{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:O5HIFGIBX34ONWLFUDSJQ3OKP4","short_pith_number":"pith:O5HIFGIB","schema_version":"1.0","canonical_sha256":"774e829901bef8e6d965a0e4986dca7f3f83d9d44ab8756f7dc161b098877bcc","source":{"kind":"arxiv","id":"astro-ph/0302263","version":1},"attestation_state":"computed","paper":{"title":"Probing the star formation epoch with Wilkinson Microwave Anisotropy Probe (WMAP) data and high-redshift QSOs","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jun'ichi Yokoyama","submitted_at":"2003-02-13T12:27:14Z","abstract_excerpt":"Using the values of the cosmological parameters obtained from Wilkinson Microwave Anisotropy Probe (WMAP) and the cosmological chemical clock observed by high-redshift quasars, it is shown that star formation should have started by the redshift $z_F > 9.5$, and that $z_F$ is sensitive only to $\\omegamz h^2$ in flat $\\Lambda$CDM cosmology."},"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":"astro-ph/0302263","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-02-13T12:27:14Z","cross_cats_sorted":[],"title_canon_sha256":"52b19d1dc1e5d20bd1c59bc2c5fa6cb67ef12b690264f52e922a54557ff07637","abstract_canon_sha256":"a7d7c737e6c93eaad0dde641d031e6b698c1860ee6284f13963644f7f6a37311"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:39.377958Z","signature_b64":"rPPG5IYqP9TY/GfjEWIQEWRBaLE8xaCqthoSP1QBxObXLn3wZUpQSXBGD91aHIVOyRWX75oLSYwxv+62WETkCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"774e829901bef8e6d965a0e4986dca7f3f83d9d44ab8756f7dc161b098877bcc","last_reissued_at":"2026-05-18T01:40:39.377332Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:39.377332Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Probing the star formation epoch with Wilkinson Microwave Anisotropy Probe (WMAP) data and high-redshift QSOs","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Jun'ichi Yokoyama","submitted_at":"2003-02-13T12:27:14Z","abstract_excerpt":"Using the values of the cosmological parameters obtained from Wilkinson Microwave Anisotropy Probe (WMAP) and the cosmological chemical clock observed by high-redshift quasars, it is shown that star formation should have started by the redshift $z_F > 9.5$, and that $z_F$ is sensitive only to $\\omegamz h^2$ in flat $\\Lambda$CDM cosmology."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0302263","kind":"arxiv","version":1},"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":"astro-ph/0302263","created_at":"2026-05-18T01:40:39.377442+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0302263v1","created_at":"2026-05-18T01:40:39.377442+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0302263","created_at":"2026-05-18T01:40:39.377442+00:00"},{"alias_kind":"pith_short_12","alias_value":"O5HIFGIBX34O","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_16","alias_value":"O5HIFGIBX34ONWLF","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_8","alias_value":"O5HIFGIB","created_at":"2026-05-18T12:25:52.051335+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/O5HIFGIBX34ONWLFUDSJQ3OKP4","json":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4.json","graph_json":"https://pith.science/api/pith-number/O5HIFGIBX34ONWLFUDSJQ3OKP4/graph.json","events_json":"https://pith.science/api/pith-number/O5HIFGIBX34ONWLFUDSJQ3OKP4/events.json","paper":"https://pith.science/paper/O5HIFGIB"},"agent_actions":{"view_html":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4","download_json":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4.json","view_paper":"https://pith.science/paper/O5HIFGIB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0302263&json=true","fetch_graph":"https://pith.science/api/pith-number/O5HIFGIBX34ONWLFUDSJQ3OKP4/graph.json","fetch_events":"https://pith.science/api/pith-number/O5HIFGIBX34ONWLFUDSJQ3OKP4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4/action/storage_attestation","attest_author":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4/action/author_attestation","sign_citation":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4/action/citation_signature","submit_replication":"https://pith.science/pith/O5HIFGIBX34ONWLFUDSJQ3OKP4/action/replication_record"}},"created_at":"2026-05-18T01:40:39.377442+00:00","updated_at":"2026-05-18T01:40:39.377442+00:00"}