{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:AWPEYVAWCDQNTWMYILEPKHWGV4","short_pith_number":"pith:AWPEYVAW","schema_version":"1.0","canonical_sha256":"059e4c541610e0d9d99842c8f51ec6af19de69afb25842509c1e303c923b6a81","source":{"kind":"arxiv","id":"astro-ph/0309817","version":2},"attestation_state":"computed","paper":{"title":"Astrophysical constraints on hypothetical variability of fundamental constants","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Russia), Sergei A. Levshakov (Ioffe Institute, St. Petersburg","submitted_at":"2003-09-30T10:16:24Z","abstract_excerpt":"(Abridged) Many-multiplet (MM) method applied to three inhomogeneous samples of Keck/HIRES quasar absorption spectra gives a shift in the value of the fine-structure constant of Delta alpha/alpha = (-5.4+/-1.2) 10^{-6} in the redshift range 0.2 < z < 3.7 (Murphy et al. 2003).The 1sigma error is, however, much too small and cannot be maintained by current observations of quasars. We present a modified MM method to set an upper limit on Delta alpha/alpha from a homogeneous sample of FeII lines identified in the up-to-date best quality VLT/UVES spectrum of HE 0515-4414. Our result is Delta alpha/"},"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/0309817","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-09-30T10:16:24Z","cross_cats_sorted":[],"title_canon_sha256":"ab2d67fce2499e856875eb98585d73b241158876548c3ba93f95689b53e6204e","abstract_canon_sha256":"3a8c6f89f6efaeb05bb1951efec2dd0a57e9cd6f208f982234b2b6f4baae1908"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:00.710221Z","signature_b64":"tSr+7d2iHknc5Vpy7nM1IwQ7q2cDqUjJqCWNmpv/mn6o9M0PsbF8TemNeH72f3A7zQqGT4YdcJBPl8mbXhmpBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"059e4c541610e0d9d99842c8f51ec6af19de69afb25842509c1e303c923b6a81","last_reissued_at":"2026-05-18T00:37:00.709681Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:00.709681Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Astrophysical constraints on hypothetical variability of fundamental constants","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Russia), Sergei A. Levshakov (Ioffe Institute, St. Petersburg","submitted_at":"2003-09-30T10:16:24Z","abstract_excerpt":"(Abridged) Many-multiplet (MM) method applied to three inhomogeneous samples of Keck/HIRES quasar absorption spectra gives a shift in the value of the fine-structure constant of Delta alpha/alpha = (-5.4+/-1.2) 10^{-6} in the redshift range 0.2 < z < 3.7 (Murphy et al. 2003).The 1sigma error is, however, much too small and cannot be maintained by current observations of quasars. We present a modified MM method to set an upper limit on Delta alpha/alpha from a homogeneous sample of FeII lines identified in the up-to-date best quality VLT/UVES spectrum of HE 0515-4414. Our result is Delta alpha/"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0309817","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":"astro-ph/0309817","created_at":"2026-05-18T00:37:00.709770+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0309817v2","created_at":"2026-05-18T00:37:00.709770+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0309817","created_at":"2026-05-18T00:37:00.709770+00:00"},{"alias_kind":"pith_short_12","alias_value":"AWPEYVAWCDQN","created_at":"2026-05-18T12:25:51.375804+00:00"},{"alias_kind":"pith_short_16","alias_value":"AWPEYVAWCDQNTWMY","created_at":"2026-05-18T12:25:51.375804+00:00"},{"alias_kind":"pith_short_8","alias_value":"AWPEYVAW","created_at":"2026-05-18T12:25:51.375804+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/AWPEYVAWCDQNTWMYILEPKHWGV4","json":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4.json","graph_json":"https://pith.science/api/pith-number/AWPEYVAWCDQNTWMYILEPKHWGV4/graph.json","events_json":"https://pith.science/api/pith-number/AWPEYVAWCDQNTWMYILEPKHWGV4/events.json","paper":"https://pith.science/paper/AWPEYVAW"},"agent_actions":{"view_html":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4","download_json":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4.json","view_paper":"https://pith.science/paper/AWPEYVAW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0309817&json=true","fetch_graph":"https://pith.science/api/pith-number/AWPEYVAWCDQNTWMYILEPKHWGV4/graph.json","fetch_events":"https://pith.science/api/pith-number/AWPEYVAWCDQNTWMYILEPKHWGV4/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4/action/storage_attestation","attest_author":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4/action/author_attestation","sign_citation":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4/action/citation_signature","submit_replication":"https://pith.science/pith/AWPEYVAWCDQNTWMYILEPKHWGV4/action/replication_record"}},"created_at":"2026-05-18T00:37:00.709770+00:00","updated_at":"2026-05-18T00:37:00.709770+00:00"}