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Messier 33 (HaRGB), Linda
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Messier 33 (HaRGB), Linda
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Description

I had posted this RGB version thinking my h-alpha filter was not going to arrive for some time. However, it arrived just after posting and the brief run of clear nights a week ago I was able to get some h-alpha data on this. I was able to get 6 hours and 20 minutes of new h-alpha data.

Unlike the other version I decided not to drizzle mostly so I could use Mure Denoise.

I found combining the data challenging. I tried the NBRGBCombination script tended to overemphasize the h-alpha and even when dialed back added in too much noise to the image. I suspect I need to learn how to use the script better. Instead what I did was to make a mask from the h-alpha data and applied that to the RGB data while still linear. Then used pixel math to substitute the h-alpha data into the RGB image but only where h-alpha appeared in the image. That seemed to work pretty well. The h-alpha shows up clearly but isn't too intense.

I tried to find the right balance between contrast and saturation here and I think I like this version better than the previous version. It has less detail since it isn't drizzled but it also has less visible noise.

Comments

Revisions

  • Messier 33 (HaRGB), Linda
    Original
  • Final
    Messier 33 (HaRGB), Linda
    B

B

Description: forgot to run sharpening on the original

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Messier 33 (HaRGB), Linda

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