[Cmunipack] Photometry

[cmunipack , amper.ped.muni.cz]

Hi Marek,

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.

Best regards
    Jörg!


----- 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


Hi Jorg,

maybe you have set up too high Threshold.

Best regards
Marek!

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
>    Jörg!
>
>
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