From: Alex Conley (aconley@panisse.lbl.gov)
Date: Fri Dec 19 2003 - 11:16:41 PST
> Does this applies to all BVRI filters?
It applies to UBVRI if they follow the Bessel passbands.
> what is the color code in this plot? I could not figure it out. Anyway I
> see that the effect is very small, which is expected since both observed
> and restframe filters are in the "wrong" units, so the total effect is
> probably averaged out. This gives me confidence in the fact that this is
> probably not going to change the results of the paper.
Sorry. What is shown is Kold - Knew (recall that K is subtracted from the
magnitudes to get the correct one). The linestyles represent different
redshifts, as in the legend. The blue line is the rest frame B band and
the red line is the rest frame V band. As you can see, the B band is
affected considerably more than the V band.
>
> > This was discovered due to a note in Jha's thesis. I ended up emailing
> > Mike Bessel directly to confirm this. So you should look up Bessel
> > (1990), compare it to your filter curve, and if it the one you are using
> > you have a (minor) problem -- but one that isn't too hard to fix.
> > Just divide your filter file by lambda, renormalize, and redo all your
> > K-corrections.
> >
>
> I checked it in Jha's thesis ( I guess it is the note in page 156). This
> is scaring more for the IR data, when correcting from J-band to I-band,
> since I suspect the J-band is done in the "right" way.
> But I need to check how big the effect will be.
> Thanks for having pointed this out.
> Cheers
>
> Serena
>
>
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