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9 August 2016 Mosaic3: a red-sensitive upgrade for the prime focus camera at the Mayall 4m telescope
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Abstract
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 δ≥+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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Arjun Dey, David Rabinowitz, Armin Karcher, Chris Bebek, Charles Baltay, David Sprayberry, Frank Valdes, Bob Stupak, John Donaldson, Will Emmet, Tom Hurteau, Behzad Abareshi, Bob Marshall, Dustin Lang, Mike Fitzpatrick, Phil Daly, Dick Joyce, David Schlegel, Heidi Schweiker, Lori Allen, Bob Blum, and Michael Levi "Mosaic3: a red-sensitive upgrade for the prime focus camera at the Mayall 4m telescope", Proc. SPIE 9908, Ground-based and Airborne Instrumentation for Astronomy VI, 99082C (9 August 2016); https://doi.org/10.1117/12.2231488
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