{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:JUOP4QCITDHM3DJNJR5CP5XEJ4","short_pith_number":"pith:JUOP4QCI","schema_version":"1.0","canonical_sha256":"4d1cfe404898cecd8d2d4c7a27f6e44f0f03989b91c133e9c96ce00dbc1131cc","source":{"kind":"arxiv","id":"1705.09233","version":2},"attestation_state":"computed","paper":{"title":"WHT follow-up observations of extremely metal-poor stars identified from SDSS and LAMOST","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. Allende Prieto, D. S. Aguado, J. I. Gonz\\'alez Hern\\'andez, R. Rebolo","submitted_at":"2017-05-25T15:41:59Z","abstract_excerpt":"We have identified several tens of extremely metal-poor star candidates from SDSS and LAMOST, which we follow-up with the 4.2m WHT telescope to confirm their metallicity.We follow a robust two-step methodology. We first analyze the SDSS and LAMOST spectra. A first set of stellar parameters is derived from these spectra with the FERRE code, taking advantage of the continuum shape to determine the atmospheric parameters, in particular, the effective temperature. Second, we select interesting targets for follow-up observations, some of them with very low-quality SDSS or LAMOST data. We then obtai"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1705.09233","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2017-05-25T15:41:59Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"d3d38c63fa1bc30467c1d33d2034918b748e3df1f4aaedbeda130f0d1225a625","abstract_canon_sha256":"e37a99ea2d2478706139f0fbcc15a982cb89dbc8a9249a2fbf46cec7b2e46761"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:35:58.746443Z","signature_b64":"yvm7d0ROzKRNJyLp/l+86KyHp8rPD/WoK4RuuWSxWsoC2jQRkS1x1X/jXpAZQrbkzZs46RE3AWyEyfR9HQkXBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4d1cfe404898cecd8d2d4c7a27f6e44f0f03989b91c133e9c96ce00dbc1131cc","last_reissued_at":"2026-05-18T00:35:58.745922Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:35:58.745922Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"WHT follow-up observations of extremely metal-poor stars identified from SDSS and LAMOST","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"C. Allende Prieto, D. S. Aguado, J. I. Gonz\\'alez Hern\\'andez, R. Rebolo","submitted_at":"2017-05-25T15:41:59Z","abstract_excerpt":"We have identified several tens of extremely metal-poor star candidates from SDSS and LAMOST, which we follow-up with the 4.2m WHT telescope to confirm their metallicity.We follow a robust two-step methodology. We first analyze the SDSS and LAMOST spectra. A first set of stellar parameters is derived from these spectra with the FERRE code, taking advantage of the continuum shape to determine the atmospheric parameters, in particular, the effective temperature. Second, we select interesting targets for follow-up observations, some of them with very low-quality SDSS or LAMOST data. We then obtai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.09233","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1705.09233","created_at":"2026-05-18T00:35:58.746001+00:00"},{"alias_kind":"arxiv_version","alias_value":"1705.09233v2","created_at":"2026-05-18T00:35:58.746001+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.09233","created_at":"2026-05-18T00:35:58.746001+00:00"},{"alias_kind":"pith_short_12","alias_value":"JUOP4QCITDHM","created_at":"2026-05-18T12:31:24.725408+00:00"},{"alias_kind":"pith_short_16","alias_value":"JUOP4QCITDHM3DJN","created_at":"2026-05-18T12:31:24.725408+00:00"},{"alias_kind":"pith_short_8","alias_value":"JUOP4QCI","created_at":"2026-05-18T12:31:24.725408+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4","json":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4.json","graph_json":"https://pith.science/api/pith-number/JUOP4QCITDHM3DJNJR5CP5XEJ4/graph.json","events_json":"https://pith.science/api/pith-number/JUOP4QCITDHM3DJNJR5CP5XEJ4/events.json","paper":"https://pith.science/paper/JUOP4QCI"},"agent_actions":{"view_html":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4","download_json":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4.json","view_paper":"https://pith.science/paper/JUOP4QCI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1705.09233&json=true","fetch_graph":"https://pith.science/api/pith-number/JUOP4QCITDHM3DJNJR5CP5XEJ4/graph.json","fetch_events":"https://pith.science/api/pith-number/JUOP4QCITDHM3DJNJR5CP5XEJ4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4/action/storage_attestation","attest_author":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4/action/author_attestation","sign_citation":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4/action/citation_signature","submit_replication":"https://pith.science/pith/JUOP4QCITDHM3DJNJR5CP5XEJ4/action/replication_record"}},"created_at":"2026-05-18T00:35:58.746001+00:00","updated_at":"2026-05-18T00:35:58.746001+00:00"}