The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument
We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and quasars using a purpose-built instrument on the 4 m Mayall Telescope at Kitt Peak National Observatory. The main goal of D...
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-3881/acb212 |
| _version_ | 1827831451896250368 |
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| author | J. Guy S. Bailey A. Kremin Shadab Alam D. M. Alexander C. Allende Prieto S. BenZvi A. S. Bolton D. Brooks E. Chaussidon A. P. Cooper K. Dawson A. de la Macorra A. Dey Biprateep Dey G. Dhungana D. J. Eisenstein A. Font-Ribera J. E. Forero-Romero E. Gaztañaga S. Gontcho A Gontcho D. Green K. Honscheid M. Ishak R. Kehoe D. Kirkby T. Kisner Sergey E. Koposov Ting-Wen Lan M. Landriau L. Le Guillou Michael E. Levi C. Magneville Christopher J. Manser P. Martini Aaron M. Meisner R. Miquel J. Moustakas Adam D. Myers Jeffrey A. Newman Jundan Nie N. Palanque-Delabrouille W. J. Percival C. Poppett F. Prada A. Raichoor C. Ravoux A. J. Ross E. F. Schlafly D. Schlegel M. Schubnell Ray M. Sharples Gregory Tarlé B. A. Weaver Christophe Yéche Rongpu Zhou Zhimin Zhou H. Zou |
| author_facet | J. Guy S. Bailey A. Kremin Shadab Alam D. M. Alexander C. Allende Prieto S. BenZvi A. S. Bolton D. Brooks E. Chaussidon A. P. Cooper K. Dawson A. de la Macorra A. Dey Biprateep Dey G. Dhungana D. J. Eisenstein A. Font-Ribera J. E. Forero-Romero E. Gaztañaga S. Gontcho A Gontcho D. Green K. Honscheid M. Ishak R. Kehoe D. Kirkby T. Kisner Sergey E. Koposov Ting-Wen Lan M. Landriau L. Le Guillou Michael E. Levi C. Magneville Christopher J. Manser P. Martini Aaron M. Meisner R. Miquel J. Moustakas Adam D. Myers Jeffrey A. Newman Jundan Nie N. Palanque-Delabrouille W. J. Percival C. Poppett F. Prada A. Raichoor C. Ravoux A. J. Ross E. F. Schlafly D. Schlegel M. Schubnell Ray M. Sharples Gregory Tarlé B. A. Weaver Christophe Yéche Rongpu Zhou Zhimin Zhou H. Zou |
| author_sort | J. Guy |
| collection | DOAJ |
| description | We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and quasars using a purpose-built instrument on the 4 m Mayall Telescope at Kitt Peak National Observatory. The main goal of DESI is to measure with unprecedented precision the expansion history of the universe with the baryon acoustic oscillation technique and the growth rate of structure with redshift space distortions. Ten spectrographs with three cameras each disperse the light from 5000 fibers onto 30 CCDs, covering the near-UV to near-infrared (3600–9800 Å) with a spectral resolution ranging from 2000 to 5000. The DESI data pipeline generates wavelength- and flux-calibrated spectra of all the targets, along with spectroscopic classifications and redshift measurements. Fully processed data from each night are typically available to the DESI collaboration the following morning. We give details about the pipeline’s algorithms, and provide performance results on the stability of the optics, the quality of the sky background subtraction, and the precision and accuracy of the instrumental calibration. This pipeline has been used to process the DESI Survey Validation data set, and has exceeded the project’s requirements for redshift performance, with high efficiency and a purity greater than 99% for all target classes. |
| first_indexed | 2024-03-12T04:44:55Z |
| format | Article |
| id | doaj.art-5a5d1a71e2eb4fc38171584b263936ba |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T04:44:55Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-5a5d1a71e2eb4fc38171584b263936ba2023-09-03T09:29:33ZengIOP PublishingThe Astronomical Journal1538-38812023-01-01165414410.3847/1538-3881/acb212The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic InstrumentJ. Guy0https://orcid.org/0000-0001-9822-6793S. Bailey1https://orcid.org/0000-0003-4162-6619A. Kremin2https://orcid.org/0000-0001-6356-7424Shadab Alam3https://orcid.org/0000-0002-3757-6359D. M. Alexander4https://orcid.org/0000-0002-5896-6313C. Allende Prieto5https://orcid.org/0000-0002-0084-572XS. BenZvi6https://orcid.org/0000-0001-5537-4710A. S. Bolton7D. Brooks8https://orcid.org/0000-0002-8458-5047E. Chaussidon9https://orcid.org/0000-0001-8996-4874A. P. Cooper10https://orcid.org/0000-0001-8274-158XK. Dawson11https://orcid.org/0000-0002-0553-3805A. de la Macorra12A. Dey13https://orcid.org/0000-0002-4928-4003Biprateep Dey14https://orcid.org/0000-0002-5665-7912G. Dhungana15D. J. Eisenstein16https://orcid.org/0000-0002-2929-3121A. Font-Ribera17https://orcid.org/0000-0002-3033-7312J. E. Forero-Romero18https://orcid.org/0000-0002-2890-3725E. Gaztañaga19https://orcid.org/0000-0001-9632-0815S. Gontcho A