The Astronomical Journal (Jan 2023)
The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument
- 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
Affiliations
- J. Guy
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- S. Bailey
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- A. Kremin
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- Shadab Alam
- ORCiD
- Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
- D. M. Alexander
- ORCiD
- Centre for Extragalactic Astronomy, Department of Physics, Durham University , South Road, Durham, DH1 3LE, UK
- C. Allende Prieto
- ORCiD
- Instituto 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, Spain
- S. BenZvi
- ORCiD
- Department of Physics & Astronomy, University of Rochester , 206 Bausch and Lomb Hall, P.O. Box 270171, Rochester, NY 14627-0171, USA
- A. S. Bolton
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- D. Brooks
- ORCiD
- Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UK
- E. Chaussidon
- ORCiD
- IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France
- A. P. Cooper
- ORCiD
- Institute of Astronomy and Department of Physics, National Tsing Hua University , 101 Kuang-Fu Road Sec. 2, Hsinchu 30013, Taiwan
- K. Dawson
- ORCiD
- Department of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USA
- A. de la Macorra
- Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, México
- A. Dey
- ORCiD
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Biprateep Dey
- ORCiD
- Department of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh , 3941 O’Hara Street, Pittsburgh, PA 15260, USA
- G. Dhungana
- Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USA
- D. J. Eisenstein
- ORCiD
- Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- A. Font-Ribera
- ORCiD
- Institut de Física dAltes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, E-08193 Bellaterra Barcelona, Spain
- J. E. Forero-Romero
- ORCiD
- Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, Colombia
- E. Gaztañaga
- ORCiD
- Institut 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, Spain
- S. Gontcho A Gontcho
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- D. Green
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, CA 92697, USA
- K. Honscheid
- Center 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, USA
- M. Ishak
- ORCiD
- Department of Physics, The University of Texas at Dallas , Richardson, TX 75080, USA
- R. Kehoe
- ORCiD
- Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USA
- D. Kirkby
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, CA 92697, USA
- T. Kisner
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- Sergey E. Koposov
- ORCiD
- Institute for Astronomy, University of Edinburgh , Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
- Ting-Wen Lan
- ORCiD
- Graduate Institute of Astrophysics and Department of Physics, National Taiwan University , No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan
- M. Landriau
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- L. Le Guillou
- ORCiD
- Sorbonne Université , CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), F-75005 Paris, France
- Michael E. Levi
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- C. Magneville
- IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France
- Christopher J. Manser
- ORCiD
- Department of Physics, University of Warwick , Coventry, CV4 7AL, UK
- P. Martini
- ORCiD
- Center 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, USA
- Aaron M. Meisner
- ORCiD
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- R. Miquel
- ORCiD
- Institut 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, Spain
- J. Moustakas
- ORCiD
- Department of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USA
- Adam D. Myers
- Department of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USA
- Jeffrey A. Newman
- ORCiD
- Department of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh , 3941 O’Hara Street, Pittsburgh, PA 15260, USA
- Jundan Nie
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of China
- N. Palanque-Delabrouille
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]; IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France
- W. J. Percival
- ORCiD
- Department 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, Canada
- C. Poppett
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]; 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, USA
- F. Prada
- Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, Spain
- A. Raichoor
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- C. Ravoux
- IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France
- A. J. Ross
- Center 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, USA
- E. F. Schlafly
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- D. Schlegel
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- M. Schubnell
- Department of Physics, University of Michigan , Ann Arbor, MI 48109, USA; University of Michigan , Ann Arbor, MI 48109, USA
- Ray M. Sharples
- ORCiD
- Centre 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, UK
- Gregory Tarlé
- ORCiD
- University of Michigan , Ann Arbor, MI 48109, USA
- B. A. Weaver
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Christophe Yéche
- ORCiD
- IRFU, CEA, Université Paris-Saclay , F-91191 Gif-sur-Yvette, France
- Rongpu Zhou
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- Zhimin Zhou
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of China
- H. Zou
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People’s Republic of China
- DOI
- https://doi.org/10.3847/1538-3881/acb212
- Journal volume & issue
-
Vol. 165,
no. 4
p. 144
Abstract
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.
Keywords
