M101 widefield

Shotdate: 7-4-2013

Camera: Nikon D3x

Optics: Nikon 80-400mm f4.5-5.6 @ 400mm f8

ISO: 1600

Mount: AstroTrac

Subexposure: 195 seconds

 

DeepSkyStacker settings:

 

Stacking mode: Standard

Alignment method: Bicubic

Stacking 28 frames total exposure: 1 hr 31 mn 0 s

 

RGB Channels Background Calibration: Yes

Per Channel Background Calibration: No

Method: Kappa-Sigma (Kappa = 2.00, Iterations = 5)

 

Offset: 108 frames exposure: 1/8000 s

Method: Kappa-Sigma (Kappa = 2.00, Iterations = 5)

 

Dark: 5 frames exposure: 3 mn 15 s

Method: Kappa-Sigma (Kappa = 2.00, Iterations = 5)

 

Flat: 32 frames exposure: 5 s

Method: Kappa-Sigma (Kappa = 2.00, Iterations = 5)

 

Postprocessing in PixInsight Core 01.07.06.0793 Starbuck (x86_64)

Copyright (C) 2003-2012 Pleiades Astrophoto

 

open 20130407_M101_400mm_f8-0_195sec_ISO1600/Autosave.tif

 

DynamicCrop: Processing view: Autosave

 

5 times:

ChannelExtraction: Processing view: Autosave

ATrousWaveletTransform: Processing view: Autosave_L

HistogramTransformation: Processing view: Autosave

Autosave_L: Masking from swap files...

 

DynamicBackgroundExtraction: Processing view: Autosave

 

ImageIdentifier: Processing view: Autosave_DBE

id = org

 

ChannelExtraction: Processing view: org

ATrousWaveletTransform: Processing view: org_L

HistogramTransformation: Processing view: org

org_L: Masking from swap files...

 

ATrousWaveletTransform: Processing view: org_clone

 

ImageIdentifier: Processing view: org_clone

id = ss

 

PixelMath: Processing view: ss

Executing PixelMath expression: combined RGB/K channels:org-ss: 100%

Truncating to [0.0000000000,1.0000000000]: 100%

 

ChannelExtraction: Processing view: org

 

HistogramTransformation: Processing view: org_L

 

HistogramTransformation: Processing view: blur

org_L: Masking from swap files...

 

CurvesTransformation: Processing view: blur

org_L: Masking from swap files...

 

PixelMath: Processing view: blur

Executing PixelMath expression: combined RGB/K channels:org+ss+blur: 100%

Rescaling to [0.0000000000,1.0000000000]: 100%

 

ImageIdentifier: Processing view: itr1_clone

id = itr1_ss

 

ATrousWaveletTransform: Processing view: itr1_ss

 

PixelMath: Processing view: itr1_ss

Executing PixelMath expression: combined RGB/K channels:itr1-itr1_ss: 100%

Truncating to [0.0000000000,1.0000000000]: 100%

 

ChannelExtraction: Processing view: itr1_blur

 

HistogramTransformation: Processing view: itr1_blur_L

 

HistogramTransformation: Processing view: itr1_blur

itr1_blur_L: Masking from swap files...

 

CurvesTransformation: Processing view: itr1_blur

itr1_blur_L: Masking from swap files...

 

PixelMath: Processing view: itr1_blur

Executing PixelMath expression: combined RGB/K channels:itr1+itr1_ss+itr1_blur: 100%

Rescaling to [0.0000000000,1.0000000000]: 100%

 

HistogramTransformation: Processing view: itr2

 

CurvesTransformation: Processing view: itr2

 

ACDNR: Processing view: itr2

Building lightness mask: 100%

 

DynamicBackgroundExtraction: Processing view: itr2

 

HistogramTransformation: Processing view: itr2_DBE

Done