NGC7023 Dusty Iris (Dawn Lowry)

NGC7023 Dusty Iris

Revision title: slight brightness change

NGC 7023 Iris Nebula This past November (2021) A group of us headed to West Texas under B1 skies for 9 wonderful nights and imaged. Iris nebula while being bright persay at 6.8 magnitude is very much a challenge from light polluted skies to capture the amazing dust surrounding it and in the region.

This image only has about 9 hours of data and I definitely plan to add considerably more time to it from those wonderful Bortle 1 light pollution free skies in Texas.

This is my edit from a Collaboration of data acquisition under Bortle 1 skies at the Shurley Ranch in Marfa, Texas, November 2021, by Dawn Lowry, Gian Lorenzo Ferretti, Ewa Pasiak and Terry Felty.

Date: Nov 7, 2021
Scope: TS photoline 107mm and ASI294MC for color and a Skywatcher Esprit 120 with ASI294mm for Lum
Frames: Astrodon Lum Gen 2 98 frames @180sec each frame. And then 79 frames for color @ 180sec each with UV/IR cut filter from ZWO

Total Integration: 8h 51m

Thank you for looking and~CLEAR SKIES>

Locations: West Texas Bortle 1 Shurley Ranch, Marfa, TX, United States
processing Pixinsight:
Color workflow
DBE with careful attention to dusty regions.
BGN and color calibration;
MLT for Noise reduction with several controlled passes
Lum workflow~
DBE
decon with autopsf 15 iterations 5 layers;
MLT for noise reduction

HT for Lum with Bg at 9% for both color and Lum-further stretch with Lum mask-
Multiple masks for Curves with range and color and Lum masking for lightness and sat boost
LRGB with chromatic NR
LHE after for small and larger kernels masked for the nebula regions. at 70% and then 25%

XPTR with Neb mask for lum boost; and then for dusty regions
TGVDN
Morph to reduce the stars two iterations
Numerous masks and pixel math. for specifics

Original
Final
B

B

Title: slight brightness change

Description: brightened Neb and then specific to Dust

Uploaded: ...

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Status	Advanced success
Started	...
PixInsight job	ZNLMJXCILWH6ZWIOPJ7W6DH75GNAEHMT
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m28s.447
RA (top/left)	21h06m00s.572
RA (top/right)	21h06m09s.655
RA (bottom/right)	20h56m45s.900
RA (bottom/left)	20h56m58s.864

Dec (center)	+68°08′36″.56
Dec (top/left)	+67°41′16″.15
Dec (top/right)	+68°35′50″.58
Dec (bottom/right)	+68°35′37″.52
Dec (bottom/left)	+67°41′06″.83

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