1. SNAP NIR detectors
- Author
-
Eric V. Linder, Guobin Wang, Saul Perlmutter, Steven E. Holland, S. Harris, Dragan Huterer, Greg Aldering, Eric Prieto, R. Lafever, A. L. Spadafora, Jason Rhodes, J.F. Genat, George F. Smoot, Michael Levi, H. von der Lippe, S. C. Loken, Mark L. Brown, Alex G. Kim, Anne Ealet, Pierre Astier, B. Krieger, Daniel Levin, William F. Kolbe, Michael Schubnell, Ariel Goobar, R. DiGennaro, Peter Harvey, E. Barrelet, Richard S. Ellis, Alain Bonissent, Alexandre Refregier, Michael Sholl, Timothy A. McKay, David H. Pankow, R. Pratt, E. Moertsell, Michael Lampton, Susana E. Deustua, H. Heetderks, Rahman Amanullah, Donald E. Groom, M. Eriksson, Nicholas P. Palaio, Manfred Bester, Carl W. Akerlof, K. Robinson, Ramon Miquel, Peter Nugent, J.-P. Walder, Gary Bernstein, Shawn McKee, S. Mufson, Gerson Goldhaber, William Carithers, Richard Massey, Roger F. Malina, Andrew S. Fruchter, A. D. Tomasch, D. Vincent, J. I. Lamoureux, Armin Karcher, C. R. Bower, Gregory Tarle, Natalie A. Roe, J. A. Musser, Lars Bergström, C. T. Day, G. Smadja, Hakeem M. Oluseyi, Chris Bebek, Eugene D. Commins, Reynald Pain, J. Bercovitz, Nick Mostek, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Flores, Sylvie
- Subjects
Astrophysics::High Energy Astrophysical Phenomena ,media_common.quotation_subject ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,[SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph] ,01 natural sciences ,[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,010309 optics ,Photometry (optics) ,Acceleration ,Integral field spectrograph ,Optics ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,media_common ,Physics ,Zodiacal light ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,business.industry ,Near-infrared spectroscopy ,Universe ,Cardinal point ,[PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Dark energy ,business - 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.
- Published
- 2003
- Full Text
- View/download PDF