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A. Kim (LBNL), G. Aldering (LBNL), P. Astier (LPNHE), A. Baden (Maryland), C. Bebek (Cornell), L. Bergstrom (Stockholm), D. Curtis (Berkeley), S. Deustua (LBNL), W. Edwards (LBNL), R. Ellis (CalTech), A. Fruchter (STSI), B. Frye (LBNL), J.F. Genat (LPNHE), G. Goldhaber (Berkeley), A. Goobar (Stockholm), J. Goodman (Maryland), J. Graham (Berkeley), D. Hardin (LPNHE), S. Harris (Berkeley), P. Harvey (Berkeley), H. Heetderks (Berkeley), S. Holland (LBNL), I. Hook (Edinburgh), D. Huterer (Chicago), D. Kasen (LBNL), R. Knop (LBNL), R. Lafever (LBNL), M. Lampton (Berkeley), M. Levi (LBNL), J-M. Levy (LPNHE), C. Lidman (ESO), R. Lin (Berkeley), S. Loken (LBNL), M. Metzger (CalTech), A. Mourao (CENTRA), P. Nugent (LBNL), R. Pain (LPNHE), D. Pankow (Berkeley), C. Pennypacker (Berkeley), S. Perlmutter (LBNL), J. Rich (CEA), K. Robinson (LBNL), K. Schamahneche (LPNHE), A. Spadafora (Berkeley), G. Smoot (Berkeley), G. Sullivan (Maryland), SNAP Collaboration
The Supernova / Acceleration Probe (SNAP) is a space experiment to measure the properties of the accelerating universe and study both the dark energy and the dark matter of the universe. Each year, SNAP will discover and obtain high-quality data for ~2000 Type Ia supernovae in the redshift range 0.1 < z <1.7. The Hubble diagram of these calibrated candles will determine the cosmological parameters with high precision: mass density (\OmegaM) to ±.02, vacuum energy density (\Omega\Lambda) to ±.05, and curvature (\OmegaK) to ±.06. The data set can test the nature of the ``dark energy'' that is accelerating the expansion of the universe by measuring the ratio of the dark energy's pressure to its density to ± 0.05, and by studying this ratio's time dependence. We present an instrument suite which is optimized to meet our stringent observational requirements. This project is supported in part by the US Department of Energy and by the National Science Foundation.