{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:M4IVJ3YYJTZZZMRCC6UXJ7EOX5","short_pith_number":"pith:M4IVJ3YY","schema_version":"1.0","canonical_sha256":"671154ef184cf39cb22217a974fc8ebf5c96e32cfc1a53a0c76483dcc17afb9c","source":{"kind":"arxiv","id":"0909.3044","version":1},"attestation_state":"computed","paper":{"title":"XMM-Newton Observations of a Complete Sample of Optically Selected Type 2 Seyfert Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew A. Ptak (JHU), Ann Hornschemeier (NASA Goddard Space Flight Center), Christy Tremonti (MPIA), Lucimara Martins (NAT - Universidade Cruzeiro do Sul), Paule Sonnentrucker (JHU), Stephanie M. LaMassa, Timothy M. Heckman","submitted_at":"2009-09-16T15:31:02Z","abstract_excerpt":"(abridged)The majority of Active Galactic Nuclei (AGN) suffer from significant obscuration by surrounding dust and gas. X-ray surveys in the 2-10 keV band will miss the most heavily-obscured AGN in which the absorbing column density exceeds $\\sim10^{24}$cm$^{-2}$ (the Compton-thick AGN). It is therefore vital to know the fraction of AGN that are missed in such X-rays surveys and to determine if these AGN represent some distinct population in terms of the fundamental properties of AGN and/or their host galaxies. In this paper we present the analysis of \\textit{XMM-Newton} X-ray data for a compl"},"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":"0909.3044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-09-16T15:31:02Z","cross_cats_sorted":[],"title_canon_sha256":"1ac8652802bf5da1b64f1e20e78bdecacb2a25637b80398cbf2a885e7db04469","abstract_canon_sha256":"9cb0938187a13f443497098151c37238f94e74fc84f61e2292804b4c1fd9eae7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:29.853711Z","signature_b64":"BJ+nvDhDaaSNJvOjGTNP06nInNmOiHFWa+DPLHohrqB4oQKWS+w8JuqMuaSGpYHZpXWLSylEFR+HHdq12SSMDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"671154ef184cf39cb22217a974fc8ebf5c96e32cfc1a53a0c76483dcc17afb9c","last_reissued_at":"2026-05-18T02:34:29.853176Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:29.853176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"XMM-Newton Observations of a Complete Sample of Optically Selected Type 2 Seyfert Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew A. Ptak (JHU), Ann Hornschemeier (NASA Goddard Space Flight Center), Christy Tremonti (MPIA), Lucimara Martins (NAT - Universidade Cruzeiro do Sul), Paule Sonnentrucker (JHU), Stephanie M. LaMassa, Timothy M. Heckman","submitted_at":"2009-09-16T15:31:02Z","abstract_excerpt":"(abridged)The majority of Active Galactic Nuclei (AGN) suffer from significant obscuration by surrounding dust and gas. X-ray surveys in the 2-10 keV band will miss the most heavily-obscured AGN in which the absorbing column density exceeds $\\sim10^{24}$cm$^{-2}$ (the Compton-thick AGN). It is therefore vital to know the fraction of AGN that are missed in such X-rays surveys and to determine if these AGN represent some distinct population in terms of the fundamental properties of AGN and/or their host galaxies. In this paper we present the analysis of \\textit{XMM-Newton} X-ray data for a compl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0909.3044","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":"0909.3044","created_at":"2026-05-18T02:34:29.853233+00:00"},{"alias_kind":"arxiv_version","alias_value":"0909.3044v1","created_at":"2026-05-18T02:34:29.853233+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0909.3044","created_at":"2026-05-18T02:34:29.853233+00:00"},{"alias_kind":"pith_short_12","alias_value":"M4IVJ3YYJTZZ","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"M4IVJ3YYJTZZZMRC","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"M4IVJ3YY","created_at":"2026-05-18T12:26:00.592388+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/M4IVJ3YYJTZZZMRCC6UXJ7EOX5","json":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5.json","graph_json":"https://pith.science/api/pith-number/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/graph.json","events_json":"https://pith.science/api/pith-number/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/events.json","paper":"https://pith.science/paper/M4IVJ3YY"},"agent_actions":{"view_html":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5","download_json":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5.json","view_paper":"https://pith.science/paper/M4IVJ3YY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0909.3044&json=true","fetch_graph":"https://pith.science/api/pith-number/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/graph.json","fetch_events":"https://pith.science/api/pith-number/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/action/timestamp_anchor","attest_storage":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/action/storage_attestation","attest_author":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/action/author_attestation","sign_citation":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/action/citation_signature","submit_replication":"https://pith.science/pith/M4IVJ3YYJTZZZMRCC6UXJ7EOX5/action/replication_record"}},"created_at":"2026-05-18T02:34:29.853233+00:00","updated_at":"2026-05-18T02:34:29.853233+00:00"}