PIER-14 4 panel SHO narrowband mosaic of the sadr region

Mike, 

Very nicely done and so very fast. There is quite a disparity between the number of subs within each panel and between panels, so did you try to adjust the numbers of subs used in each stack to try and equalise them, and similarly between panel? I agree for getting more data even if to bring about more parity between panels. BTW we still have job 1065 repeating so that will add more subs to that panel, leaving just 1063 and 1064 for additional time.

Thanks for making this available to us so soon.

Cheers Ray

Hi Ray,
I haven't been too concerned with the noise levels of the individual panels.
The noise levels with the fewest number of subs are already so low that I have decided to use all subs.The main problem is differences in the sky background between the panels.
So I had to normalize the panels.
The script linear-fit is unfortunately not suitable for this.
So searched the net and then came across the script DNA linear fit.
Using this script I was able to normalize the panels so that all panels have the same median.
Then use mosaic by coordinates.
Works much better than image registration.
However, all panels must have a plate solve. This is not a problem with the script imagesolver.
You can find the dna-lineair fit script here: DNA Linear Fit | PixInsight Forum
or here: PixInsight DNA Linear Fit - Chaotic Nebula

Best regards,
Mike

Hi Ray,
 
Imageregistration doesn't work at all so use mosaic by coordinates.
Imageregistration is not very robust for creating mosaics.

Best regards,
Mike

Hi Mike,

I'll look into that. Again thank you so much for all your help particularly regarding mosaics. It's great having people on the forum with such vast knowledge, I would have been unable to do so many of the things that I know now without such help.

Kind regards,

Ray

Next try of the 4 panel mosaic of the Sadr region.

Hi Mike,

Just found and put on my 'art critic' spectacles to view this latest rendition.  

This for me is a more refined version and conveys to the viewer that a more balanced approach was taken. There's now far less tendency for one's eyes to be drawn away to the edges of the image away from the central theme of the image,  the star 'Sadr'. Also the introduction of more colour variation I feel helps to maintain one's interest. 

At that resolution unfortunately it's impossible to see if it is more seamless and has better star shapes, but I suspect it probably does. One for the gallery, but first remember to cut it down it down to within an inch of its life.

Cheers 

Ray