The Veil Nebula Complex (Benjamin Olry)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Filamentary nebula · IC 1340 · Lace-work nebula · NGC 6960 · NGC 6992 · NGC 6995 · Network nebula · The star 52Cyg · Veil nebula

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The Veil Nebula Complex

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The Veil Nebula Complex

This is cobbled together material spanning back up to 2 years. The plan was to make a clean HA OIII bicolor with a synthetic green channel from ha and oIII multiplied. The Ha acquisition went fine, but I had only 1 night before the moon spoiled the sky for OIII so I was pretty pumped to get most of that 1 night. Turned out, that my OIII clip in filter doesn’t like my Nikon 400/3.5 despite being slower, longer and having the last glass element before the sensor almost half down the ota. There were halos around every piss poor tiny star and they were almost as bright as the star itself. So I dug up old data from 2018 where I acquired around 15h of OIII with a Canon 300/2.8 with only moderate halos and preprocessed the shit out of it to match the actually much better ha data. OIII from 2018 with preprocessing from scratch turned out pretty good but the star sizes didn’t match at all, synthetic green channel wasn’t an option any more and so I dug up even older rgb widefield data for the star colors and used the ha star shapes as a mask with the difference of starnet++ subtracted by the normal stack in PS. So here is the hard data:

24h of HA in 300s exposures with Nikon 400/3.5, Canon 40d mono on NEQ6 with MGENII

15h of OIII in 100s exposures with Canon 300/2.8, Canon 40d mono on Star Adventurer with MGENII

2h of RGB in 30s exposures with Canon 300/2.8, Sony A7rII on Star Adventurer

flats, darks, bias were shot but I cannot really figure how much for every combination. Software used: cr2fits for file conversion, AstroPixelProcessor for preprocessing, stacking and light pollution removal, Lightroom and Photoshop for combining, masking and color correction, Starnet++

CS

Ben

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Status	Basic success
Started	...
Astrometry.net job	2899093
PixInsight job	n/a
PixInsight queue size	n/a
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