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Session 7 - Cosmology and Cosmological Parameters.
Display session, Monday, January 15
North Banquet Hall, Convention Center

[7.04] High-Redshift Supernova Searching to Study q_0, \Lambda, Ømega_0, and H_0: First Results from 7 Supernovae at Redshifts z \approx 0.35 -- 0.5

A. Kim, S. Deustua, S. Gabi, G. Goldhaber, D. Groom, I. Hook, M. Kim, C. Pennypacker, S. Perlmutter (LBNL/CfPA, Berkeley), A. Goobar (U.Stockholm), R. Pain (IN2P3), R. Ellis, R. McMahon (IoA), B. Boyle, P. Bunclark, D. Carter, M. Irwin (RGO), A. V. Filippenko, T. Matheson (U.C. Berkeley), K. Glazebrook (AAO), M. Dopita, J. Mould (MSSSO, ANU), W. Couch (UNSW)

Our search for high-redshift type Ia supernovae has so far discovered seven supernovae. Using a ``batch'' search strategy, almost all were discovered before maximum light and were observed over the peak of their light curves. The spectra and light curves indicate that almost all were type Ia supernovae at redshifts z = 0.35 -- 0.5. These high-redshift supernovae can provide a distance indicator and ``standard clock'' to study the cosmological parameters q_0, \Lambda, Ømega_0, and H_0. This presentation will present observation strategies and rates, analysis and calibration issues, the sources of measurement uncertainty, and some cosmological implications of these first high-redshift supernovae from our ongoing search.

Program listing for Monday