The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra

Alexander, David M. et al.--Full list of authors: Alexander, David M.; Davis, Tamara M.; Chaussidon, E.; Fawcett, V. A.; X. Gonzalez-Morales, Alma; Lan, Ting-Wen; Yeche, Christophe; Ahlen, S.; Aguilar, J. N.; Armengaud, E.; Bailey, S.; Brooks, D.; Cai, Z.; Canning, R.; Carr, A.; Chabanier, S.; Cousi...

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Detalles Bibliográficos
Autores: Alexander, David M., García-Bellido, Juan, Gaztañaga, Enrique, Mezcua, Mar, Prada, Francisco, Zou, Siwei
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/309752
Acceso en línea:http://hdl.handle.net/10261/309752
Access Level:acceso abierto
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oai_identifier_str oai:digital.csic.es:10261/309752
network_acronym_str ES
network_name_str España
repository_id_str
dc.title.none.fl_str_mv The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
title The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
spellingShingle The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
Alexander, David M.
title_short The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
title_full The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
title_fullStr The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
title_full_unstemmed The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
title_sort The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
dc.creator.none.fl_str_mv Alexander, David M.
García-Bellido, Juan
Gaztañaga, Enrique
Mezcua, Mar
Prada, Francisco
Zou, Siwei
author Alexander, David M.
author_facet Alexander, David M.
García-Bellido, Juan
Gaztañaga, Enrique
Mezcua, Mar
Prada, Francisco
Zou, Siwei
author_role author
author2 García-Bellido, Juan
Gaztañaga, Enrique
Mezcua, Mar
Prada, Francisco
Zou, Siwei
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Science and Technology Facilities Council (UK)
Ministry of Education (Taiwan)
National Taiwan University
Department of Energy (US)
National Energy Research Scientific Computing Center (US)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Alexander, David M. et al.--Full list of authors: Alexander, David M.; Davis, Tamara M.; Chaussidon, E.; Fawcett, V. A.; X. Gonzalez-Morales, Alma; Lan, Ting-Wen; Yeche, Christophe; Ahlen, S.; Aguilar, J. N.; Armengaud, E.; Bailey, S.; Brooks, D.; Cai, Z.; Canning, R.; Carr, A.; Chabanier, S.; Cousinou, Marie-Claude; Dawson, K.; de la Macorra, A.; Dey, A.; Dey, Biprateep; Dhungana, G.; Edge, A. C.; Eftekharzadeh, S.; Fanning, K.; Farr, James; Font-Ribera, A.; Garcia-Bellido, J.; Garrison, Lehman; Gaztanaga, E.; Gontcho, Satya Gontcho; Gordon, C.; Medellin Gonzalez, Stefany Guadalupe; Guy, J.; Herrera-Alcantar, Hiram K.; Jiang, L.; Juneau, S.; Karacayli, N. G.; Kehoe, R.; Kisner, T.; Kovacs, A.; Landriau, M.; Levi, Michael E.; Magneville, C.; Martini, P.; Meisner, Aaron M.; Mezcua, M.; Miquel, R.; Camacho, P. Montero; Moustakas, J.; Munoz-Gutierrez, Andrea; Myers, Adam D.; Nadathur, S.; Napolitano, L.; Nie, J. D.; Palanque-Delabrouille, N.; Pan, Z.; Percival, W. J.; Perez-Rafols, I.; Poppett, C.; Prada, F.; Ramirez-Perez, Cesar; Ravoux, C.; Rosario, D. J.; Schubnell, M.; Tarle, Gregory; Walther, M.; Weiner, B.; Youles, S.; Zhou, Zhimin; Zou, H.; Zou, Siwei
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/309752
url http://hdl.handle.net/10261/309752
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.3847/1538-3881/acacfc
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
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spelling The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey SpectraAlexander, David M.García-Bellido, JuanGaztañaga, EnriqueMezcua, MarPrada, FranciscoZou, SiweiAlexander, David M. et al.