From: Alex Conley (aconley@panisse.lbl.gov)
Date: Wed Mar 10 2004 - 09:58:45 PST
> For the difference you found between the results obtained using Rob's
> templates and mine, they agree with what have been already pointed out by
> Chris for K_JI. These differences are in fact within the quoted uncertainty
> of 0.05. I believe also that Rob's work in the I-band is probably not as
> accurate as in B,V and R, nor as in the Nobili et al. 2003 paper, since it
> was not a relevant band for the Knop et al paper (Rob, do you agree with
> this?). I any case, the quoted uncertainty (0.05) takes care of these
> differences, giving us confidence in what we are doing.
Things are not so simple. I'm willing to grant that you may have better I
band, but the B and V band don't agree either. Attached is a B->B band
comparison plot, which also disagrees by about 0.05 magnitudes (stretch 1,
redshift 0.05).
This is not a minor difference. Using your B and V K-corrections when
fitting cosmologies results in a shift along the short axis of the
cosmological parameters by around 1 sigma. If we have to double the
error bar size of all of our cosmological results that we have ever
published, then people probably wouldn't pay that much attention to
our results.
Alex
This archive was generated by hypermail 2.1.4 : Wed Mar 10 2004 - 09:58:48 PST