9WgFWDILtTP4JHI74lIo0ggYvrlXz3vv+a/qDC2h6B7sST+X+s/Ni4gmIHHE4bTkhtCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:47:14.787827Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.1527","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f228698c2fd331786f097a4b207ca1bb2b0ebf4f14ec2947ab528d090ffdd57c","sha256:fa89a6618604f023ce0bac1775ddd82027f1170cda39e06ae01bb4b32df8555b"],"state_sha256":"a71f5607f3b861f83d795cddf502a34537cd8f5a4a5792921f408f80b0ab85c0"}