From: Michael Wood-Vasey (wmwood-vasey@lbl.gov)
Date: Sun Mar 16 2003 - 11:48:10 PST
On Sun, Mar 16, 2003 at 01:39:03PM -0600, Robert A. Knop Jr. wrote:
> On Sun, Mar 16, 2003 at 11:11:24AM -0800, Alex Conley wrote:
> > I was thinking about how you are using cmb vs. heliocentric redshifts,
> > and I think you are doing it wrong in snminuit. You definitely want
> > the K-corrections to be done heliocentrically, but the stretch
> > fits should be done in the CMB frame.
>
> No.
>
> Time dilation is time dilation, whether it comes from cosmology or from
> a doppler shift. So far as the fit goes, it doesn't *care* where in the
> universe the SN is, it only case how much total time dilation there is.
For what it's worth, the invisible lurker agrees with Rob.
Not that you couldn't do it in the CMB frame, but the conversions to
get there and do it properly would give you the same answer as doing
it heliocentrically.
- Michael
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