--Full list of authors: Alexander, David M.; Davis, Tamara M.; Chaussidon, E.; Fawcett, V. A.; X. Gonzalez-Morales, Alma; Lan, Ting-Wen; Yeche, Christophe; Ahlen, S.; Aguilar, J. N.; Armengaud, E.; Bailey, S.; Brooks, D.; Cai, Z.; Canning, R.; Carr, A.; Chabanier, S.; Cousinou, Marie-Claude; Dawson, K.; de la Macorra, A.; Dey, A.; Dey, Biprateep; Dhungana, G.; Edge, A. C.; Eftekharzadeh, S.; Fanning, K.; Farr, James; Font-Ribera, A.; Garcia-Bellido, J.; Garrison, Lehman; Gaztanaga, E.; Gontcho, Satya Gontcho; Gordon, C.; Medellin Gonzalez, Stefany Guadalupe; Guy, J.; Herrera-Alcantar, Hiram K.; Jiang, L.; Juneau, S.; Karacayli, N. G.; Kehoe, R.; Kisner, T.; Kovacs, A.; Landriau, M.; Levi, Michael E.; Magneville, C.; Martini, P.; Meisner, Aaron M.; Mezcua, M.; Miquel, R.; Camacho, P. Montero; Moustakas, J.; Munoz-Gutierrez, Andrea; Myers, Adam D.; Nadathur, S.; Napolitano, L.; Nie, J. D.; Palanque-Delabrouille, N.; Pan, Z.; Percival, W. J.; Perez-Rafols, I.; Poppett, C.; Prada, F.; Ramirez-Perez, Cesar; Ravoux, C.; Rosario, D. J.; Schubnell, M.; Tarle, Gregory; Walther, M.; Weiner, B.; Youles, S.; Zhou, Zhimin; Zou, H.; Zou, SiweiA key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data to quantify key survey metrics. In this paper we present results from VI of the quasar survey using deep coadded SV spectra. We show that the majority (≈70%) of the main-survey targets are spectroscopically confirmed as quasars, with ≈16% galaxies, ≈6% stars, and ≈8% low-quality spectra lacking reliable features. A nonnegligible fraction of the quasars are misidentified by the standard spectroscopic pipeline, but we show that the majority can be recovered using post-pipeline "afterburner" quasar-identification approaches. We combine these "afterburners" with our standard pipeline to create a modified pipeline to increase the overall quasar yield. At the depth of the main DESI survey, both pipelines achieve a good-redshift purity (reliable redshifts measured within 3000 km s−1) of ≈99%; however, the modified pipeline recovers ≈94% of the visually inspected quasars, as compared to ≈86% from the standard pipeline. We demonstrate that both pipelines achieve a median redshift precision and accuracy of ≈100 km s−1 and ≈70 km s−1, respectively. We constructed composite spectra to investigate why some quasars are missed by the standard pipeline and find that they are more host-galaxy dominated (i.e., distant analogs of "Seyfert galaxies") and/or more dust reddened than the standard-pipeline quasars. We also show example spectra to demonstrate the overall diversity of the DESI quasar sample and provide strong-lensing candidates where two targets contribute to a single spectrum. © 2023. The Author(s). Published by the American Astronomical Society.D.M.A. and V.A.F. acknowledge the Science Technology and Facilities Council (STFC) for support through grant codes ST/T000244/1 and ST/S505365/1 (quota studentship). T.W.L. acknowledges support from the Ministry of Science and Technology (MOST 111-2112-M-002-015-MY3), the Ministry of Education, Taiwan (Yushan Young Scholar grant NTU-110VV007), and National Taiwan University research grant (NTU-CC-111L894806). A.D.M. acknowledges support by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under award No. DE-SC0019022. This research is supported by the Director, Office of Science, Office of High Energy Physics of the U.S. Department of Energy under contract No. DE-AC02-05CH11231, and by the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility under the same contract; additional support for DESI is provided by the U.S. National Science Foundation, Division of Astronomical Sciences under contract No. AST-0950945 to the NSF's National Optical-Infrared Astronomy Research Laboratory; the Science and Technologies Facilities Council of the United Kingdom; the Gordon and Betty Moore Foundation; the Heising-Simons Foundation; the French Alternative Energies and Atomic Energy Commission (CEA); the National Council of Science and Technology of Mexico (CONACYT); the Ministry of Science and Innovation of Spain (MICINN), and by the DESI Member Institutions: https://www.desi.lbl.gov/collaborating-institutions.Peer reviewedIOP PublishingMinisterio de Ciencia e Innovación (España)Science and Technology Facilities Council (UK)Ministry of Education (Taiwan)National Taiwan UniversityDepartment of Energy (US)National Energy Research Scientific Computing Center (US)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/309752reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.3847/1538-3881/acacfcSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3097522026-05-22T06:33:51Z
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