2023-09-16: APP 2.0.0-beta23 has been released !
Improved performance again, CMD-A now works in macOS File Chooser, big improvement for bad column cosmetic correction, solved several bugs
We are very close now to releasing APP 2.0.0 stable with a complete printable manual...
[Solved] Normalization issues
I am having issues with a set of oiii data.
I get really strange artifacts in the illumnation profile of the stack, for a lack of better words, but only in the oiii, the H-alpha stack is smooth as butter and looks very good.
O3 with LNC:
O3 Normalization map:
It is quite obvious (to my eyes) that the normalization map fits very well with the problems in the image.
If i turn off all LNC i get a better result:
Does anyone have an idea what is going on here?
The camera is a Altair Astro Hypercam 1600M and filters are Baader 1,25" filters.
The o3 is quite weak compared to the Ha.
Edit: I have inspected all flats, darkflat and lights, and I don't think there are any that sticks out as "bad".
Any clues would be greatly appreciated. 🙂
Interesting, it almost seems to correlate with the bright patches in the stack without LNC.. I have no real clue, and my answer is going to get boring on this forum, but if you share some of the data I might get a better idea. 🙂 You can upload like 10 of each calibration subs + 10 OIII lights to our APP server, login/password: appuser please create a folder with your name on it first, thank you!
I figured it out. 🙂
The normalization issues were indeed a result of stacking artifacts introduced while stacking. When these were resolved by changing a few settings in registration, the problems were gone.