cmunipack , amper.ped.muni.cz
Fri May 11 17:22:48 CEST 2007
thank you for this hint. I changed the threshold gradually from 5 down to 3
sigmas. More "stars" are detected (I think there aren't 200 stars in the
picture) but the problem is still the same.
By the way I have a question about these sigmas. Low good datum is in sigmas and
threshold is in sigmas. But sigmas of what? Can I compute the appropriate value
of sigma for my set of frames?
Another thing that I don't understand are the four " .....cut off". What does
the values mean? I couldn't find an explanation in the helpfile.
Thank you for your help.
----- Original Message -----
From: <cmunipack , amper.ped.muni.cz>
To: <cmunipack , amper.ped.muni.cz>
Sent: Friday, May 11, 2007 3:32 PM
Subject: Re: [Cmunipack] Photometry
maybe you have set up too high Threshold.
Citát cmunipack , amper.ped.muni.cz:
> Hallo David and you all,
> when I examened the srt-files of the U Gem field I found out that even bright
> stars (1500 ADU out of 4096 ADU) were missing on a lot of frames although
> there weren't any bad pixels in them. I had a close look at these frames but I
> can't see any pattern behind this behavior of the program.
> Best regards
> Cmunipack mailing list
> Cmunipack , amper.ped.muni.cz
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