From: Alex Conley (aconley@panisse.lbl.gov)
Date: Fri Jan 02 2004 - 15:25:02 PST
Alex (Kim) is right -- and it isn't a coincidence. Bessel tabulates
lambda*R instead of R precisely so that you can work directly with energy
(f_lambda). There's nothing wrong with using lambda*R, you just need to
make sure that you realize that you are doing it and write the integral
correctly. It is for this reason that many of the people I have talked to
about this have thought that I'm trying to re-open the energy vs. photons
argument, when in fact I am not.
Alex
On Fri, 2 Jan 2004, Alex Kim wrote:
> A small addendum to Alex's e-mail. Interestingly enough, if you
> mistakenly assume that the Johnson-Cousins system is energy based AND
> you mistakenly take Bessell's curves to be R, you get the correct
> Johnson-Cousins (count-based) K-correction. So the K-corrections we
> used in the days of yore were "correct"!
>
> Alex
>
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