Gontcho20D. Green21https://orcid.org/0000-0002-0676-3661K. Honscheid22M. Ishak23https://orcid.org/0000-0002-6024-466XR. Kehoe24https://orcid.org/0000-0002-7101-697XD. Kirkby25https://orcid.org/0000-0002-8828-5463T. Kisner26Sergey E. Koposov27https://orcid.org/0000-0003-2644-135XTing-Wen Lan28https://orcid.org/0000-0001-8857-7020M. Landriau29https://orcid.org/0000-0003-1838-8528L. Le Guillou30https://orcid.org/0000-0001-7178-8868Michael E. Levi31https://orcid.org/0000-0003-1887-1018C. Magneville32Christopher J. Manser33https://orcid.org/0000-0003-1543-5405P. Martini34https://orcid.org/0000-0002-0194-4017Aaron M. Meisner35https://orcid.org/0000-0002-1125-7384R. Miquel36https://orcid.org/0000-0002-6610-4836J. Moustakas37https://orcid.org/0000-0002-2733-4559Adam D. Myers38Jeffrey A. Newman39https://orcid.org/0000-0001-8684-2222Jundan Nie40https://orcid.org/0000-0001-6590-8122N. Palanque-Delabrouille41W. J. Percival42https://orcid.org/0000-0002-0644-5727C. Poppett43F. Prada44A. Raichoor45https://orcid.org/0000-0001-5999-7923C. Ravoux46A. J. Ross47E. F. Schlafly48https://orcid.org/0000-0002-3569-7421D. Schlegel49https://orcid.org/0000-0002-5042-5088M. Schubnell50Ray M. Sharples51https://orcid.org/0000-0003-3449-8583Gregory Tarlé52https://orcid.org/0000-0003-1704-0781B. A. Weaver53Christophe Yéche54https://orcid.org/0000-0001-5146-8533Rongpu Zhou55https://orcid.org/0000-0001-5381-4372Zhimin Zhou56H. Zou57https://orcid.org/0000-0002-6684-3997Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govInstitute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKCentre for Extragalactic Astronomy, Department of Physics, Durham University , South Road, Durham, DH1 3LE, UKInstituto de Astrofísica de Canarias, C/ Vía Láctea, s/n, E-38205 La Laguna, Tenerife, Spain Universidad de La Laguna , Dept. de Astrofísica, E-38206 La Laguna, Tenerife, SpainDepartment of Physics & Astronomy, University of Rochester , 206 Bausch and Lomb Hall, P.O. Box 270171, Rochester, NY 14627-0171, USANSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USADepartment of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UKIRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceInstitute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Road Sec. 2, Hsinchu 30013, TaiwanDepartment of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USAInstituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, MéxicoNSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USADepartment of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh , 3941 O’Hara Street, Pittsburgh, PA 15260, USADepartment of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USAInstitut de Física dAltes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona, SpainDepartamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, ColombiaInstitut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona, Spain; Institute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, E-08913 Bellaterra, Barcelona, SpainLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govDepartment of Physics and Astronomy, University of California , Irvine, CA 92697, USACenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; Department of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; The Ohio State University , Columbus, OH 43210, USADepartment of Physics, The University of Texas at Dallas , Richardson, TX 75080, USADepartment of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USADepartment of Physics and Astronomy, University of California , Irvine, CA 92697, USALawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govInstitute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKGraduate Institute of Astrophysics and Department of Physics, National Taiwan University , No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govSorbonne Université , CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), F-75005 Paris, FranceLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govIRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceDepartment of Physics, University of Warwick , Coventry, CV4 7AL, UKCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; The Ohio State University , Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University , 4055 McPherson Laboratory, 140 W 18th Avenue, Columbus, OH 43210, USANSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USAInstitut de Física dAltes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, E-08010 Barcelona, SpainDepartment of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USADepartment of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USADepartment of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh , 3941 O’Hara Street, Pittsburgh, PA 15260, USANational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of ChinaLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.gov; IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceDepartment