From: Alex Conley (aconley@panisse.lbl.gov)
Date: Tue Apr 22 2003 - 09:50:06 PDT
This is something you are probably already aware of, but I thought
it was worth pointing out: Another difference between the way
we do analysis and the way the Hi-z team does analysis is that
they effectively fix alpha from low redshift SNe and then use that
for all objects, while we include alpha as a nuisance parameter in
our full fit.
Of course, since they don't use stretch, they aren't really using alpha,
but MLCS uses a correction delta which is based on a training set of low-z
SNe, and in Riess 98 they use a delta_m15 correction with a slope fixed by
Phillips 98, which is a low-z sample.
Do we have any idea what this does to the fit contours?
Alex
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