The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument
J. GuyLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]S. BaileyLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]Anthony KreminLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]Shadab AlamInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKD. M. AlexanderCentre for Extragalactic Astronomy, Department of Physics, Durham University, South Road, Durham, DH1 3LE, UKCarlos Allende PrietoInstituto 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, SpainS. BenZviDepartment of Physics & Astronomy, University of Rochester, 206 Bausch and Lomb Hall, P.O. Box 270171, Rochester, NY 14627-0171, USAA. BoltonNSF’s NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USADavid BrooksDepartment of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UKE. ChaussidonIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceAndrew P. CooperInstitute of Astronomy and Department of Physics, National Tsing Hua University, 101 Kuang-Fu Road Sec. 2, Hsinchu 30013, TaiwanKyle 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 NOIRLab, 950 N. Cherry Ave., 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, USADaniel J. EisensteinCenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USAAndreu Font-RiberaInstitut de Física dAltes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, E-08193 Bellaterra Barcelona, SpainJ. E. Forero-RomeroDepartamento de Física, Universidad de los Andes, Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, ColombiaE. GaztañagaInstitut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, SpainSatya Gontcho A GontchoLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]D. GreenDepartment of Physics and Astronomy, University of California, Irvine, CA 92697, USAK. HonscheidCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USAMustapha IshakDepartment of Physics, The University of Texas at Dallas, Richardson, TX 75080, USAR. KehoeDepartment of Physics, Southern Methodist University, 3215 Daniel Avenue, Dallas, TX 75275, USAD. KirkbyDepartment of Physics and Astronomy, University of California, Irvine, CA 92697, USATheodore KisnerLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]S. E. KoposovInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UKTing-Wen LanGraduate Institute of Astrophysics and Department of Physics, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, TaiwanMartin LandriauLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]L. Le GuillouSorbonne Université, CNRS/IN2P3, Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), F-75005 Paris, FranceM. E. LeviLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]C. MagnevilleIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceChristopher J. ManserDepartment of Physics, University of Warwick, Coventry, CV4 7AL, UKP. MartiniCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USAAaron MeisnerNSF’s NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAR. MiquelInstitució Catalana de Recerca i Estudis Avançats, Passeig de Lluís Companys, 23, E-08010 Barcelona, SpainJohn MoustakasDepartment of Physics and Astronomy, Siena College, 515 Loudon Road, Loudonville, NY 12211, USAAdam D. MyersDepartment of Physics & Astronomy, University of Wyoming, 1000 E. University, Dept. 3905, Laramie, WY 82071, USAJeffrey A. NewmanDepartment of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, 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, FranceWill J. PercivalDepartment of Physics and Astronomy, University of Waterloo, 200 University Avenue W, Waterloo, ON N2L 3G1, CanadaClaire PoppettLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]Francisco PradaInstituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, s/n, E-18008 Granada, SpainAnand RaichoorLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]C. RavouxIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceA.J. RossCenter for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USAEdward F. SchlaflySpace Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USADavid J. SchlegelLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]M. SchubnellDepartment of Physics, University of Michigan, Ann Arbor, MI 48109, USAR. M. SharplesCentre for Advanced Instrumentation, Department of Physics, Durham University, South Road, Durham DH1 3LE, UKG. TarléUniversity of Michigan, Ann Arbor, MI 48109, USAB. A. WeaverNSF’s NOIRLab, 950 N. Cherry Ave., Tucson, AZ 85719, USAChristophe YècheIRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, FranceRongpu ZhouLawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA; [email protected]Zhimin 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 China
2023en
ABI
Аннотация
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.
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