VNP
I noticed something in the raw camera output, when zoomed in and at high gain with very low expo time I think it is a bias issue, and the perpendicular...
ZWO ASI 678MM, with external peltier cooling, sensor kept at 20C
I managed to mitigate the issue by increasing the exposure time, and that by putting a neutral density filter into the light train. At around 1-1.5 ms expo time, the...
If I am right, then this +- 30 px image should be accurate, reflecting a +-70km/s (give or take) radial speed 
Above, both of my images (composed in ms paint, and the disk) are in H alpha, and I restrict my question to dark-feature-moves-off-band on the light disk, and light-feature-moves-off-band beyond...
I have the "cube" for this particular instance, 30+1+30 pixel shifts, going through from blue-onBand-red, if you want to check it out, the 2GB file, and the larger ser is...
Yes, thank you
PS: this is a rather big change, as it seems to also affect ImageMath which I use to create cubes.
With only banding turned on, no anti-jagging, and a very decent disk_25_0 from the CaH line (aka H epsilon)  the raw video is here (will take at least a...
Now, the issue is: the same artefact shows up when I call img(25) -- which is supposed to be as close to the raw counts as possible, **without fix_banding**. This...