Colour artefacts in RGB image

Edward Scorgie

I'm wondering if someone can help with what's causing he red/green/blue stripe artefacts in the "RBG Master" file in the link below.  "RBG Detail" is a close-up of the issue.  I've also included the individual R G and B channel integrations.  I can't see traces of the artefacts in the individual subframes, though I suppose it's possible that they're too faint to see in a single frame.  But at the moment I am assuming they are a function of the pre-processing, rather than baked into the data.  I may be wrong!

Each master is ~90 x 120sec subframes.  Pre-processed using WBPP at default settings.  RGB masters combined using channel combination, then ABE at default settings.  No other processing.

Not sure what I'm getting wrong, but I'm sure someone here can tell me!

Thanks in advance,

Ed.

https://www.dropbox.com/scl/fo/r0z0anyapn8fa7bpthur8/AMuJGLg7iTdJH3QCrbbSknc?rlkey=nu1s8fsi7hpqffd5jrvglunlc&st=h58aassp&dl=0. ;

PS I tried uploading one of the files but the upload just spooled for ages...

BlockHead

Sorry, I am not certain I am following your question.

You seem to be referring to the asteroid trails in your data.

They are partially (but not entirely) rejected.

The pre-processing with "default" settings may not give you the best results. Did you follow my suggestions in FastTrack Training and other videos? I am thinking here specifically concerning the rejection settings. 

(Like Winsorized Sigma Clipping with 2 for the High and 3 for the low values).

You would not see "traces" in the individual frames... you would see a "star"..but it would move from frame to frame.

In FastTrack Training, and else I also recommend (especially in the beginning) look at your data at each step. Blink your registered (and calibrated) data... you would see the asteroid *moving*!

Also... again in FastTrack Training I somewhat anticipate a question like this because that data also has asteroids... and I point them out... AND I also show how you can identify them in your data using the Annotation script!

Let me know if I am on the right track here.

-the Blockhead