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A. Conley, G. Goldhaber (LBNL, UC Berkeley), L. Wang, G. Aldering (LBNL), R. Amanullah (Stockholm), P. Antilogus, P. Astier (LPNHE Paris), G. Blanc (Padova), M.S. Burns (Colorado College), S.E. Deustua (LBNL), M. Doi (University of Tokyo), R. Ellis (CalTech), S. Fabbro (Lisbon), V. Fadeyev (LBNL), G. Folatelli (Stockholm), A.S. Fruchter (STScI), G. Garavini (Stockholm), R. Gibbons (LBNL), A. Goobar (Stockholm), D. Groom (LBNL), D. Hardin (LPNHE Paris), I. Hook (Oxford), D.A. Howell (Toronoto), M. Irwin (IOA Cambridge), D. Kasen (UC Berkeley, LBNL), A.G. Kim (LBNL), R.A. Knop (Vanderbilt), B.C. Lee (LBNL), C. Lidman (ESO), R. McMahon (IOA Cambridge), J. Mendez (ING), S. Nobili (Stockholm), P.E. Nugent (LBNL), R. Pain (LPNHE Paris), N. Panagia (STScI), C.R. Pennypacker, S. Perlmutter, V. Prasad (LBNL), R. Quimby (University of Texas), J. Raux (LPNHE Paris), N. Regnault (LBNL), P. Ruiz-Lapuente (University of Barcelona), G. Sainton (LPNHE Paris), B. Schaefer (University of Texas), K. Schahmaneche (LPNHE Paris), E. Smith (Vanderbilt), A.L. Spadafora (LBNL), V. Stanishev (Stockholm), M. Sullivan (Toronto), N. Walton (IOA Cambridge), W.M. Wood-Vasey (UC Berkeley, LBNL), N. Yasuda (NAOJ)
We present \Omegam,\Omega\Lambda results based on a recently developed technique for analyzing the lightcurves of Type Ia supernovae. This technique (CMAGIC, for Color-Magnitude Intercept Calibration (Wang et al. 2003)) is based on the empirical uniformity of SNe Ia color-magnitude diagrams after maximum light, and has advantages over maximum-magnitude fits. In particular, CMAGIC is less affected by host-galaxy dust extinction. This result, based on 12 high redshift SNe Ia, provides a powerful check on previous cosmological results using Type Ia supernovae that have shown that the expansion of the universe is accelerating.
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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.