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Using flats causes odd bullseye pattern

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(@jandac)
White Dwarf
Joined: 6 years ago
Posts: 9
Topic starter  

Hi Mabula. Great program! I have somehow set some parameter to an odd value and am now getting this bullseye pattern whenever I use flats. Have you seen this before or have any idea what I changed to cause this?

Thanks for looking at it.

 

 

bullseye St avg 2160.0s NR x 1.0 LZ3 NS full eq add sc BWMV nor AA RL noMBB St

   
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(@mabula-admin)
Universe Admin
Joined: 7 years ago
Posts: 4366
 

Hi JandaC,

I suspect either someting is missing in your calibration workflow or the flats are simply way off.

Some questions to solve this:

  • Did you calibrate the flats with an appropriate masterbias or master(flat)dark?
  • Did you calibrate the light frames with an appropriate masterbias or masterdark?
  • Can you share sreenshots of an uncalibrated light frame and a flat frame?

Kind regards,

Mabula


   
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