{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:LBUUQQAOPHWGNI3Y2BAKHPKEL3","short_pith_number":"pith:LBUUQQAO","schema_version":"1.0","canonical_sha256":"586948400e79ec66a378d040a3bd445ed5d69c55970315aec645a305cde80fd0","source":{"kind":"arxiv","id":"1904.01110","version":1},"attestation_state":"computed","paper":{"title":"Measurements of effective optical depth in the Ly$\\alpha$ forest from the BOSS DR12 Quasar sample","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Donald P. Schneider, H\\'elion du Mas des Bourboux, Julian Bautista, Kyle Dawson, Vikrant Kamble","submitted_at":"2019-04-01T21:07:49Z","abstract_excerpt":"We measure the effective optical depth in the Lyman-alpha (Ly$\\alpha$) forest using 40,035 quasar spectra from the Twelfth Data Release (DR12) of the Baryon Oscillation Spectroscopic Survey (BOSS) of SDSS-IV. A rigorous selection based on spectral index and the equivalent width of the C IV emission line is applied to choose seven uniform samples with minimal intrinsic variations across redshifts. Modeling the redshift evolution of the effective optical depth with a power-law, $\\tau_\\mathrm{eff}=\\tau_0 (1 + z)^\\gamma$ produces $\\tau_0=(5.54 \\pm 0.64)\\times 10^{-3}$ and $\\gamma=3.182 \\pm 0.074$."},"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":"1904.01110","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2019-04-01T21:07:49Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"e648eda788fb7583d217c8748d09f06e0c36a4d2d1738aa30a82987679d311cd","abstract_canon_sha256":"e9af94f90571e97bb48c07a08c66dce5a2fb2defa387a5269a9c02e9b708d1d0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:53:33.536244Z","signature_b64":"tfR0qB8J/NpamLs4knJfieQKTZEoivJFEQGEZRg9tA8KV4r9znWnMPgVOzE6DSYD3jh9txHq4ynksyKJcjzgAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"586948400e79ec66a378d040a3bd445ed5d69c55970315aec645a305cde80fd0","last_reissued_at":"2026-07-05T00:53:33.535847Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:53:33.535847Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurements of effective optical depth in the Ly$\\alpha$ forest from the BOSS DR12 Quasar sample","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"Donald P. Schneider, H\\'elion du Mas des Bourboux, Julian Bautista, Kyle Dawson, Vikrant Kamble","submitted_at":"2019-04-01T21:07:49Z","abstract_excerpt":"We measure the effective optical depth in the Lyman-alpha (Ly$\\alpha$) forest using 40,035 quasar spectra from the Twelfth Data Release (DR12) of the Baryon Oscillation Spectroscopic Survey (BOSS) of SDSS-IV. A rigorous selection based on spectral index and the equivalent width of the C IV emission line is applied to choose seven uniform samples with minimal intrinsic variations across redshifts. Modeling the redshift evolution of the effective optical depth with a power-law, $\\tau_\\mathrm{eff}=\\tau_0 (1 + z)^\\gamma$ produces $\\tau_0=(5.54 \\pm 0.64)\\times 10^{-3}$ and $\\gamma=3.182 \\pm 0.074$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.01110","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1904.01110/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"1904.01110","created_at":"2026-07-05T00:53:33.535902+00:00"},{"alias_kind":"arxiv_version","alias_value":"1904.01110v1","created_at":"2026-07-05T00:53:33.535902+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.01110","created_at":"2026-07-05T00:53:33.535902+00:00"},{"alias_kind":"pith_short_12","alias_value":"LBUUQQAOPHWG","created_at":"2026-07-05T00:53:33.535902+00:00"},{"alias_kind":"pith_short_16","alias_value":"LBUUQQAOPHWGNI3Y","created_at":"2026-07-05T00:53:33.535902+00:00"},{"alias_kind":"pith_short_8","alias_value":"LBUUQQAO","created_at":"2026-07-05T00:53:33.535902+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2404.03001","citing_title":"DESI 2024 IV: Baryon Acoustic Oscillations from the Lyman Alpha Forest","ref_index":48,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3","json":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3.json","graph_json":"https://pith.science/api/pith-number/LBUUQQAOPHWGNI3Y2BAKHPKEL3/graph.json","events_json":"https://pith.science/api/pith-number/LBUUQQAOPHWGNI3Y2BAKHPKEL3/events.json","paper":"https://pith.science/paper/LBUUQQAO"},"agent_actions":{"view_html":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3","download_json":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3.json","view_paper":"https://pith.science/paper/LBUUQQAO","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1904.01110&json=true","fetch_graph":"https://pith.science/api/pith-number/LBUUQQAOPHWGNI3Y2BAKHPKEL3/graph.json","fetch_events":"https://pith.science/api/pith-number/LBUUQQAOPHWGNI3Y2BAKHPKEL3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3/action/storage_attestation","attest_author":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3/action/author_attestation","sign_citation":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3/action/citation_signature","submit_replication":"https://pith.science/pith/LBUUQQAOPHWGNI3Y2BAKHPKEL3/action/replication_record"}},"created_at":"2026-07-05T00:53:33.535902+00:00","updated_at":"2026-07-05T00:53:33.535902+00:00"}