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Hi Ginny,I gather that you have created the Zero.fits bias image outside of
ccdproc. That is fine though, as you found, it can be tricky to tell
ccdproc that you did that. The keyword you want to add is ZEROCOR.
The value can be anything. I think that will solve the problem
though I'm not completely sure if I've overlooked something. Let me
know if this doesn't solve your problem. Send me the parameters
(lpar ccdproc ccdred) and a header listing of the image you are
trying to process and for the zero image.Yours,
Frank Valdes
On Nov 12, 2005, at 10:24 PM, Ginny McSwain wrote:> I'm having trouble with the background correction in ccdproc. I have
> created an average zero image called Zero.fits, which looks fine. But
> when I process my objects with ccdproc, the routine is processing
> Zero.fits for the background correction, and it is over subtracting
> the
> background in the objects. I have tried adding a dummy CCDPROC
> keyword to
> Zero to make the routine think it has been processed so that it
> won't be
> overwritten, but that doesn't work. Any suggestions?
>
> I am using PC-IRAF V2.12.2, and our sysadmin recently removed some
> older
> files from IRAF installed on the network (what files, he didn't
> say...).
> If this might be related, I'll go bug him!
>
> Thanks,
> Ginny McSwain
>
>