Darks and Flats

[stigandi]

Hi all.  A newbie to PI, but so far I'm very impressed.  I'm having some trouble with my Darks and Flats.  As a reference, I have a SBIG STL-11000M camera on a Takahashi TOA-150B and I'm using a EL panel for my flats.  I'm using the settings suggested in the tutorial from Vicent Peris (http://pixinsight.com/tutorials/master-frames/en.html) on Darks and Flats.  The problem is that I'm getting some relics of hot columns in my flats.  That's obviously coming through in my reduced flats that have not been completely fixed with my master dark and bias frames.  I'm using 50 flats, 50 darks and 50 bias to create all the masters.  When I do the same workflow (much simpler) on Nebulosity the flats look smooth and have no sign of the hot columns.  Help... What am I doing wrong?

Thanks,
Rob

http://www.thestinsons.net/Astro

[sreilly]

Rob,

Have you tried applying your darks and flats to your images? I'd suggest that the real test for calibration frames is if they work properly on your image.

Steve

[Lex]

Rob,

I really agree with Steve, the best Test CalImages is to apply them your images.

Pixinsight produces nice master files IMO, surely it is a "longer" way to the result.

I can not imagine that are parasites in you setup because these ELP's are the best you can use.