Hi all, I've been out of imaging for a few months but am getting back on the train now. I am following all the same techniques I have used in the past, but I am now getting crazy noise all over my images. I have no idea where this is coming from or what to do to remove it / prevent it in my future imaging sessions.
Below is an integration of 4 hours of the Large Magellanic Cloud on a RedCat51 & ASI294MC Pro combo. I took darks, flats, flat darks (or is it dark flats?). Images were taken at 45 seconds, 120 gain & -10C.
I have attached a full image so you can get an understanding of what the whole picture looks like, as well as a 100% crop of part of the image so you can see the exact pattern. At first I thought it was fixed pattern noise, so I upped by dithering to every 2nd frame but this hasn't fixed the issue. What else could it be? I'm also aware there is a spot in the middle of the image, I believe this may be a moisture issue from cooling too fast? I believe they are separate issues though as only some frames have the spot in them.