期刊
GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY VI
卷 9908, 期 -, 页码 -出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.2231488
关键词
Astronomical instrument; imaging camera; fully depleted CCD; sky survey
资金
- LBNL (through the Dark Energy Spectroscopic Instrument Project)
- National Optical Astronomy Observatory (NOAO)
- Director, Office of Science
- Office of High Energy Physics of the U.S. Department of Energy [DEACO205CH1123]
- National Energy Research Scientific Computing Center
- DOE Office of Science User Facility
- U.S. National Science Foundation
- Division of Astronomical Sciences [AST-0950945]
- Science and Technologies Facilities Council of the United Kingdom
- Gordon and Betty Moore Foundation
- Heising-Simons Foundation
- National Council of Science and Technology of Mexico
- DESI Member Institutions
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0950945] Funding Source: National Science Foundation
The Dark Energy Spectroscopic Instrument (DESI) is under construction and will be used to measure the expansion history of the Universe using the Baryon Acoustic Oscillation (BAO) technique and the growth of structure using redshift-space distortions (RSD). The spectra of 30 million galaxies over 14000 sq deg will be measured over the course of the experiment. In order to provide spectroscopic targets for the DESI survey, we are carrying out a three-band (g,r,z) imaging survey of the sky using the NOAO 4-m telescopes at Kitt Peak National Observatory (KPNO) and the Cerro Tololo Interamerican Observatory (CTIO). At KPNO, we will use an upgraded version of the Mayall 4m telescope prime focus camera, Mosaic3, to carry out a z-band survey of the Northern Galactic Cap at declinations delta >= +30 degrees. By equipping an existing Dewar with four 4kx4k fully depleted CCDs manufactured by the Lawrence Berkeley National Laboratory (LBNL), we increased the z-band throughput of the system by a factor of 1.6. These devices have the thickest active area fielded at a telescope. The Mosaic3 z-band survey will be complemented by g-band and r-band observations using the Bok telescope and 90 Prime imager on Kitt Peak. We describe the upgrade and performance of the Mosaic3 instrument and the scope of the northern survey.
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