The Astronomical Journal (Jan 2024)
Measuring Fiber Positioning Accuracy and Throughput with Fiber Dithering for the Dark Energy Spectroscopic Instrument
- E. F. Schlafly,
- D. Schlegel,
- S. BenZvi,
- A. Raichoor,
- J. E. Forero-Romero,
- J. Aguilar,
- S. Ahlen,
- S. Bailey,
- A. Bault,
- D. Brooks,
- T. Claybaugh,
- K. Dawson,
- A. de la Macorra,
- Arjun Dey,
- P. Doel,
- E. Gaztañaga,
- S. Gontcho A Gontcho,
- J. Guy,
- C. Hahn,
- K. Honscheid,
- J. Jimenez,
- S. Kent,
- D. Kirkby,
- T. Kisner,
- A. Kremin,
- A. Lambert,
- M. Landriau,
- M. E. Levi,
- M. Manera,
- P. Martini,
- A. Meisner,
- R. Miquel,
- J. Moustakas,
- A. D. Myers,
- J. Nie,
- N. Palanque-Delabrouille,
- W. J. Percival,
- C. Poppett,
- F. Prada,
- D. Rabinowitz,
- M. Rezaie,
- G. Rossi,
- E. Sanchez,
- M. Schubnell,
- R. Sharples,
- J. Silber,
- G. Tarlé,
- B. A. Weaver,
- Z. Zhou,
- H. Zou,
- DESI Collaboration
Affiliations
- 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
- 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. Raichoor
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, 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
- J. Aguilar
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- S. Ahlen
- ORCiD
- Physics Deptartment, Boston University , 590 Commonwealth Avenue, Boston, MA 02215, USA
- S. Bailey
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- A. Bault
- ORCiD
- Department of Physics and Astronomy, University of California , Irvine, 92697, USA
- D. Brooks
- ORCiD
- 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
- 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
- ORCiD
- Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, México
- Arjun Dey
- ORCiD
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- P. Doel
- Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UK
- E. Gaztañaga
- Institut d’Estudis Espacials de Catalunya (IEEC) , 08034 Barcelona, Spain; Institute of Cosmology & 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
- J. Guy
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- C. Hahn
- ORCiD
- Department of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, 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
- J. Jimenez
- ORCiD
- Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, 08193 Bellaterra Barcelona, Spain
- S. Kent
- ORCiD
- Department of Astronomy and Astrophysics, University of Chicago , 5640 South Ellis Avenue, Chicago, IL 60637, USA; Fermi National Accelerator Laboratory , P.O. Box 500, Batavia, IL 60510, 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
- A. Kremin
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- A. Lambert
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- M. Landriau
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- M. E. Levi
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- M. Manera
- ORCiD
- Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology , Campus UAB, 08193 Bellaterra Barcelona, Spain; Departament de Física, Serra Húnter, Universitat Autònoma de Barcelona , 08193 Bellaterra (Barcelona), Spain
- P. Martini
- ORCiD
- Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; Department of Astronomy, The Ohio State University , 4055 McPherson Laboratory, 140 W 18th Avenue, Columbus, OH 43210, USA
- A. Meisner
- ORCiD
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- R. Miquel
- ORCiD
- 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
- J. Moustakas
- ORCiD
- Department of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USA
- A. D. Myers
- Department of Physics & Astronomy, University of Wyoming , 1000 E. University, Dept. 3905, Laramie, WY 82071, USA
- J. Nie
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
- N. Palanque-Delabrouille
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA; 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
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA; Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720, USA
- F. Prada
- ORCiD
- Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, Spain
- D. Rabinowitz
- ORCiD
- Physics Department, Yale University , P.O. Box 208120, New Haven, CT 06511, USA
- 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
- M. Schubnell
- Department of Physics, University of Michigan , Ann Arbor, MI 48109, USA
- R. 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
- J. Silber
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- G. Tarlé
- ORCiD
- Department of Physics, University of Michigan , Ann Arbor, MI 48109, USA
- B. A. Weaver
- NSF’s NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719, USA
- Z. Zhou
- ORCiD
- 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
- DESI Collaboration
- DOI
- https://doi.org/10.3847/1538-3881/ad4d8c
- Journal volume & issue
-
Vol. 168,
no. 1
p. 35
Abstract
Highly multiplexed, fiber-fed spectroscopy is enabling surveys of millions of stars and galaxies. The performance of these surveys depends on accurately positioning fibers in the focal plane to capture target light. We describe a technique to measure the positioning accuracy of fibers by dithering fibers slightly around their ideal locations. This approach also enables measurement of the total system throughput and point-spread function delivered to the focal plane. We then apply this technique to observations from the Dark Energy Survey Instrument (DESI), and demonstrate that DESI positions fibers to within 0.″08 of their targets (5% of a fiber diameter) and achieves a system throughput within about 7% of expectations.
Keywords
