Put off on processing this for a while because heavy light pollution broadband sucks :-(
I'd still consider this an improvement over my [last attempt at this galaxy](https://www.reddit.com/r/astrophotography/comments/6l4rpe/the_fireworks_galaxy_and_ngc_6939/) back in 2017 (this was my second ever DSO pic). Captured on september 12th and 13th, 2023 from, my bortle 8 apartment balcony.
**Places where I host my other images:**
[Instagram](https://www.instagram.com/leftysastrophotography/) | [Flickr](https://www.flickr.com/people/leftysastrophotography/)
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**[Equipment:](https://i.imgur.com/ejpKkwU.jpg)**
* TPO 6" F/4 Imaging Newtonian
* Orion Sirius EQ-G
* ZWO ASI1600MM-Pro
* Skywatcher Quattro Coma Corrector
* ZWO EFW 8x1.25"/31mm
* Astronomik LRGB+CLS Filters- 31mm
* Astrodon 31mm Ha 5nm, Oiii 3nm, Sii 5nm
* Agena 50mm Deluxe Straight-Through Guide Scope
* ZWO ASI-120mc for guiding
* Moonlite Autofocuser
**Acquisition:** 7 hour 36 minutes (Camera at half Unity Gain, -15°C)
* L- 247x60"
* R - 70x60"
* G - 70x60"
* B - 70x60"
* Darks- 30
* Flats- 30 per filter
**Capture Software:**
* Captured using [N.I.N.A.](https://nighttime-imaging.eu) and PHD2 for guiding and dithering.
**PixInsight Processing**
* BatchPreProcessing
* StarAlignment
* [Blink](https://youtu.be/sJeuWZNWImE?t=40)
* ImageIntegration
**Luminance Linear:**
* DynamicCrop
* DynamicBackgroundExtraction
* NoiseXterminator
* MaskedStretch to 0.1 background
* Starnet++ starmask made, subtracted from 0.3 Gray image and colvolved
* Previous image used as a mask to stretch nebulosity without stretching stars
**RGB Linear:**
* DynamicCrop
* DynamicBackgroundExtraction
* ChannelCombination
* SpectrophotometricColorCalibration
* HSV Repair
* Slight SCNR green
* AcrsinhStretch + HistogramTransformation to stretch nonlinear
**Nonlinear:**
* added stretch luminance to stretched RGB via LRGBCombination
* DeepSNR
* Several CurveTransformations to adjust hue, lightness, saturation, etc.
* Extract L --> LRGBCombination for chrominance noise reduction (masked)
* more curves
* MultiscaleLinearTransform
* LocalHistogramTransformation
* even more curves
* UnsharpMask to slightly sharpen galaxy
* guess what more curves
* DynamicCrop again
* annotation
lefty7283