of Physics and Astronomy, University of Waterloo , 200 University Avenue W, Waterloo, ON N2L 3G1, Canada; Perimeter Institute for Theoretical Physics , 31 Caroline Street North, Waterloo, ON N2L 2Y5, Canada; Waterloo Centre for Astrophysics, University of Waterloo , 200 University Avenue W, Waterloo, ON N2L 3G1, CanadaLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.gov; Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720, USA; University of California , Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720, USAInstituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, SpainLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govIRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceCenter for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; The Ohio State University , Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University , 4055 McPherson Laboratory, 140 W 18th Avenue, Columbus, OH 43210, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USALawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govDepartment of Physics, University of Michigan , Ann Arbor, MI 48109, USA; University of Michigan , Ann Arbor, MI 48109, USACentre for Advanced Instrumentation, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK; Institute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UKUniversity of Michigan , Ann Arbor, MI 48109, USANSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USAIRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, FranceLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; jguy@lbl.govNational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of ChinaNational Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of ChinaWe describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and quasars using a purpose-built instrument on the 4 m Mayall Telescope at Kitt Peak National Observatory. The main goal of DESI is to measure with unprecedented precision the expansion history of the universe with the baryon acoustic oscillation technique and the growth rate of structure with redshift space distortions. Ten spectrographs with three cameras each disperse the light from 5000 fibers onto 30 CCDs, covering the near-UV to near-infrared (3600–9800 Å) with a spectral resolution ranging from 2000 to 5000. The DESI data pipeline generates wavelength- and flux-calibrated spectra of all the targets, along with spectroscopic classifications and redshift measurements. Fully processed data from each night are typically available to the DESI collaboration the following morning. We give details about the pipeline’s algorithms, and provide performance results on the stability of the optics, the quality of the sky background subtraction, and the precision and accuracy of the instrumental calibration. This pipeline has been used to process the DESI Survey Validation data set, and has exceeded the project’s requirements for redshift performance, with high efficiency and a purity greater than 99% for all target classes.https://doi.org/10.3847/1538-3881/acb212Galaxy spectroscopyHigh-redshift galaxiesRedshift surveys |
| spellingShingle | J. Guy S. Bailey A. Kremin Shadab Alam D. M. Alexander C. Allende Prieto S. BenZvi A. S. Bolton D. Brooks E. Chaussidon A. P. Cooper K. Dawson A. de la Macorra A. Dey Biprateep Dey G. Dhungana D. J. Eisenstein A. Font-Ribera J. E. Forero-Romero E. Gaztañaga S. Gontcho A Gontcho D. Green K. Honscheid M. Ishak R. Kehoe D. Kirkby T. Kisner Sergey E. Koposov Ting-Wen Lan M. Landriau L. Le Guillou Michael E. Levi C. Magneville Christopher J. Manser P. Martini Aaron M. Meisner R. Miquel J. Moustakas Adam D. Myers Jeffrey A. Newman Jundan Nie N. Palanque-Delabrouille W. J. Percival C. Poppett F. Prada A. Raichoor C. Ravoux A. J. Ross E. F. Schlafly D. Schlegel M. Schubnell Ray M. Sharples Gregory Tarlé B. A. Weaver Christophe Yéche Rongpu Zhou Zhimin Zhou H. Zou The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument The Astronomical Journal Galaxy spectroscopy High-redshift galaxies Redshift surveys |
| title | The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument |
| title_full | The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument |
| title_fullStr | The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument |
| title_full_unstemmed | The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument |
| title_short | The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument |
| title_sort | spectroscopic data processing pipeline for the dark energy spectroscopic instrument |
| topic | Galaxy spectroscopy High-redshift galaxies Redshift surveys |
| url | https://doi.org/10.3847/1538-3881/acb212 |
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