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Title: THE DARK ENERGY CAMERA

The Dark Energy Camera is a new imager with a 2.°2 diameter field of view mounted at the prime focus of the Victor M. Blanco 4 m telescope on Cerro Tololo near La Serena, Chile. The camera was designed and constructed by the Dark Energy Survey Collaboration and meets or exceeds the stringent requirements designed for the wide-field and supernova surveys for which the collaboration uses it. The camera consists of a five-element optical corrector, seven filters, a shutter with a 60 cm aperture, and a charge-coupled device (CCD) focal plane of 250 μm thick fully depleted CCDs cooled inside a vacuum Dewar. The 570 megapixel focal plane comprises 62 2k × 4k CCDs for imaging and 12 2k × 2k CCDs for guiding and focus. The CCDs have 15 μm × 15 μm pixels with a plate scale of 0.″263 pixel{sup −1}. A hexapod system provides state-of-the-art focus and alignment capability. The camera is read out in 20 s with 6–9 electron readout noise. This paper provides a technical description of the camera's engineering, construction, installation, and current status.
Authors:
; ; ; ; ;  [1] ;  [2] ; ;  [3] ; ;  [4] ; ;  [5] ;  [6] ;  [7] ;  [8] ; ;  [9] ;  [10] ;  [11] more »; ; « less
  1. Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States)
  2. Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210 (United States)
  3. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena (Chile)
  4. Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT (United Kingdom)
  5. Institut de Física d’Altes Energies, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona (Spain)
  6. Department of Physics, The Ohio State University, Columbus, OH 43210 (United States)
  7. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 (United States)
  8. Carnegie Observatories, 813 Santa Barbara St., Pasadena, CA 91101 (United States)
  9. Department of Physics, University of Michigan, Ann Arbor, MI 48109 (United States)
  10. Centro de Investigaciones Energèticas, Medioambientales y Tecnológicas (CIEMAT), Madrid (Spain)
  11. Institut de Ciències de l’Espai, IEEC-CSIC, Campus UAB, Facultat de Ciències, Torre C5 par-2, E-08193 Bellaterra, Barcelona (Spain)
Publication Date:
OSTI Identifier:
22520108
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal (Online); Journal Volume: 150; Journal Issue: 5; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ALIGNMENT; APERTURES; CAMERAS; CHARGE-COUPLED DEVICES; COSMOLOGY; DESIGN; FILTERS; IMAGES; NOISE; NONLUMINOUS MATTER; PHOTOMETERS; READOUT SYSTEMS; SUPERNOVAE; TELESCOPES