{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:Q7DLJJAVTSWJIMK6QHMEFCIVB2","short_pith_number":"pith:Q7DLJJAV","schema_version":"1.0","canonical_sha256":"87c6b4a4159cac94315e81d84289150ea1d1d500ef0f616c5ff592ef027d18cf","source":{"kind":"arxiv","id":"1807.07899","version":2},"attestation_state":"computed","paper":{"title":"The role of galaxies and AGN in reionizing the IGM - II: metal-tracing the faint sources of reionization at $5\\lesssim z\\lesssim6$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Astronomy, Koki Kakiichi (1), Richard S. Ellis (1) ((1) Department of Physics, Romain A. Meyer (1), Sarah E. I. Bosman (1), University College London)","submitted_at":"2018-07-20T15:36:45Z","abstract_excerpt":"We present a new method to study the contribution of faint sources to the UV background using the 1D correlation of metal absorbers with the intergalactic medium (IGM) transmission in a Quasi Stellar Object (QSO) sightline. We take advantage of a sample of $25$ high signal-to-noise ratio QSO spectra to retrieve $150$ triply-ionised carbon (\\cfour) absorbers at $4.5\\lesssim z\\lesssim 6.2$, of which $37$ systems whose expected H{~\\small I} absorption lie in the Lyman-$\\alpha$ forest. We derive improved constraints on the cosmic density of \\cfour \\,at $4.3< z < 6.2$ and infer from abundance-match"},"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":"1807.07899","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-07-20T15:36:45Z","cross_cats_sorted":[],"title_canon_sha256":"8c6efdc52743bfae95fc71151820a4a70811222dcefb43c0ddb45456a1eb6d3e","abstract_canon_sha256":"288651c0142b8046f5fb8a1b401ae24f6c1c50a4b1e5ec7bff8122b997686433"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:29.001026Z","signature_b64":"fKJxhMT2FJfEEWWMGYFbc+H13ya+JPDLMrmNReeHszM9hcHHa9ZeFTxI9jUt30VBz5oR2MNiH1Et7RGr5CDFBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"87c6b4a4159cac94315e81d84289150ea1d1d500ef0f616c5ff592ef027d18cf","last_reissued_at":"2026-05-18T00:01:29.000534Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:29.000534Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The role of galaxies and AGN in reionizing the IGM - II: metal-tracing the faint sources of reionization at $5\\lesssim z\\lesssim6$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Astronomy, Koki Kakiichi (1), Richard S. Ellis (1) ((1) Department of Physics, Romain A. Meyer (1), Sarah E. I. Bosman (1), University College London)","submitted_at":"2018-07-20T15:36:45Z","abstract_excerpt":"We present a new method to study the contribution of faint sources to the UV background using the 1D correlation of metal absorbers with the intergalactic medium (IGM) transmission in a Quasi Stellar Object (QSO) sightline. We take advantage of a sample of $25$ high signal-to-noise ratio QSO spectra to retrieve $150$ triply-ionised carbon (\\cfour) absorbers at $4.5\\lesssim z\\lesssim 6.2$, of which $37$ systems whose expected H{~\\small I} absorption lie in the Lyman-$\\alpha$ forest. We derive improved constraints on the cosmic density of \\cfour \\,at $4.3< z < 6.2$ and infer from abundance-match"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.07899","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":"1807.07899","created_at":"2026-05-18T00:01:29.000620+00:00"},{"alias_kind":"arxiv_version","alias_value":"1807.07899v2","created_at":"2026-05-18T00:01:29.000620+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.07899","created_at":"2026-05-18T00:01:29.000620+00:00"},{"alias_kind":"pith_short_12","alias_value":"Q7DLJJAVTSWJ","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_16","alias_value":"Q7DLJJAVTSWJIMK6","created_at":"2026-05-18T12:32:46.962924+00:00"},{"alias_kind":"pith_short_8","alias_value":"Q7DLJJAV","created_at":"2026-05-18T12:32:46.962924+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2608.10066","citing_title":"The Last Crossing in Excursion-Set Theory of Cosmic Reionization","ref_index":18,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2","json":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2.json","graph_json":"https://pith.science/api/pith-number/Q7DLJJAVTSWJIMK6QHMEFCIVB2/graph.json","events_json":"https://pith.science/api/pith-number/Q7DLJJAVTSWJIMK6QHMEFCIVB2/events.json","paper":"https://pith.science/paper/Q7DLJJAV"},"agent_actions":{"view_html":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2","download_json":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2.json","view_paper":"https://pith.science/paper/Q7DLJJAV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1807.07899&json=true","fetch_graph":"https://pith.science/api/pith-number/Q7DLJJAVTSWJIMK6QHMEFCIVB2/graph.json","fetch_events":"https://pith.science/api/pith-number/Q7DLJJAVTSWJIMK6QHMEFCIVB2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2/action/storage_attestation","attest_author":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2/action/author_attestation","sign_citation":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2/action/citation_signature","submit_replication":"https://pith.science/pith/Q7DLJJAVTSWJIMK6QHMEFCIVB2/action/replication_record"}},"created_at":"2026-05-18T00:01:29.000620+00:00","updated_at":"2026-05-18T00:01:29.000620+00:00"}