{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:N7VI2FCGJIY6LGGFOTW4AKTJZR","short_pith_number":"pith:N7VI2FCG","schema_version":"1.0","canonical_sha256":"6fea8d14464a31e598c574edc02a69cc748ad14b4f65b8adab06f20e8ef6174e","source":{"kind":"arxiv","id":"2502.03684","version":1},"attestation_state":"computed","paper":{"title":"Iron-corrected Single-epoch Black Hole Masses of DESI Quasars at low redshift","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aaron Meisner, Adam Myers, Andrew Lambert, Axel de la Macorra, Benjamin Alan Weaver, Claire Poppett, David Brooks, David Sprayberry, Enrique Gazta\\~naga, Eusebio Sanchez, Francisco Prada, Graziano Rossi, Gregory Tarl\\'e, Hee-Jong Seo, Hu Zou, Jessica Nicole Aguilar, John Moustakas, Laurent Le Guillou, Linhua Jiang, Ma{\\l}gorzata Siudek, Marc Manera, Martin Landriau, Michael Schubnell, Paul Martini, Peter Doel, Ramon Miquel, Satya Gontcho A Gontcho, Shengxiu Sun, Stephanie Juneau, Steven Ahlen, Theodore Kisner, Todd Claybaugh, Wei-Jian Guo, Zhiwei Pan","submitted_at":"2025-02-06T00:12:04Z","abstract_excerpt":"We present a study on the possible overestimation of single-epoch supermassive black hole (SMBH) masses in previous works, based on more than 55,000 type 1 quasars at $0.25 < z < 0.8$ from the Dark Energy Spectroscopic Instrument (DESI). We confirm that iron emission strength serves as a good tracer of the Eddington ratio, and estimate SMBH masses using an iron-corrected $R$-$L$ relation for H$\\beta$, where $R$ is the broad line region size and $L$ is the continuum luminosity. Compared to our measurements, previous canonical measurements without the iron correction are overestimated by a facto"},"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":"2502.03684","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2025-02-06T00:12:04Z","cross_cats_sorted":[],"title_canon_sha256":"33e19cdd457ab238d8ef1ec9fdf3260c65fa12a3b987ea60800844232b6b8871","abstract_canon_sha256":"2f9de3ce27e4ddb98f23a36abe46c75faa50a5fa086a0ce55e05cbec2a82385b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:10:13.763713Z","signature_b64":"ONfL/YZtzM6djly502EE7JZ/tZrln4hr/BHW4zp16NzCd6Ks9x5CkgdHZddWOmGRBIblBryj8NO665MeSYTJAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6fea8d14464a31e598c574edc02a69cc748ad14b4f65b8adab06f20e8ef6174e","last_reissued_at":"2026-07-05T10:10:13.763232Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:10:13.763232Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Iron-corrected Single-epoch Black Hole Masses of DESI Quasars at low redshift","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aaron Meisner, Adam Myers, Andrew Lambert, Axel de la Macorra, Benjamin Alan Weaver, Claire Poppett, David Brooks, David Sprayberry, Enrique Gazta\\~naga, Eusebio Sanchez, Francisco Prada, Graziano Rossi, Gregory Tarl\\'e, Hee-Jong Seo, Hu Zou, Jessica Nicole Aguilar, John Moustakas, Laurent Le Guillou, Linhua Jiang, Ma{\\l}gorzata Siudek, Marc Manera, Martin Landriau, Michael Schubnell, Paul Martini, Peter Doel, Ramon Miquel, Satya Gontcho A Gontcho, Shengxiu Sun, Stephanie Juneau, Steven Ahlen, Theodore Kisner, Todd Claybaugh, Wei-Jian Guo, Zhiwei Pan","submitted_at":"2025-02-06T00:12:04Z","abstract_excerpt":"We present a study on the possible overestimation of single-epoch supermassive black hole (SMBH) masses in previous works, based on more than 55,000 type 1 quasars at $0.25 < z < 0.8$ from the Dark Energy Spectroscopic Instrument (DESI). We confirm that iron emission strength serves as a good tracer of the Eddington ratio, and estimate SMBH masses using an iron-corrected $R$-$L$ relation for H$\\beta$, where $R$ is the broad line region size and $L$ is the continuum luminosity. Compared to our measurements, previous canonical measurements without the iron correction are overestimated by a facto"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.03684","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2502.03684/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2502.03684","created_at":"2026-07-05T10:10:13.763291+00:00"},{"alias_kind":"arxiv_version","alias_value":"2502.03684v1","created_at":"2026-07-05T10:10:13.763291+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.03684","created_at":"2026-07-05T10:10:13.763291+00:00"},{"alias_kind":"pith_short_12","alias_value":"N7VI2FCGJIY6","created_at":"2026-07-05T10:10:13.763291+00:00"},{"alias_kind":"pith_short_16","alias_value":"N7VI2FCGJIY6LGGF","created_at":"2026-07-05T10:10:13.763291+00:00"},{"alias_kind":"pith_short_8","alias_value":"N7VI2FCG","created_at":"2026-07-05T10:10:13.763291+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2607.07329","citing_title":"Beyond traditional emission-line diagnostics: using autoencoders to uncover active galactic nuclei in DESI spectra","ref_index":66,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR","json":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR.json","graph_json":"https://pith.science/api/pith-number/N7VI2FCGJIY6LGGFOTW4AKTJZR/graph.json","events_json":"https://pith.science/api/pith-number/N7VI2FCGJIY6LGGFOTW4AKTJZR/events.json","paper":"https://pith.science/paper/N7VI2FCG"},"agent_actions":{"view_html":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR","download_json":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR.json","view_paper":"https://pith.science/paper/N7VI2FCG","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2502.03684&json=true","fetch_graph":"https://pith.science/api/pith-number/N7VI2FCGJIY6LGGFOTW4AKTJZR/graph.json","fetch_events":"https://pith.science/api/pith-number/N7VI2FCGJIY6LGGFOTW4AKTJZR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR/action/storage_attestation","attest_author":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR/action/author_attestation","sign_citation":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR/action/citation_signature","submit_replication":"https://pith.science/pith/N7VI2FCGJIY6LGGFOTW4AKTJZR/action/replication_record"}},"created_at":"2026-07-05T10:10:13.763291+00:00","updated_at":"2026-07-05T10:10:13.763291+00:00"}