{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:SZ57OLNZM7CXN7NB7BVUV2KDGC","short_pith_number":"pith:SZ57OLNZ","schema_version":"1.0","canonical_sha256":"967bf72db967c576fda1f86b4ae94330a51ab0141ecd3e0eef25b9c48254bf2b","source":{"kind":"arxiv","id":"0907.3491","version":1},"attestation_state":"computed","paper":{"title":"Host Galaxies of Luminous Type 2 Quasars at z ~ 0.5","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jenny E. Greene, Julian H. Krolik, Michael A. Strauss, Nadia L. Zakamska, Timothy M. Heckman, Xin Liu","submitted_at":"2009-07-21T02:05:12Z","abstract_excerpt":"We present deep Gemini GMOS optical spectroscopy of nine luminous quasars at redshifts z ~ 0.5, drawn from the SDSS type 2 quasar sample. Our targets were selected to have high intrinsic luminosities (M_V < -26 mag) as indicated by the [O III] 5007 A emission-line luminosity (L_[O III]). Our sample has a median black hole mass of ~ 10^8.8 M_sun inferred assuming the local M_BH-sigma_* relation and a median Eddington ratio of ~ 0.7, using stellar velocity dispersions sigma_* measured from the G band. We estimate the contamination of the stellar continuum from scattered quasar light based on the"},"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":"0907.3491","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-07-21T02:05:12Z","cross_cats_sorted":[],"title_canon_sha256":"0964734cf444631e507ebad3d2cdd2e362505905983902a000f933e773e79e6c","abstract_canon_sha256":"1a207a0bbaad75d343fc86fabcbcc89b234cc34f76fbbbfe17887f5199c3acb9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:12:55.349602Z","signature_b64":"pfT/S5gVPnMbT/ZkAduCvWaSPxNuKPY2GJ7nRXASHVji3XYjC3+s3bvH1tI9bqnsqnDA4A28zTxzcAzD2HEcAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"967bf72db967c576fda1f86b4ae94330a51ab0141ecd3e0eef25b9c48254bf2b","last_reissued_at":"2026-05-18T02:12:55.348889Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:12:55.348889Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Host Galaxies of Luminous Type 2 Quasars at z ~ 0.5","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Jenny E. Greene, Julian H. Krolik, Michael A. Strauss, Nadia L. Zakamska, Timothy M. Heckman, Xin Liu","submitted_at":"2009-07-21T02:05:12Z","abstract_excerpt":"We present deep Gemini GMOS optical spectroscopy of nine luminous quasars at redshifts z ~ 0.5, drawn from the SDSS type 2 quasar sample. Our targets were selected to have high intrinsic luminosities (M_V < -26 mag) as indicated by the [O III] 5007 A emission-line luminosity (L_[O III]). Our sample has a median black hole mass of ~ 10^8.8 M_sun inferred assuming the local M_BH-sigma_* relation and a median Eddington ratio of ~ 0.7, using stellar velocity dispersions sigma_* measured from the G band. We estimate the contamination of the stellar continuum from scattered quasar light based on the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.3491","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":"0907.3491","created_at":"2026-05-18T02:12:55.349005+00:00"},{"alias_kind":"arxiv_version","alias_value":"0907.3491v1","created_at":"2026-05-18T02:12:55.349005+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.3491","created_at":"2026-05-18T02:12:55.349005+00:00"},{"alias_kind":"pith_short_12","alias_value":"SZ57OLNZM7CX","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_16","alias_value":"SZ57OLNZM7CXN7NB","created_at":"2026-05-18T12:26:01.383474+00:00"},{"alias_kind":"pith_short_8","alias_value":"SZ57OLNZ","created_at":"2026-05-18T12:26:01.383474+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/SZ57OLNZM7CXN7NB7BVUV2KDGC","json":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC.json","graph_json":"https://pith.science/api/pith-number/SZ57OLNZM7CXN7NB7BVUV2KDGC/graph.json","events_json":"https://pith.science/api/pith-number/SZ57OLNZM7CXN7NB7BVUV2KDGC/events.json","paper":"https://pith.science/paper/SZ57OLNZ"},"agent_actions":{"view_html":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC","download_json":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC.json","view_paper":"https://pith.science/paper/SZ57OLNZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0907.3491&json=true","fetch_graph":"https://pith.science/api/pith-number/SZ57OLNZM7CXN7NB7BVUV2KDGC/graph.json","fetch_events":"https://pith.science/api/pith-number/SZ57OLNZM7CXN7NB7BVUV2KDGC/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC/action/storage_attestation","attest_author":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC/action/author_attestation","sign_citation":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC/action/citation_signature","submit_replication":"https://pith.science/pith/SZ57OLNZM7CXN7NB7BVUV2KDGC/action/replication_record"}},"created_at":"2026-05-18T02:12:55.349005+00:00","updated_at":"2026-05-18T02:12:55.349005+00:00"}