Western Veil Nebla (David McClain)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Filamentary nebula · Lace-work nebula · NGC 6960 · The star 52Cyg · Veil nebula

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Western Veil Nebla

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Western Veil Nebla

This image goes along with the previous one. Both were acquired during the same observing run. And both have been processed (almost) the same way.

As a scientist, I keep hoping to find a routine method for diminishing overly abundant field stars. But every image seems to be unique. I have not yet found one method which works well on every image. It must be subject dependent because in the case of these two aspects of the Veil Nebula, everything was the same during image acquisition. Perhaps field star densities and distributions (spongiform in the previous Eastern Veil image, and not so much so in this image) cause the image processing tools to respond slightly differently. I'm still looking and hoping for a less subjective approach.

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Revision D -- more experiments in reliable, repeatable, objective methods for field star moderation.

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Revision E -- Ibid.

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Revision F -- early wavelet layer denoising and field star moderation. ( !! ) I hadn't realized the extent of the cirrus field until now. I knew about the faint gas emanating to the right in the image, but the rest of it is a surprise. It could only be seen after doing the denoising in the linear domain. Not quite as pretty now, but I couldn't bear hiding it.

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Status	Basic success
Started	...
Astrometry.net job	1117841
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Western Veil Nebla

Western Veil Nebla

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