Messier 33, M33, Triangulum Galaxy, RFC on process (felix9001)

Celestial hemisphere: Northern · Constellation: Triangulum (Tri) · Contains: M 33 · NGC 598 · Triangulum galaxy

Messier 33, M33, Triangulum Galaxy, RFC on process, felix9001

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Messier 33, M33, Triangulum Galaxy, RFC on process

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Messier 33, M33, Triangulum Galaxy, RFC on process

This is the second version of my Messier 33 picture. It is based on the same pictures than the picture that I uploaded on the 07.01.2020, but I redid the post processing in Gimp. I did not see anywhere the process that I used to remove the sky glow, though I am sure I am not the first one to do it this way.

I would like to know what more experienced people think about this process.

The first revision is the picture as given by Deep Sky Stacker. For the second revision I increased the contrast via the curves, until the target is better visible.

Then I duplicated the layer and set the layer mode to subtract on the duplicated layer. I used the curves dialog in Gimp to cut of the brighter parts of the subtracted until I got the sky glow removed, but the target details are visible. The 3rd revision shows how the subtract layer looks like when switched back to normal. In this revision you can also see how the curve looked like.

After the sky glow is sufficiently removed, I went to “Edit->Copy visible” and to “Edit->Paste as->New Layer” (revision 4). The final corrections were then done on this layer.

Original
B
D
E
Final
F

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Status	Basic success
Started	...
Astrometry.net job	3254857
PixInsight job	n/a
PixInsight queue size	n/a
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Messier 33, M33, Triangulum Galaxy, RFC on process

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Messier 33, M33, Triangulum Galaxy, RFC on process

Messier 33, M33, Triangulum Galaxy, RFC on process

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