{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:6N6ATXBF4GH4PYMVHC4EZXHIGW","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":"b68a7679373cd3573161edf6b4b0e97a4a0891dab1f493788b8936f80a5a8aa6","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-02T10:04:47Z","title_canon_sha256":"d1df5259d32777a58f05b55a4e8c8c96f8507f11d8ff6bd631dea773e6845389"},"schema_version":"1.0","source":{"id":"1606.00604","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.00604","created_at":"2026-05-18T01:07:16Z"},{"alias_kind":"arxiv_version","alias_value":"1606.00604v2","created_at":"2026-05-18T01:07:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.00604","created_at":"2026-05-18T01:07:16Z"},{"alias_kind":"pith_short_12","alias_value":"6N6ATXBF4GH4","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"6N6ATXBF4GH4PYMV","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"6N6ATXBF","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:b271b704f6552c09992674c3fd3b71a872a4124fa5ca72fffd892d0f9a039484","target":"graph","created_at":"2026-05-18T01:07:16Z","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":"The most metal-poor stars in the Milky Way witnessed the early phases of formation of the Galaxy, and have chemical compositions that are close to the pristine mixture from Big Bang nucleosynthesis, polluted by one or few supernovae. Only two dozen stars with ([Fe/H]< -4) are known, and they show a wide range of abundance patterns. It is therefore important to enlarge this sample. We present the first results of an effort to identify new extremely metal-poor stars in the Milky Way halo. Our targets have been selected from low-resolution spectra obtained as part of the Sloan Digital Sky Survey,","authors_text":"C. Allende Prieto, D. L. Lambert, D. S. Aguado, E. Fern\\'andez-Alvar, J. I. Gonz\\'alez Hern\\'andez, M. Shetrone, R. Carrera, R. Rebolo","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-02T10:04:47Z","title":"Follow-up observations of extremely metal-poor stars identified from SDSS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.00604","kind":"arxiv","version":2},"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":"sha256:1b84f39d553032c77044373b9565ff288d09176623abca46b894ec21bf39ed82","target":"record","created_at":"2026-05-18T01:07:16Z","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":"b68a7679373cd3573161edf6b4b0e97a4a0891dab1f493788b8936f80a5a8aa6","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-06-02T10:04:47Z","title_canon_sha256":"d1df5259d32777a58f05b55a4e8c8c96f8507f11d8ff6bd631dea773e6845389"},"schema_version":"1.0","source":{"id":"1606.00604","kind":"arxiv","version":2}},"canonical_sha256":"f37c09dc25e18fc7e19538b84cdce835b2477befcaede68543c943ef9b2b3964","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f37c09dc25e18fc7e19538b84cdce835b2477befcaede68543c943ef9b2b3964","first_computed_at":"2026-05-18T01:07:16.217072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:16.217072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XqeAr0rz/7fkK96FjPyYA/oNRm0h/m1698kPWWC3+6QXg0Ayk1ghd9hr5kZDldd23BghbwnsFW+CduVtczGLBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:16.217655Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.00604","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b84f39d553032c77044373b9565ff288d09176623abca46b894ec21bf39ed82","sha256:b271b704f6552c09992674c3fd3b71a872a4124fa5ca72fffd892d0f9a039484"],"state_sha256":"77ccae5b49c3cdd17ae8f9147afb7b64028f3030a2ca2da9d2591fdd58dc0933"}