{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:25ZLGNP5WJI5PO4ATT4JBWZQ52","short_pith_number":"pith:25ZLGNP5","schema_version":"1.0","canonical_sha256":"d772b335fdb251d7bb809cf890db30ee997befc075605756d43bc9898b1a276b","source":{"kind":"arxiv","id":"2212.04179","version":2},"attestation_state":"computed","paper":{"title":"The Pan-STARRS1 $\\mathbf{z>5.6}$ Quasar Survey: III. The $\\mathbf{z\\approx6}$ Quasar Luminosity Function","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bram P. Venemans, Chiara Mazzucchelli, Daniel Stern, Eduardo Ba\\~nados, Emanuele Paolo Farina, Fabian Walter, Hans-Walter Rix, Jan-Torge Schindler, Riccardo Nanni, Roberto Decarli, Thomas Connor, Xiaohui Fan","submitted_at":"2022-12-08T10:34:17Z","abstract_excerpt":"We present the $z\\!\\approx\\!6$ type-1 quasar luminosity function (QLF) based on the Pan-STARRS1 (PS1) quasar survey. The PS1 sample includes 125 quasars at $z\\approx5.7-6.2$ with $-28\\lesssim M_{1450}\\lesssim-25$. Complemented by 48 fainter quasars from the SHELLQs survey, we evaluate the $z\\approx6$ QLF over $-28\\lesssim M_{1450}\\lesssim-22$. Adopting a double power law with an exponential evolution of the quasar density ($\\Phi(z)\\propto10^{k(z-6)}$; $k=-0.7$), we use a maximum likelihood method to model our data. We find a break magnitude of $M^*=-26.38_{-0.60}^{+0.79}\\,\\text{mag}$, a faint "},"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":"2212.04179","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2022-12-08T10:34:17Z","cross_cats_sorted":[],"title_canon_sha256":"c60535fa59673229759f1ef43d8fd9a6a19211cdc05ad19a8638773008a5b44b","abstract_canon_sha256":"df2f50d42cf8ee36863b4887db8fb039cfb6a830bda959addc3f187e58594ec9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:40:10.261912Z","signature_b64":"haS4DWYvALbIPijPLcNvhAsHFkZls7+tndoN5PQkvzhGhaVnhL98dchdKFIiaHQQGhqu9QZiollljX0tiQywDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d772b335fdb251d7bb809cf890db30ee997befc075605756d43bc9898b1a276b","last_reissued_at":"2026-07-05T05:40:10.261392Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:40:10.261392Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Pan-STARRS1 $\\mathbf{z>5.6}$ Quasar Survey: III. The $\\mathbf{z\\approx6}$ Quasar Luminosity Function","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Bram P. Venemans, Chiara Mazzucchelli, Daniel Stern, Eduardo Ba\\~nados, Emanuele Paolo Farina, Fabian Walter, Hans-Walter Rix, Jan-Torge Schindler, Riccardo Nanni, Roberto Decarli, Thomas Connor, Xiaohui Fan","submitted_at":"2022-12-08T10:34:17Z","abstract_excerpt":"We present the $z\\!\\approx\\!6$ type-1 quasar luminosity function (QLF) based on the Pan-STARRS1 (PS1) quasar survey. The PS1 sample includes 125 quasars at $z\\approx5.7-6.2$ with $-28\\lesssim M_{1450}\\lesssim-25$. Complemented by 48 fainter quasars from the SHELLQs survey, we evaluate the $z\\approx6$ QLF over $-28\\lesssim M_{1450}\\lesssim-22$. Adopting a double power law with an exponential evolution of the quasar density ($\\Phi(z)\\propto10^{k(z-6)}$; $k=-0.7$), we use a maximum likelihood method to model our data. We find a break magnitude of $M^*=-26.38_{-0.60}^{+0.79}\\,\\text{mag}$, a faint "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2212.04179","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2212.04179/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":"2212.04179","created_at":"2026-07-05T05:40:10.261463+00:00"},{"alias_kind":"arxiv_version","alias_value":"2212.04179v2","created_at":"2026-07-05T05:40:10.261463+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2212.04179","created_at":"2026-07-05T05:40:10.261463+00:00"},{"alias_kind":"pith_short_12","alias_value":"25ZLGNP5WJI5","created_at":"2026-07-05T05:40:10.261463+00:00"},{"alias_kind":"pith_short_16","alias_value":"25ZLGNP5WJI5PO4A","created_at":"2026-07-05T05:40:10.261463+00:00"},{"alias_kind":"pith_short_8","alias_value":"25ZLGNP5","created_at":"2026-07-05T05:40:10.261463+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/25ZLGNP5WJI5PO4ATT4JBWZQ52","json":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52.json","graph_json":"https://pith.science/api/pith-number/25ZLGNP5WJI5PO4ATT4JBWZQ52/graph.json","events_json":"https://pith.science/api/pith-number/25ZLGNP5WJI5PO4ATT4JBWZQ52/events.json","paper":"https://pith.science/paper/25ZLGNP5"},"agent_actions":{"view_html":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52","download_json":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52.json","view_paper":"https://pith.science/paper/25ZLGNP5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2212.04179&json=true","fetch_graph":"https://pith.science/api/pith-number/25ZLGNP5WJI5PO4ATT4JBWZQ52/graph.json","fetch_events":"https://pith.science/api/pith-number/25ZLGNP5WJI5PO4ATT4JBWZQ52/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52/action/timestamp_anchor","attest_storage":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52/action/storage_attestation","attest_author":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52/action/author_attestation","sign_citation":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52/action/citation_signature","submit_replication":"https://pith.science/pith/25ZLGNP5WJI5PO4ATT4JBWZQ52/action/replication_record"}},"created_at":"2026-07-05T05:40:10.261463+00:00","updated_at":"2026-07-05T05:40:10.261463+00:00"}