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.
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Arjun Dey, Arjun Dey, David Rabinowitz, David Rabinowitz, Armin Karcher, Armin Karcher, Chris Bebek, Chris Bebek, Charles Baltay, Charles Baltay, David Sprayberry, David Sprayberry, Frank Valdes, Frank Valdes, Bob Stupak, Bob Stupak, John Donaldson, John Donaldson, Will Emmet, Will Emmet, Tom Hurteau, Tom Hurteau, Behzad Abareshi, Behzad Abareshi, Bob Marshall, Bob Marshall, Dustin Lang, Dustin Lang, Mike Fitzpatrick, Mike Fitzpatrick, Phil Daly, Phil Daly, Dick Joyce, Dick Joyce, David Schlegel, David Schlegel, Heidi Schweiker, Heidi Schweiker, Lori Allen, Lori Allen, Bob Blum, Bob Blum, Michael Levi, 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); doi: 10.1117/12.2231488; https://doi.org/10.1117/12.2231488
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