After seeing the recent WFOV image of the above targets by Jockinireland (David) I realized that two images I had before (
Flaming Star and
Spider & Fly) might have some overlap that would allow for a mosaic. They did! The Flaming Star image was a SHO image while the Spider & Fly was an HOO image. So, decided to try an HOO of the two combined in a mosaic using PixInsight.
The first image shows the accidental overlap of the two images. Sometimes Murphy takes a coffee break? The second image is an HOO processing of the mosaic. I used GradientMergeMosaic to blend the linear images together and it worked perfectly (at least I don't see any seams or artifacts). I actually made a mosaic of the two
Ha images and then a mosaic of the two O3 images. I processed the
Ha and O3 separately and then combined them after stretching and after removing stars. It was an interesting exercise and a lot of bookkeeping. However, the result made all the effort worthwhile.
By the way I used
NoiseXTerminator to do the noise reduction in the linear phase for both the
Ha and O3 data. It does a much better job than MureDenoise and I was very satisfied with the results. It has the nice feature that you can adjust the amount of noise reduction. I used a lot of noise reduction on the lower signal O3 data and significantly less on the stronger signal
Ha data.
The full resolution version can be viewed/downloaded at the link below:
https://www.dropbox.com/s/pyyuq4kqlrspv ... r.jpg?dl=0
Thanks for looking.
Steve
Steve King: Light Pollution (Bortle 5)
Telescope + Mount + Guiding: W.O. Star71-ii + iOptron CEM40 EC + Orion Magnificent Mini AutoGuider
Camera: ASI 1600MM Pro + EFW Filter Wheel + Chroma 3nm Siii, Ha, Oiii + ZWO LRGB Filters
Software: PHD2; APT; PixInsight ***** My AP website:
www.steveking.pictures