{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:75R4RA6LYR2PTK73YT5ZP5L75V","short_pith_number":"pith:75R4RA6L","schema_version":"1.0","canonical_sha256":"ff63c883cbc474f9abfbc4fb97f57fed45f73356f1445a0800c28b6a8bbfd26e","source":{"kind":"arxiv","id":"1804.09852","version":1},"attestation_state":"computed","paper":{"title":"The Black Hole Masses and Eddington Ratios of Type 2 Quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Kavli Institute for Astronomy, 3) ((1) Department of Physics, (3) Department of Astronomy, Astrophysics, Hebei Normal University, Luis C. Ho (2, Minzhi Kong (1), Peking University, Peking University), School of Physics","submitted_at":"2018-04-26T01:47:10Z","abstract_excerpt":"Type 2 quasars are an important constituent of active galaxies, possibly representing the evolutionary precursors of traditionally studied type 1 quasars. We characterize the black hole mass ($M_{\\rm BH}$) and Eddington ratio ($L_{\\rm bol}/L_{\\rm Edd}$) for 669 type 2 quasars selected from the Sloan Digital Sky Survey, using black hole masses estimated from the $M_{\\rm BH}-\\sigma_{\\ast}$ relation and bolometric corrections scaled from the extinction-corrected $ [\\rm O~{\\scriptsize III}]~ \\lambda 5007$ luminosity. When stellar velocity dispersions cannot be measured directly from the spectra, w"},"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":"1804.09852","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-04-26T01:47:10Z","cross_cats_sorted":[],"title_canon_sha256":"5c3189be2777b924207a2a06694d2add73e75ba9bfe5cac0eb7ce2a7fb564961","abstract_canon_sha256":"0c1ee08533143fe00a7698dce20d0270762037184e148802d3cd76c1528dd579"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:25.987243Z","signature_b64":"z3ueD+5JdWQqThYJIh0/H8ax80g4sp92DdxnH6ZN8l5q0afGhUlhVWSxRQyz/QK0pDT0pEU1A48qErri6A8KCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff63c883cbc474f9abfbc4fb97f57fed45f73356f1445a0800c28b6a8bbfd26e","last_reissued_at":"2026-05-18T00:13:25.986549Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:25.986549Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Black Hole Masses and Eddington Ratios of Type 2 Quasars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Kavli Institute for Astronomy, 3) ((1) Department of Physics, (3) Department of Astronomy, Astrophysics, Hebei Normal University, Luis C. Ho (2, Minzhi Kong (1), Peking University, Peking University), School of Physics","submitted_at":"2018-04-26T01:47:10Z","abstract_excerpt":"Type 2 quasars are an important constituent of active galaxies, possibly representing the evolutionary precursors of traditionally studied type 1 quasars. We characterize the black hole mass ($M_{\\rm BH}$) and Eddington ratio ($L_{\\rm bol}/L_{\\rm Edd}$) for 669 type 2 quasars selected from the Sloan Digital Sky Survey, using black hole masses estimated from the $M_{\\rm BH}-\\sigma_{\\ast}$ relation and bolometric corrections scaled from the extinction-corrected $ [\\rm O~{\\scriptsize III}]~ \\lambda 5007$ luminosity. When stellar velocity dispersions cannot be measured directly from the spectra, w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.09852","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":"1804.09852","created_at":"2026-05-18T00:13:25.986638+00:00"},{"alias_kind":"arxiv_version","alias_value":"1804.09852v1","created_at":"2026-05-18T00:13:25.986638+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.09852","created_at":"2026-05-18T00:13:25.986638+00:00"},{"alias_kind":"pith_short_12","alias_value":"75R4RA6LYR2P","created_at":"2026-05-18T12:32:11.075285+00:00"},{"alias_kind":"pith_short_16","alias_value":"75R4RA6LYR2PTK73","created_at":"2026-05-18T12:32:11.075285+00:00"},{"alias_kind":"pith_short_8","alias_value":"75R4RA6L","created_at":"2026-05-18T12:32:11.075285+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/75R4RA6LYR2PTK73YT5ZP5L75V","json":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V.json","graph_json":"https://pith.science/api/pith-number/75R4RA6LYR2PTK73YT5ZP5L75V/graph.json","events_json":"https://pith.science/api/pith-number/75R4RA6LYR2PTK73YT5ZP5L75V/events.json","paper":"https://pith.science/paper/75R4RA6L"},"agent_actions":{"view_html":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V","download_json":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V.json","view_paper":"https://pith.science/paper/75R4RA6L","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1804.09852&json=true","fetch_graph":"https://pith.science/api/pith-number/75R4RA6LYR2PTK73YT5ZP5L75V/graph.json","fetch_events":"https://pith.science/api/pith-number/75R4RA6LYR2PTK73YT5ZP5L75V/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V/action/timestamp_anchor","attest_storage":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V/action/storage_attestation","attest_author":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V/action/author_attestation","sign_citation":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V/action/citation_signature","submit_replication":"https://pith.science/pith/75R4RA6LYR2PTK73YT5ZP5L75V/action/replication_record"}},"created_at":"2026-05-18T00:13:25.986638+00:00","updated_at":"2026-05-18T00:13:25.986638+00:00"}