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Moustakas, J. Nie, J. Silber, K. Dawson, K. Fanning, K. Honscheid, L. Le Guillou, M. Landriau, M. Manera, M. Rezaie, M. Schubnell, M. Siudek, N. Palanque-Delabrouille, O. Ruiz-Macias, P. Doel, P. Martini, R. Canning, R. Kehoe, R. Miquel, R. Pucha, S. Ahlen, S. Alam, S. Bailey, S. Cole, S. Gontcho A Gontcho, S. Juneau, T. Claybaugh, T. Kisner, V. A. Fawcett, W. J. Percival, Z. Pan, Z. Zhou","submitted_at":"2024-04-04T17:43:34Z","abstract_excerpt":"The Dark Energy Spectroscopic Instrument (DESI) cosmology survey includes a Bright Galaxy Survey (BGS) which will yield spectra for over ten million bright galaxies (r<20.2 AB mag). The resulting sample will be valuable for both cosmological and astrophysical studies. However, the star/galaxy separation criterion implemented in the nominal BGS target selection algorithm excludes quasar host galaxies in addition to bona fide stars. While this excluded population is comparatively rare (~3-4 per square degrees), it may hold interesting clues regarding galaxy and quasar physics. Therefore, we pres"},"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":"2404.03621","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-04T17:43:34Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"1a636fc11a6113bc31edc49ed1c4a61653d0129af270707ea5a856b1936b233e","abstract_canon_sha256":"16012d9e37177c52c16b8de9d557fe6cbd703cc6e19710045362353bdefcf57b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:04:28.455776Z","signature_b64":"BA6RaZS9hR9Ufdk64NWnBjTSivcuHOERNIxf9Wt5mcpvKO8utiO1uHKhLX2HaDh09ubKSdUdCgIg4t/Kfgw0Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9ce3dbf64909109778089254373a04ca3cc7cbf3399f9605a87058f67f18dc62","last_reissued_at":"2026-07-05T08:04:28.455375Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:04:28.455375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Identifying Quasars from the DESI Bright Galaxy Survey","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.GA","authors_text":"A. de la Macorra, A. D. Myers, A. Kremin, A. Lambert, A. Meisner, A. Mu\\~noz-Guti\\'errez, Arjun Dey, C. Circosta, C. Hahn, C. Poppett, C. Ravoux, D. Brooks, D. M. Alexander, D. Schlegel, D. Sprayberry, E. Chaussidon, E. F. Schlafly, E. Gazta\\~naga, E. Sanchez, F. Prada, G. Gutierrez, G. Rossi, G. Tarl\\'e, H. Seo, H. Zou (DESI Collaboration), J. Aguilar, J. E. Forero-Romero, J. Moustakas, J. Nie, J. Silber, K. Dawson, K. Fanning, K. Honscheid, L. Le Guillou, M. Landriau, M. Manera, M. Rezaie, M. Schubnell, M. Siudek, N. Palanque-Delabrouille, O. Ruiz-Macias, P. Doel, P. Martini, R. Canning, R. Kehoe, R. Miquel, R. Pucha, S. Ahlen, S. Alam, S. Bailey, S. Cole, S. Gontcho A Gontcho, S. Juneau, T. Claybaugh, T. Kisner, V. A. Fawcett, W. J. Percival, Z. Pan, Z. Zhou","submitted_at":"2024-04-04T17:43:34Z","abstract_excerpt":"The Dark Energy Spectroscopic Instrument (DESI) cosmology survey includes a Bright Galaxy Survey (BGS) which will yield spectra for over ten million bright galaxies (r<20.2 AB mag). 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