{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:ADB5MCEQXANVRB7GISC2B2JAAG","short_pith_number":"pith:ADB5MCEQ","schema_version":"1.0","canonical_sha256":"00c3d60890b81b5887e64485a0e92001970e7c4c6e0311bd89082d4db601fca1","source":{"kind":"arxiv","id":"1111.3909","version":2},"attestation_state":"computed","paper":{"title":"The environment of weak emission-line quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"2), Marek Nikolajuk (1, Poland), Roland Walter (1) ((1) ISDC - University of Geneva, Switzerland (2) University of Bialystok","submitted_at":"2011-11-16T19:15:32Z","abstract_excerpt":"The nature of weak emission-line quasars (WLQs) is probed by comparing the Baldwin effect (BEff) in WLQs and normal quasars (QSOs). We selected 81 high-redshift (z>2.2) and 2 intermediate-redshift (z=1.66 and 1.89) WLQs. Their rest-frame equivalent widths (EWs) of the C IV emission-line and their Eddington ratio were obtained from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7) Quasar Catalogue or from Diamond-Stanic et al. We compare the parameters of WLQs with these of 81 normal quasars from Bright Quasar Survey (BQS) and 155 radio-quiet and radio-intermediate quasars detected by SDSS"},"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":"1111.3909","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-11-16T19:15:32Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"a4c7f3d3625367b31ef7d4d03eecaa59640488f8a74e9f4c097d74885f8c5f96","abstract_canon_sha256":"733cdf3e783835740876de97b2956af27457f08913785b533f397129ee75a546"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:06:09.274240Z","signature_b64":"JjNx1td9M8Tyk+F8CLoOF+w0jn4fQmz/ng/rJrfun26XfSq/PQ6JRBLIUdO7KplJSRBtIHpDdM8gRty8QDyMBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"00c3d60890b81b5887e64485a0e92001970e7c4c6e0311bd89082d4db601fca1","last_reissued_at":"2026-05-18T04:06:09.273799Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:06:09.273799Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The environment of weak emission-line quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"2), Marek Nikolajuk (1, Poland), Roland Walter (1) ((1) ISDC - University of Geneva, Switzerland (2) University of Bialystok","submitted_at":"2011-11-16T19:15:32Z","abstract_excerpt":"The nature of weak emission-line quasars (WLQs) is probed by comparing the Baldwin effect (BEff) in WLQs and normal quasars (QSOs). We selected 81 high-redshift (z>2.2) and 2 intermediate-redshift (z=1.66 and 1.89) WLQs. Their rest-frame equivalent widths (EWs) of the C IV emission-line and their Eddington ratio were obtained from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7) Quasar Catalogue or from Diamond-Stanic et al. We compare the parameters of WLQs with these of 81 normal quasars from Bright Quasar Survey (BQS) and 155 radio-quiet and radio-intermediate quasars detected by SDSS"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.3909","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":"1111.3909","created_at":"2026-05-18T04:06:09.273870+00:00"},{"alias_kind":"arxiv_version","alias_value":"1111.3909v2","created_at":"2026-05-18T04:06:09.273870+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.3909","created_at":"2026-05-18T04:06:09.273870+00:00"},{"alias_kind":"pith_short_12","alias_value":"ADB5MCEQXANV","created_at":"2026-05-18T12:26:24.575870+00:00"},{"alias_kind":"pith_short_16","alias_value":"ADB5MCEQXANVRB7G","created_at":"2026-05-18T12:26:24.575870+00:00"},{"alias_kind":"pith_short_8","alias_value":"ADB5MCEQ","created_at":"2026-05-18T12:26:24.575870+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/ADB5MCEQXANVRB7GISC2B2JAAG","json":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG.json","graph_json":"https://pith.science/api/pith-number/ADB5MCEQXANVRB7GISC2B2JAAG/graph.json","events_json":"https://pith.science/api/pith-number/ADB5MCEQXANVRB7GISC2B2JAAG/events.json","paper":"https://pith.science/paper/ADB5MCEQ"},"agent_actions":{"view_html":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG","download_json":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG.json","view_paper":"https://pith.science/paper/ADB5MCEQ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1111.3909&json=true","fetch_graph":"https://pith.science/api/pith-number/ADB5MCEQXANVRB7GISC2B2JAAG/graph.json","fetch_events":"https://pith.science/api/pith-number/ADB5MCEQXANVRB7GISC2B2JAAG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG/action/storage_attestation","attest_author":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG/action/author_attestation","sign_citation":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG/action/citation_signature","submit_replication":"https://pith.science/pith/ADB5MCEQXANVRB7GISC2B2JAAG/action/replication_record"}},"created_at":"2026-05-18T04:06:09.273870+00:00","updated_at":"2026-05-18T04:06:09.273870+00:00"}