M81 & M82 with IFN (Greg Mason)

M81 & M82 with IFN

Revision title: M81 & M82 with IFN

This is my first attempt to process IFN in the foreground. I found it quite challenging, and the IFN is noisy. So, I know I need more integration time, but the weather isn't going to cooperate this month, and by next new moon, it will be too late in the season. I was planning at least 25 hours total, but would now have to finish collecting it next year, so I decided to go ahead and process what I have. To add to the 12 hours I was able to collect this spring, I added a few hours of data I collected with a DSLR 4 years ago. I'm not sure it helps with the detail in the galaxies, but it did help with the noise in the IFN.

PixInsight Workflow

Weighted Batch Pre-Processing: through the registration process
(WBPP processes everything else separately, due to the different resolutions of the cameras)

StarAlignment (Generate Drizzle Data)
LocalNormalization
ImageIntegration (Modify Drizzle Data)
DrizzleIntegration X2

Post-Processing:

DynamicBackgroundExtraction (worked better than GradientCorrector with the IFN)
BlurXterminator - Correction Only
SpectrophotometricColorCalibration w/BackgroundNeutralization
BlurXterminator
TGVDenoise
MultiScaleMedianTransform
NoiseXterminator
StarXterminator

Work starless and stars separately

starless
ArcsinhStretch
HistogramTransformation - Black Point for contrast
LocalHistogramEqualization
CurvesTransformation - Saturation

stars
ArcsinhStretch
CurvesTransformation - Saturation

PixelMath to combine stars and starless
~((~starless)*(~stars))

MorphologicalTransformation to reduce stars

Original
Final
D

D

Title: M81 & M82 with IFN

Description: Pulled back a bit on the stretching. Used more masks to help strike a balance between being able to see the IFN, while still showing the details in the galaxies. Still, no replacement for integration time.

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Texas Astronomy
ZWO ASI 2600MC PRO

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Status	Advanced success
Started	...
Astrometry.net job	9781187
PixInsight job	ROO9UITEK4XJNQQL79KANFFM11641W6J
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h55m27s.300
RA (top/left)	10h02m36s.423
RA (top/right)	10h03m31s.232
RA (bottom/right)	09h47m34s.222
RA (bottom/left)	09h48m05s.544

Dec (center)	+69°19′16″.49
Dec (top/left)	+68°17′41″.45
Dec (top/right)	+70°18′56″.69
Dec (bottom/right)	+70°19′37″.94
Dec (bottom/left)	+68°18′17″.22

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M81 & M82 with IFN

Revision title: M81 & M82 with IFN

M81 & M82 with IFN

Revision title: M81 & M82 with IFN

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M81 & M82 with IFN

Revision title: M81 & M82 with IFN

M81 & M82 with IFN

Revision title: M81 & M82 with IFN

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