Celestial hemisphere:  Northern  ·  Constellation: Ursa Major (UMa)  ·  Contains:  M 109  ·  NGC 3992
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M 109 -- LRGB, Scott Badger
M 109 -- LRGB
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M 109 -- LRGB

Getting plate-solving status, please wait...
M 109 -- LRGB, Scott Badger
M 109 -- LRGB
Powered byPixInsight

M 109 -- LRGB

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Description

This one was a bit of a challenge. There was scattered light from a star just out of the FOV that affected most of the image, and looked like a spotlight on M 109. VERY intensive DBE took care of most of the glow, but left ray-like artefacts behind which were impervious to DBE, etc. In the end, I used a pixel math expression to replace the background with randomly selected pixels from an area of the image that was least affected by the scattered ight, a background graft so to speak. In the revisions, I put the original lum integration and the lum integration after DBE to show the issue.

Comments

Revisions

  • M 109 -- LRGB, Scott Badger
    Original
  • M 109 -- LRGB, Scott Badger
    E
  • M 109 -- LRGB, Scott Badger
    F

Sky plot

Sky plot

Histogram

M 109 -- LRGB, Scott Badger