Continuing to reprocess old data since I've realized my processing skills were shit back when I originally shot this galaxy in 2019. I'm a lot happier with the more natural colors and better noise reduction on this one. Captured on April 22nd and 23rd, 2019 from a bortle 7 zone.
Places where I host my other images:
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TPO 6" F/4 Imaging Newtonian
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Orion Sirius EQ-G
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ZWO ASI1600MM-Pro
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Skywatcher Quattro Coma Corrector
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ZWO EFW 8x1.25"/31mm
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Astronomik LRGB+CLS Filters- 31mm
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Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
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Agena 50mm Deluxe Straight-Through Guide Scope
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ZWO ASI-290mc for guiding
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Moonlite Autofocuser
Acquisition: 2 hour 47 minutes (Camera at Unity Gain, -20°C)
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CLS- 52x120"
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Red- 21x60"
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Green- 21x60"
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Blue- 21x60"
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Darks- 30
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Flats- 30 per filter
Capture Software:
- Captured using N.I.N.A. and PHD2 for guiding and dithering.
PixInsight Processing:
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BatchPreProcessing
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SubframeSelector
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StarAlignment
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ImageIntegration
Linear:
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DynamicCrop
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DynamicBackgroundExtraction 2x
duplicated each image and removed stars via StarXterminator. Ran DBE with a shitload of points to generate background model. model subtracted from original pic using the following PixelMath (math courtesy of /u/jimmythechicken1)
$T * med(model) / model
Luminance Linear:
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BlurXTerminator
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ArcsinhStretch + HT to stretch nonlinear
RGB Linear:
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ChannelCombination to combine monochrome Red Green and Blue stacks into color RGB image
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SpectroPhotometricColorCalibration
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BlurXTerminator
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DeepSNR
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HSV Repair
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ArcsinhStretch + HT to stretch nonlinear
NonLinear:
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LRGBCombination to add stretched L as a luminance layer to RGB
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Several Curve transformations to adjust lightness, contrast, saturation, hues, etc with various masks
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DeepSNR again
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MLT for large scale chrominance noise reduction
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More Curves
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Invert > SCNR green > Invert to remove some magentas from stars
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LocalHistogramEqualization
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even more curves
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DynamicCrop
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Annotation