From: Eric Linder (evlinder@lbl.gov)
Date: Thu Jan 26 2006 - 15:34:47 PST
See comments in line below. -Eric
On Jan 26, 2006, at 1:10 PM, Saul Perlmutter wrote:
> Our Cycle 14 program has now proven a new extremely efficient
> approach to obtain z>1 dust-free Type Ia supernovae, and we here
> propose to capitalize on this new technique . We will collect a
> total sample of ~20 z>1 SNe Ia in cluster ellipticals, yielding
> dark energy measurements that do not suffer from the major
> systematic uncertainty at these redshifts, that of the extinction
> correction with a prior. By targeting massive galaxy clusters at
> z>1, we obtain a five-times [CHECK] higher efficiency in detection
> of Type Ia supernovae in elliptical galaxies, and provide a well-
> understood host galaxy environment. These same deep cluster images
> then also yield fundamental calibrations required for future weak
> lensing and Sunyaev-Zel'dovich measurements of dark energy, as well
> as an entire program of cluster studies. The data will make
> possible a factor of two improvement on supernova constraints on
> dark energy
> time variation,
Delete "time variation" and say "dynamics". The more technical
phrase would be "equation of state phase space", but dynamics is
pithier. The factor of two is in contour area not in either w_0 or
w' alone.
> and much larger improvement in systematic uncertainty, taking
> advantage of the uniquely well-controlled host environment that
> clusters provide. They will provide both a cluster dataset and a
> SN Ia data set that will be a longstanding scientific resource.
>
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