The Astronomical Journal (Jan 2024)
Archetype-based Redshift Estimation for the Dark Energy Spectroscopic Instrument Survey
- Abhijeet Anand,
- Julien Guy,
- Stephen Bailey,
- John Moustakas,
- J. Aguilar,
- S. Ahlen,
- A. S. Bolton,
- A. Brodzeller,
- D. Brooks,
- T. Claybaugh,
- S. Cole,
- A. de la Macorra,
- Biprateep Dey,
- K. Fanning,
- J. E. Forero-Romero,
- E. Gaztañaga,
- S. Gontcho A Gontcho,
- G. Gutierrez,
- K. Honscheid,
- C. Howlett,
- S. Juneau,
- D. Kirkby,
- T. Kisner,
- A. Kremin,
- A. Lambert,
- M. Landriau,
- L. Le Guillou,
- M. Manera,
- A. Meisner,
- R. Miquel,
- E. Mueller,
- G. Niz,
- N. Palanque-Delabrouille,
- W. J. Percival,
- C. Poppett,
- F. Prada,
- A. Raichoor,
- M. Rezaie,
- G. Rossi,
- E. Sanchez,
- E. F. Schlafly,
- D. Schlegel,
- M. Schubnell,
- D. Sprayberry,
- G. Tarlé,
- C. Warner,
- B. A. Weaver,
- R. Zhou,
- H. Zou
Affiliations
- Abhijeet Anand
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- Julien Guy
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- Stephen Bailey
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- John Moustakas
- ORCiD
- Department of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USA
- J. Aguilar
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- S. Ahlen
- ORCiD
- Physics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215, USA
- A. S. Bolton
- ORCiD
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- A. Brodzeller
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]; Department of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USA
- D. Brooks
- Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UK
- T. Claybaugh
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- S. Cole
- ORCiD
- Institute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK
- A. de la Macorra
- ORCiD
- Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, México
- 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
- K. Fanning
- ORCiD
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University , Menlo Park, CA 94305, USA; SLAC National Accelerator Laboratory , Menlo Park, CA 94305, USA
- J. E. Forero-Romero
- ORCiD
- Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, Colombia; Observatorio Astronómico, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá, Colombia
- E. Gaztañaga
- Institut d’Estudis Espacials de Catalunya (IEEC) , 08034 Barcelona, Spain; Institute of Cosmology and Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX, UK; Institute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona, Spain
- S. Gontcho A Gontcho
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- G. Gutierrez
- Fermi National Accelerator Laboratory , PO Box 500, Batavia, IL 60510, 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, 43210 OH, USA
- C. Howlett
- ORCiD
- School of Mathematics and Physics, University of Queensland , 4072, Australia
- S. Juneau
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- D. Kirkby
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, 92697, USA
- T. Kisner
- 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]
- A. Lambert
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- 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), FR-75005 Paris, France
- M. Manera
- ORCiD
- Departament de Física, Serra Húnter, Universitat Autònoma de Barcelona , 08193 Bellaterra (Barcelona), Spain; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, 08193 Bellaterra Barcelona, Spain
- A. Meisner
- ORCiD
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- R. Miquel
- Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, 08193 Bellaterra Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, 08010 Barcelona, Spain
- E. Mueller
- Department of Physics and Astronomy, University of Sussex , Brighton BN1 9QH, UK
- G. Niz
- ORCiD
- Departamento de Física, Universidad de Guanajuato—DCI , C.P. 37150, Leon, Guanajuato, México; Instituto Avanzado de Cosmología A.C. , San Marcos 11—Atenas 202. Magdalena Contreras, 10720. Ciudad de México, México
- N. Palanque-Delabrouille
- ORCiD
- 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
- ORCiD
- 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]
- M. Rezaie
- ORCiD
- Department of Physics, Kansas State University , 116 Cardwell Hall, Manhattan, KS 66506, USA
- G. Rossi
- Department of Physics and Astronomy, Sejong University , Seoul, 143-747, Republic of Korea
- E. Sanchez
- ORCiD
- CIEMAT , Avenida Complutense 40, E-28040 Madrid, Spain
- E. F. Schlafly
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- D. Schlegel
- 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
- D. Sprayberry
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- G. Tarlé
- ORCiD
- University of Michigan , Ann Arbor, MI 48109, USA
- C. Warner
- Department of Astronomy, University of Florida , 211 Bryant Space Science Center, Gainesville, FL 32611, USA
- B. A. Weaver
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- R. Zhou
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA ; [email protected]
- 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/ad60c2
- Journal volume & issue
-
Vol. 168,
no. 3
p. 124
Abstract
We present a computationally efficient galaxy archetype-based redshift estimation and spectral classification method for the Dark Energy Survey Instrument (DESI) survey. The DESI survey currently relies on a redshift fitter and spectral classifier using a linear combination of principal component analysis–derived templates, which is very efficient in processing large volumes of DESI spectra within a short time frame. However, this method occasionally yields unphysical model fits for galaxies and fails to adequately absorb calibration errors that may still be occasionally visible in the reduced spectra. Our proposed approach improves upon this existing method by refitting the spectra with carefully generated physical galaxy archetypes combined with additional terms designed to absorb data reduction defects and provide more physical models to the DESI spectra. We test our method on an extensive data set derived from the survey validation (SV) and Year 1 (Y1) data of DESI. Our findings indicate that the new method delivers marginally better redshift success for SV tiles while reducing catastrophic redshift failure by 10%–30%. At the same time, results from millions of targets from the main survey show that our model has relatively higher redshift success and purity rates (0.5%–0.8% higher) for galaxy targets while having similar success for QSOs. These improvements also demonstrate that the main DESI redshift pipeline is generally robust. Additionally, it reduces the false-positive redshift estimation by 5%−40% for sky fibers. We also discuss the generic nature of our method and how it can be extended to other large spectroscopic surveys, along with possible future improvements.
Keywords
- Galaxy spectroscopy
- Astronomical methods
- Redshift surveys
- Astronomy software
- Astronomy data analysis
