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How to post-process the Comet C/2022 E3 ZTF (Neanderthals) in PixInsight

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Watch Adam Block, our tutor and ambassador, guide you through post-processing a Telescope Live dataset of the Comet C/2022 E3 ZTF (Neanderthals) using PixInsight software.
SPECIFICATIONS
Tutor .......................................................................................................................................................................................................................... Adam Block
Parts .......................................................................................................................................................................................................................... 3 videos
Duration .......................................................................................................................................................................................................................... 1h 59m
Image type .......................................................................................................................................................................................................................... Deep Sky Imaging
Difficulty level .......................................................................................................................................................................................................................... Intermediate
Category .......................................................................................................................................................................................................................... Master Classes
Tier .......................................................................................................................................................................................................................... Premium
Software used .......................................................................................................................................................................................................................... PixInsight
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PART 1
Introduction, Star Alignment, Comet Alignment, Local Normalization
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Introduction, Star Alignment, Comet Alignment, Local Normalization
PART 1
Introduction, Star Alignment, Comet Alignment, Loc...
37 minutes
L and RGB Cleanup, Comet Subtraction, Image Integration
PART 2
L and RGB Cleanup, Comet Subtraction, Image Integr...
41 minutes
SPCC, Color Transfer, Create LRGB, Blend with StarField, Final Wrap Up
PART 3
SPCC, Color Transfer, Create LRGB, Blend with Star...
41 minutes
PART 1

Introduction, Star Alignment, Comet Alignment, Local Normalization

Comments

Please see minute 24:24 ... the screen flashes quickly! You will need to pause the video to see the settings. WSC, Low 2, High 1.8
-adam

I would also like to know what pixel rejection settings are used in the integration

Reply: 4

He Used Winsorized Sigma Clipping tho, but with some different values In Pixel Rejection(2). Using the default Values You'll get something close to what he's showing but much fewer rejections. You can also use Linear Fit Clipping. It gives the same results as WSC but with a slope Map and with a touch of difference. I used WSC with sigma low (2.0) and Sigma high (1.8) and winsorization cutoff to Default (5.0). Got the Nearest Pixel Rejection as in the Video🙂

(2.0) Sigma low & (1.8) Sigma high with the Winsorization Cutoff to be default (5.0). I saw that in the 2nd Video and it turned out to be the nearest I could get to what he was showing. Try it. You won't regret it for sure! and one more piece of advice. Further, in the 2nd Video, you'll go through the "Comet Subtracted" part. You'll be doing the Comet Alignment part again, so while doing that make sure that you uncheck the "Linear Fit" option. You'll thank me later for saving big time!

What pixel rejection are you using to integrate? When I process it I get pretty much zero rejection with default settings.

He Used Winsorized Sigma Clipping tho, but with some different values In Pixel Rejection(2). Using the default Value You'll get something close to what he's showing but much fewer rejections. I would recommend using the "hit n' trial" Method to find values approx. to the video! I used Winsorized Sigma Clipping with sigma low (2.0) and Sigma high (1.8) and Winsorization cutoff to Default (5.0). Got the Nearest Pixel Rejection as in the Video✌️