{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:H2BEBYNW3E3SCMPWYYHYMDKYTV","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":"7a14657d603ecb490b5c020ee03e10675e34993dfbe4a1e7a4d57ca66962b02f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-03-24T12:54:19Z","title_canon_sha256":"78320a5272e642b501d0dc7df75946d9fda8c27ce76ce0b90501be2960b3cfca"},"schema_version":"1.0","source":{"id":"1103.4755","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.4755","created_at":"2026-05-18T02:02:47Z"},{"alias_kind":"arxiv_version","alias_value":"1103.4755v1","created_at":"2026-05-18T02:02:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.4755","created_at":"2026-05-18T02:02:47Z"},{"alias_kind":"pith_short_12","alias_value":"H2BEBYNW3E3S","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"H2BEBYNW3E3SCMPW","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"H2BEBYNW","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:639007fa3be8bd3ed1c58da4a3e6dbdc2dabfb5c243dcb2b0b28697d5c97b0a2","target":"graph","created_at":"2026-05-18T02:02:47Z","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":"A previous study (Nissen & Schuster 2010) of 94 dwarf stars with -1.6 < [Fe/H] < -0.4 has revealed the existence of two distinct halo populations with a systematic difference in [alpha/Fe] at a given metallicity. In continuation of that work, abundances of Mn, Cu, Zn, Y, and Ba are determined for the same sample of stars. Equivalent widths of atomic lines are measured from high resolution VLT/UVES and NOT/FIES spectra and used to derive precise abundance ratios from an LTE analysis based on MARCS model atmospheres. Systematic differences between the `high-alpha' and `low-alpha' halo population","authors_text":"Poul E. Nissen, William J. Schuster","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-03-24T12:54:19Z","title":"Two distinct halo populations in the solar neighborhood. II. Evidence from stellar abundances of Mn, Cu, Zn, Y, and Ba"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.4755","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":"sha256:8e9719377ca688c26deb42c9dcfc55ff056aebddd5268a1f35b132317b8d78a9","target":"record","created_at":"2026-05-18T02:02:47Z","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":"7a14657d603ecb490b5c020ee03e10675e34993dfbe4a1e7a4d57ca66962b02f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-03-24T12:54:19Z","title_canon_sha256":"78320a5272e642b501d0dc7df75946d9fda8c27ce76ce0b90501be2960b3cfca"},"schema_version":"1.0","source":{"id":"1103.4755","kind":"arxiv","version":1}},"canonical_sha256":"3e8240e1b6d9372131f6c60f860d589d45faecc7a137ad76ea64ba012cf9d0aa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3e8240e1b6d9372131f6c60f860d589d45faecc7a137ad76ea64ba012cf9d0aa","first_computed_at":"2026-05-18T02:02:47.377389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:47.377389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PGVKoE6X/ENN8GplQeAe3441oLzR9WlCkJ143X98AdAdBwIpE6gYBVxUqtHxw8rh7r+KTRgzh0hz0rknVYdJAg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:47.378098Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.4755","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e9719377ca688c26deb42c9dcfc55ff056aebddd5268a1f35b132317b8d78a9","sha256:639007fa3be8bd3ed1c58da4a3e6dbdc2dabfb5c243dcb2b0b28697d5c97b0a2"],"state_sha256":"f14dc509db24b0c9a1b40a3d849af5889abe82d2cdb120792f5dd772b827f278"}