From: Alex Conley (aconley@panisse.lbl.gov)
Date: Tue Mar 09 2004 - 18:56:34 PST
Hello Serena,
I have run my K-corrections on the same dates as yours, and I have to
report that I also get a rather different result than you do. This is
displayed graphically for the z=0.05 case in the first attachment (I got
the line styles wrong in the legend-- sorry). Shown are your values, my
values, and the values I get with my code and filter curves using your
uberspectra. The values that I get with your uberspectra are very similar
to yours. The difference is probably due to one or both of the following:
(i) I assumed that the dates were observer frame, and you used rest
frame.
(ii) I am using versions of Bessell's filters with the linear function
removed and you are not.
In any case, they are close enough not to worry about.
The comparison with my K-corrections is not so close. The differences
are pretty substantial, with my K-corrections generally being smaller.
You shouldn't pay attention to dates past about 30 days because the color
model has run out of steam.
The other attachment has the actual numbers for the three cases that
you gave, as well as a side by side comparison for z=0.05.
Alex
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