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color dots on photo
yesterday I started taking subs of M101.
After 60x60sec subs I decided to check the result so far (because m101 was almost unseen on single subs and I wanted to confirm my position).
Calibrated with flats and bias, I got an image with a lot of color dots that seems to run from left to right (the dec orientation of the frame).
Help on this issue is much appreciated.
@ofergol Hi Ofer, those colored dots are hot pixels which you can get rid of by using darks as well.
Yep, Darks and dithering!
I added darks and got a strange error message (attached).
What am I doing wrong?
I think all parameters are the same.
Log files for light/flat/dark are attached.
0.03 seconds is too short for a flat, you need to get that up to 1-2 seconds preferably. You also need a masterbias or darkflat to correct them with the same exposure length as the flat.