{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:RNBHEAXWNP3YLLKWWBDY57WTRG","short_pith_number":"pith:RNBHEAXW","canonical_record":{"source":{"id":"1107.4372","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-07-21T20:21:00Z","cross_cats_sorted":[],"title_canon_sha256":"c640b262e480847c522e73f0dff1f714bf6a68f1db2a664c5f812f5b4c12cae4","abstract_canon_sha256":"d4b0fb9d99d986f8f37ae9205670b65f27fc62d17072ee070f9b0113234d7827"},"schema_version":"1.0"},"canonical_sha256":"8b427202f66bf785ad56b0478efed389a283266991564ceb278abde4e5af945e","source":{"kind":"arxiv","id":"1107.4372","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.4372","created_at":"2026-05-18T02:01:11Z"},{"alias_kind":"arxiv_version","alias_value":"1107.4372v2","created_at":"2026-05-18T02:01:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.4372","created_at":"2026-05-18T02:01:11Z"},{"alias_kind":"pith_short_12","alias_value":"RNBHEAXWNP3Y","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"RNBHEAXWNP3YLLKW","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"RNBHEAXW","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:RNBHEAXWNP3YLLKWWBDY57WTRG","target":"record","payload":{"canonical_record":{"source":{"id":"1107.4372","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-07-21T20:21:00Z","cross_cats_sorted":[],"title_canon_sha256":"c640b262e480847c522e73f0dff1f714bf6a68f1db2a664c5f812f5b4c12cae4","abstract_canon_sha256":"d4b0fb9d99d986f8f37ae9205670b65f27fc62d17072ee070f9b0113234d7827"},"schema_version":"1.0"},"canonical_sha256":"8b427202f66bf785ad56b0478efed389a283266991564ceb278abde4e5af945e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:11.740619Z","signature_b64":"h0cU1xK//b+ZpdSmfdvNoMwtpcmYkuDWE5ldN4v0XqLiqJXSVKwy7qNjO+6tyKFbU1125xi/HDVDykAXXNJuCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b427202f66bf785ad56b0478efed389a283266991564ceb278abde4e5af945e","last_reissued_at":"2026-05-18T02:01:11.739726Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:11.739726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1107.4372","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:01:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hx2eplv4XkLMFqzcMUSXfYq0prk2qe21sGvRMCtXHb6h61+7FW3BBHxNx4Bz+/3N+ciig+mM/qMcMgpO2zpgCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T08:48:39.982645Z"},"content_sha256":"31413f2f4cb7dc327a119a16380fc78720e18678007f432d8c88447d0073688a","schema_version":"1.0","event_id":"sha256:31413f2f4cb7dc327a119a16380fc78720e18678007f432d8c88447d0073688a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:RNBHEAXWNP3YLLKWWBDY57WTRG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Demographics of Broad-Line Quasars in the Mass-Luminosity Plane. I. Testing FWHM-Based Virial Black Hole Masses","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Brandon C. Kelly (CfA), Yue Shen","submitted_at":"2011-07-21T20:21:00Z","abstract_excerpt":"We jointly constrain the luminosity function (LF) and black hole mass function (BHMF) of broad-line quasars with forward Bayesian modeling in the quasar mass-luminosity plane, based on a homogeneous sample of ~ 58,000 SDSS DR7 quasars at z ~ 0.3-5. We take into account the selection effect of the sample flux limit; more importantly, we deal with the statistical scatter between true BH masses and FWHM-based single-epoch virial mass estimates, as well as potential luminosity-dependent biases of these mass estimates. The LF is tightly constrained in the regime sampled by SDSS, and makes reasonabl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.4372","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:01:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DvD23mfaPQUsevrxkfQRMXmLDBLcWRncoK+Uqv5Pcfqba1HV34q0IekVa2GzOM19koHn2RYwhxNFSOxJg4CtCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T08:48:39.982989Z"},"content_sha256":"71b08a475709d18e3bc2489cc9b44f3cdb6d63d68df0dcc5e039653f434f0683","schema_version":"1.0","event_id":"sha256:71b08a475709d18e3bc2489cc9b44f3cdb6d63d68df0dcc5e039653f434f0683"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RNBHEAXWNP3YLLKWWBDY57WTRG/bundle.json","state_url":"https://pith.science/pith/RNBHEAXWNP3YLLKWWBDY57WTRG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RNBHEAXWNP3YLLKWWBDY57WTRG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-04T08:48:39Z","links":{"resolver":"https://pith.science/pith/RNBHEAXWNP3YLLKWWBDY57WTRG","bundle":"https://pith.science/pith/RNBHEAXWNP3YLLKWWBDY57WTRG/bundle.json","state":"https://pith.science/pith/RNBHEAXWNP3YLLKWWBDY57WTRG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RNBHEAXWNP3YLLKWWBDY57WTRG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:RNBHEAXWNP3YLLKWWBDY57WTRG","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"d4b0fb9d99d986f8f37ae9205670b65f27fc62d17072ee070f9b0113234d7827","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-07-21T20:21:00Z","title_canon_sha256":"c640b262e480847c522e73f0dff1f714bf6a68f1db2a664c5f812f5b4c12cae4"},"schema_version":"1.0","source":{"id":"1107.4372","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1107.4372","created_at":"2026-05-18T02:01:11Z"},{"alias_kind":"arxiv_version","alias_value":"1107.4372v2","created_at":"2026-05-18T02:01:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1107.4372","created_at":"2026-05-18T02:01:11Z"},{"alias_kind":"pith_short_12","alias_value":"RNBHEAXWNP3Y","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"RNBHEAXWNP3YLLKW","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"RNBHEAXW","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:71b08a475709d18e3bc2489cc9b44f3cdb6d63d68df0dcc5e039653f434f0683","target":"graph","created_at":"2026-05-18T02:01:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We jointly constrain the luminosity function (LF) and black hole mass function (BHMF) of broad-line quasars with forward Bayesian modeling in the quasar mass-luminosity plane, based on a homogeneous sample of ~ 58,000 SDSS DR7 quasars at z ~ 0.3-5. We take into account the selection effect of the sample flux limit; more importantly, we deal with the statistical scatter between true BH masses and FWHM-based single-epoch virial mass estimates, as well as potential luminosity-dependent biases of these mass estimates. The LF is tightly constrained in the regime sampled by SDSS, and makes reasonabl","authors_text":"Brandon C. Kelly (CfA), Yue Shen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-07-21T20:21:00Z","title":"The Demographics of Broad-Line Quasars in the Mass-Luminosity Plane. I. Testing FWHM-Based Virial Black Hole Masses"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.4372","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:31413f2f4cb7dc327a119a16380fc78720e18678007f432d8c88447d0073688a","target":"record","created_at":"2026-05-18T02:01:11Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"d4b0fb9d99d986f8f37ae9205670b65f27fc62d17072ee070f9b0113234d7827","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-07-21T20:21:00Z","title_canon_sha256":"c640b262e480847c522e73f0dff1f714bf6a68f1db2a664c5f812f5b4c12cae4"},"schema_version":"1.0","source":{"id":"1107.4372","kind":"arxiv","version":2}},"canonical_sha256":"8b427202f66bf785ad56b0478efed389a283266991564ceb278abde4e5af945e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b427202f66bf785ad56b0478efed389a283266991564ceb278abde4e5af945e","first_computed_at":"2026-05-18T02:01:11.739726Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:11.739726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h0cU1xK//b+ZpdSmfdvNoMwtpcmYkuDWE5ldN4v0XqLiqJXSVKwy7qNjO+6tyKFbU1125xi/HDVDykAXXNJuCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:11.740619Z","signed_message":"canonical_sha256_bytes"},"source_id":"1107.4372","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:31413f2f4cb7dc327a119a16380fc78720e18678007f432d8c88447d0073688a","sha256:71b08a475709d18e3bc2489cc9b44f3cdb6d63d68df0dcc5e039653f434f0683"],"state_sha256":"f680709f93e6206f46fa8b0f8d850ea993de661488caa08c470e968f39326e41"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"reJuyT4cKRtoBIScYKjt2hjKmrbWjpOGFStlAFRW8D6+Cr+FKPzSu7Y3CFIC9l8J7xumVtqtTiIu2hSBBedzBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T08:48:39.984961Z","bundle_sha256":"fd1c5dbc9ef670b72436ba1c51c8628f5756499e993fc8eea9945e11e865d009"}}