Tube Reflections

[waelchlispixinsight]

Hello everybody
I have annoying tube reflections on one of my last image sets. Target is M1 in Taurus. I took R,G,B and HII subs and the reflections showed up on every channel. So the cause is likely an insufficient baffling or otherwise missing anti-reflection measures.

Anyways - it is not my scope and I have only limited access to it. I would like to "rescue" the image and so I ask the community if anyone has an idea on how to fix this (except from clone-stamping, what I had already been doing for a previous version of the image).

A version of the image almoust processed to a final state:

Find the .XISF non-linear image to further process it.
http://www.upsky.ch/Private/M1/M1_HII(25%25)_RGB(75%25).xisf

Thank you for reading and helping.

Hansjörg
http://www.upsky.ch

[msmythers]

You might look at this posting for ideas. I think it should work it will just take a little work.
https://pixinsight.com/forum/index.php?topic=9141.0



Mike

[bill]

Nice image!

[GJL]

Hello Hans Jörg

You need a mask in the same shape as the artifact. This can be achieved with the SnipMask, a description can be found here and can be downloaded

https://pixinsight.com/forum/index.php?topic=11942.0

In the attached .pdf file the steps are shown.      Gerhard

[waelchlispixinsight]

@ Mike: Thank you for the tip. Sounds interresting. Tha ability to create a mask shape in a defined manner can be of real help. Will have to recall the math from my old brain. How to get the center point of a circular arc given by three points? 
@ Gerhard: This sort of help can be called "full board" (like when you enter a hotel where you get all you need an even more than you dreamt off). Thanks a many lot.
@ Bill. Thanks for "the flowers".

So I know hat I will have to to the next one or two hours.

All of you a good Easter time.

Hansjörg