5 March 2003 SNAP NIR detectors
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Abstract
The SuperNova/Acceleration Probe (SNAP) will measure precisely the cosmological expansion history over both the acceleration and deceleration epochs and thereby constrain the nature of the dark energy that dominates our universe today. The SNAP focal plane contains equal areas of optical CCDs and NIR sensors and an integral field spectrograph. Having over 150 million pixels and a field-of-view of 0.34 square degrees, the SNAP NIR system will be the largest yet constructed. With sensitivity in the range 0.9-1.7 μm, it will detect Type Ia supernovae between z = 1 and 1.7 and will provide follow-up precision photometry for all supernovae. HgCdTe technology, with a cut-off tuned to 1.7 μm, will permit passive cooling at 140 K while maintaining noise below zodiacal levels. By dithering to remove the effects of intrapixel variations and by careful attention to other instrumental effects, we expect to control relative photometric accuracy below a few hundredths of a magnitude. Because SNAP continuously revisits the same fields we will be able to achieve outstanding statistical precision on the photometry of reference stars in these fields, allowing precise monitoring of our detectors. The capabilities of the NIR system for broadening the science reach of SNAP are discussed.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gregory Tarle, Carl W. Akerlof, Greg Aldering, R. Amanullah, Pierre Astier, E. Barrelet, Christopher Bebek, Lars Bergstrom, John Bercovitz, Gary M. Bernstein, Manfred Bester, Alain Bonissent, C. R. Bower, Mark L. Brown, William C. Carithers, Eugene D. Commins, C. Day, Susana E. Deustua, Richard S. DiGennaro, Anne Ealet, Richard S. Ellis, Mikael Eriksson, Andrew Fruchter, Jean-Francois Genat, Gerson Goldhaber, Ariel Goobar, Donald E. Groom, Stewart E. Harris, Peter R. Harvey, Henry D. Heetderks, Steven E. Holland, Dragan Huterer, Armin Karcher, Alex G. Kim, William F. Kolbe, B. Krieger, R. Lafever, J. Lamoureux, Michael L. Lampton, Michael E. Levi, Daniel S. Levin, Eric V. Linder, Stewart C. Loken, Roger Malina, R. Massey, Ramon Miquel, Timothy McKay, Shawn P. McKee, E. Moertsell, N. Mostek, Stuart Mufson, J. A. Musser, Peter E. Nugent, Hakeem M. Oluseyi, Reynald Pain, Nicholas P. Palaio, David H. Pankow, Saul Perlmutter, R. Pratt, Eric Prieto, Alexandre Refregier, Jason Rhodes, Kem Edward Robinson, N. Roe, Michael S. Schubnell, Michael Sholl, G. Smadja, George F. Smoot, Anthony Spadafora, Andrew D. Tomasch, D. Vincent, H. von der Lippe, J.-P. Walder, Guobin Wang, "SNAP NIR detectors", Proc. SPIE 4850, IR Space Telescopes and Instruments, (5 March 2003); doi: 10.1117/12.461774; https://doi.org/10.1117/12.461774
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