{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:AUR3ZGQLQCVQKL4UO2TT72G5BC","short_pith_number":"pith:AUR3ZGQL","schema_version":"1.0","canonical_sha256":"0523bc9a0b80ab052f9476a73fe8dd089b0fb10dfa51e02532189f6dcf25c710","source":{"kind":"arxiv","id":"2209.07797","version":2},"attestation_state":"computed","paper":{"title":"The Obscured Fraction of Quasars at Cosmic Noon","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bovornpratch Vijarnwannaluk, Janek Pflugradt, Malte Schramm, Marcin Sawicki, Masayuki Akiyama, Stephen Gwyn, Yoshihiro Ueda, Yoshiki Matsuoka, Yoshiki Toba","submitted_at":"2022-09-16T08:53:35Z","abstract_excerpt":"Statistical studies of X-ray selected Active Galactic Nuclei (AGN) indicate that the fraction of obscured AGN increases with increasing redshift, and the results suggest that a significant part of the accretion growth occurs behind obscuring material in the early universe. We investigate the obscured fraction of highly accreting X-ray AGN at around the peak epoch of supermassive black hole growth utilizing the wide and deep X-ray and optical/IR imaging datasets. A unique sample of luminous X-ray selected AGNs above $z>2$ was constructed by matching the XMM-SERVS X-ray point-source catalog with"},"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":"2209.07797","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-09-16T08:53:35Z","cross_cats_sorted":[],"title_canon_sha256":"68f17217bf1d894af357392bae916499346ee5d97528f90eed34439141847e08","abstract_canon_sha256":"c6829110bb55323944bdd8053b1ff02ffceedd8449b7a18e1f1c47c048fa0119"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:26:49.576776Z","signature_b64":"1fkBrpb3+h4OV3PmroaTqHVbCQjOSK2EB0Iq4GHB3bGVfI44TBHvJ/Udq72i49rzZWMSCPH/dXM9dCyFAQrMBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0523bc9a0b80ab052f9476a73fe8dd089b0fb10dfa51e02532189f6dcf25c710","last_reissued_at":"2026-07-05T05:26:49.576377Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:26:49.576377Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Obscured Fraction of Quasars at Cosmic Noon","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bovornpratch Vijarnwannaluk, Janek Pflugradt, Malte Schramm, Marcin Sawicki, Masayuki Akiyama, Stephen Gwyn, Yoshihiro Ueda, Yoshiki Matsuoka, Yoshiki Toba","submitted_at":"2022-09-16T08:53:35Z","abstract_excerpt":"Statistical studies of X-ray selected Active Galactic Nuclei (AGN) indicate that the fraction of obscured AGN increases with increasing redshift, and the results suggest that a significant part of the accretion growth occurs behind obscuring material in the early universe. We investigate the obscured fraction of highly accreting X-ray AGN at around the peak epoch of supermassive black hole growth utilizing the wide and deep X-ray and optical/IR imaging datasets. A unique sample of luminous X-ray selected AGNs above $z>2$ was constructed by matching the XMM-SERVS X-ray point-source catalog with"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2209.07797","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2209.07797/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":"2209.07797","created_at":"2026-07-05T05:26:49.576434+00:00"},{"alias_kind":"arxiv_version","alias_value":"2209.07797v2","created_at":"2026-07-05T05:26:49.576434+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2209.07797","created_at":"2026-07-05T05:26:49.576434+00:00"},{"alias_kind":"pith_short_12","alias_value":"AUR3ZGQLQCVQ","created_at":"2026-07-05T05:26:49.576434+00:00"},{"alias_kind":"pith_short_16","alias_value":"AUR3ZGQLQCVQKL4U","created_at":"2026-07-05T05:26:49.576434+00:00"},{"alias_kind":"pith_short_8","alias_value":"AUR3ZGQL","created_at":"2026-07-05T05:26:49.576434+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.12076","citing_title":"X-ray luminosity function of Compton-thick AGN in the early Universe (z > 3). Robustness and biases of the CTK population","ref_index":75,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC","json":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC.json","graph_json":"https://pith.science/api/pith-number/AUR3ZGQLQCVQKL4UO2TT72G5BC/graph.json","events_json":"https://pith.science/api/pith-number/AUR3ZGQLQCVQKL4UO2TT72G5BC/events.json","paper":"https://pith.science/paper/AUR3ZGQL"},"agent_actions":{"view_html":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC","download_json":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC.json","view_paper":"https://pith.science/paper/AUR3ZGQL","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2209.07797&json=true","fetch_graph":"https://pith.science/api/pith-number/AUR3ZGQLQCVQKL4UO2TT72G5BC/graph.json","fetch_events":"https://pith.science/api/pith-number/AUR3ZGQLQCVQKL4UO2TT72G5BC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC/action/storage_attestation","attest_author":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC/action/author_attestation","sign_citation":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC/action/citation_signature","submit_replication":"https://pith.science/pith/AUR3ZGQLQCVQKL4UO2TT72G5BC/action/replication_record"}},"created_at":"2026-07-05T05:26:49.576434+00:00","updated_at":"2026-07-05T05:26:49.576434+00:00"}