The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
D. M. AlexanderCentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK; [email protected]T. M. DavisSchool of Mathematics and Physics, University of Queensland, 4072, AustraliaE. ChaussidonIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceVictoria A. FawcettCentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK; [email protected]Alma X. González‐MoralesConsejo Nacional de Ciencia y Tecnología, Av. Insurgentes Sur 1582. Colonia Crédito Constructor, Del. Benito Juárez C.P. 03940, México D.F. MÉxicoTing-Wen LanGraduate Institute of Astrophysics and Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanChristophe YècheIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceS. AhlenPhysics Dept., Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USAJ. AguilarLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAE. ArmengaudUniversité Paris-SaclayS. BaileyLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USADavid BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UKZ. CaiDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA 95065, USARebecca CanningInstitute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, UKAnthony CarrSchool of Mathematics and Physics, University of Queensland, 4072, AustraliaSolène ChabanierLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAMarie-Claude CousinouAix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, FranceKyle DawsonDepartment of Physics and Astronomy, The University of Utah, 115 South 1400 East, Salt Lake City, UT 84112, USAAxel de la MacorraInstituto de Física, Universidad Nacional Autónoma de México, Cd. de México C.P. 04510, MéxicoArjun DeyNSF’s National Optical-Infrared Astronomy Research Laboratory, 950 N. Cherry Avenue, Tucson, AZ 85719, USABiprateep DeyDepartment of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, USAG. DhunganaDepartment of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, USAA. C. EdgeCentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK; [email protected]S. EftekharzadehUniversities Space Research Association, NASA Ames Research Centre, USAJames R. FarrDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UKAndreu Font-RiberaInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra Barcelona, SpainJ. García-BellidoInstituto de Física Teórica (IFT) UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, E-28049, Madrid, SpainLehman H. GarrisonCenter for Computational Astrophysics Flatiron Institute 162 5th Avenue, New York, NY 10010, USAE. GaztañagaInstitute of Space Sciences, ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainSatya Gontcho A GontchoDepartment of Physics and Astronomy, University of Rochester, 500 Joseph C. Wilson Boulevard, Rochester, NY 14627, USAC. GordonInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra Barcelona, SpainStefany Guadalupe Medellin GonzalezDepartamento de Física, Universidad de Guanajuato—DCI, C.P. 37150, Leon, Guanajuato, MéxicoJ. GuyLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAH. K. Herrera-AlcantarDepartamento de Física, Universidad de Guanajuato—DCI, C.P. 37150, Leon, Guanajuato, MéxicoLinhua JiangKavli Institute for Astronomy and Astrophysics at Peking University, PKU, 5 Yiheyuan Road, Haidian District, Beijing 100871, People's Republic of ChinaS. JuneauNSF’s National Optical-Infrared Astronomy Research Laboratory, 950 N. Cherry Avenue, Tucson, AZ 85719, USANaim Göksel KaraçaylıCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USAR. KehoeDepartment of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, USATheodore KisnerLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAAndrás KovácsDepartamento de Astrofísica, Universidad de La Laguna (ULL), E-38206, La Laguna, Tenerife, SpainMartin LandriauLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAM. E. LeviLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAC. MagnevilleIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceJ. ErezaCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USAAaron MeisnerNSF’s National Optical-Infrared Astronomy Research Laboratory, 950 N. Cherry Avenue, Tucson, AZ 85719, USAMar MezcuaInstitute of Space Sciences, ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainR. MiquelInstitució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, E-08010 Barcelona, SpainPaulo Montero-CamachoDepartment of Astronomy, Tsinghua University, 30 Shuangqing Road, Haidian District, Beijing, 100190, People's Republic of ChinaJohn MoustakasDepartment of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, USAA. Muñoz-GutiérrezInstituto de Física, Universidad Nacional Autónoma de México, Cd. de México C.P. 04510, MéxicoAdam D. MyersDepartment of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, USAS. NadathurDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UKL. NapolitanoDepartment of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, USAJundan NieNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100012, People's Republic of ChinaN. Palanque‐DelabrouilleIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceZhiwei PanKavli Institute for Astronomy and Astrophysics at Peking University, PKU, 5 Yiheyuan Road, Haidian District, Beijing 100871, People's Republic of ChinaWill J. PercivalDepartment of Physics and Astronomy, University of Waterloo, 200 University Avenue W, Waterloo, ON N2L 3G1, CanadaIgnasi Pérez-RàfolsInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra Barcelona, SpainClaire PoppettLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USAFrancisco PradaInstituto de Astrofisica de Andalucía, Glorieta de la Astronomía, s/n, E-18008 Granada, SpainC. Ramírez-PérezInstitut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra Barcelona, SpainC. RavouxIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceD. J. RosarioCentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UK; [email protected]M. SchubnellDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAG. TarléDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAMichael WaltherExcellence Cluster ORIGINS, Boltzmannstrasse 2, D-85748 Garching, GermanyBenjamin J. WeinerSteward Observatory, University of Arizona, 933 N, Cherry Avenue, Tucson, AZ 85721, USASamantha YoulesInstitute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX, UKZhimin ZhouNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100012, People's Republic of ChinaH. ZouNational Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing, 100012, People's Republic of ChinaSiwei ZouDepartment of Astronomy, Tsinghua University, 30 Shuangqing Road, Haidian District, Beijing, 100190, People's Republic of China
2023en
ABI
Аннотация
Abstract A 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.
Перевод пока недоступен
Идентификаторы
Цитирования и источники
Цитирований: 4Использованных источников: 0