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 a problem about the phot
   
Anonymous: Guest
 11/12/2005 03:04PM (Read 2708 times)  



Dear Sir,
 
I have a problem about the output mag. values of the digiphotx package.
 
Recently, I always get the mag. values larger than before in both apphot and daophot packages. The zero point is the same before and now.
I set the parameters follow the cookbook, A Reference Guide to the IRAF/DAOPHOT Package, by Lindsey E. Davis,1994. 
In the same image, I get ~2.5 mag. larger than before. I've checked most of the stars in the image.
 
About one month ago, it happened once. I checked the parameters and reset them. The problem was gone and I can get the "normal" mag. values.
In these days, it happens again. After I check and reset all parameters (I did what I did last time), the problem is still there.
 
I have no idea how I can get back the normal mag. values.
My OS system is Fedora Core 3. The vision of IRAF is 2.12.2.
Do you know what causes the problem? any parameters I missed to check?? Does anyone has the problem??
 
Thank for your help.
 
Regards,
 
Hu Juei-Hwa
 
 
--
Hu Juei-Hwa
Institute of Astronomy,
National Central University, Taiwan
TEL +886-3-4227151 ext 65969
FAX +886-3-4262304

 
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