Thank you for your good tutorial.
Just a question: why do you use an aggregated image of background with stars for Background Neutralization? I suppose it could be without stars or dso.
Thank you for reading!
For BackgorundNeutralization an area where sky is dominant is needed, so a few stars
without extended colored halos are ok, the important thing is that you correctly set the Upper limit: I usually use Statistics on the Preview or the aggregated image and I set the Upper limit slightly higher than the median level of the image, in such a way you exclude the stars from the background calculation.
In this particular case I choose to use an aggregated image from different patches of sky because the background was very uneven and so a single patch of sky wouldn't be representative.
Bye
Edoardo
