M94

Shotdate: 5th May 2011

Location: Home, Teuge, NL

Camera: Nikon D3x

Optics: Celestron Edge HD 9,25"

Mount: Skywatcher HEQ6 Pro

Guiding: LVI SmartGuide 2 (which was bad this night)

 

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Stacking in DeepskyStacker 3.3.2

 

DeepSkyStacker settings:

Stacking mode: Custom Rectangle

Alignment method: Bicubic

Drizzle x2 enabled

Stacking 49 frames 30 seconds (ISO: 6400) - total exposure: 24 mn 30 s

 

RGB Channels Background Calibration: Yes

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

 

Offset: 50 frames exposure: 1/8000 s

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

 

Dark: 40 frames exposure: 30 s

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

 

Flat: 40 frames exposure: 1/8 s

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

 

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Postprocessing in PixInsight 1.6

 

DynamicBackgroundExtraction

BackgroundNeutralization

ColorCalibration

HistogramTransformation

HDRWaveletTransform

ACDNR

HistogramTransformation @ ~0,375 midtone, 5 times and save each step as 32-bit FITS-file

HDRComposition of 5 32-bit FITS frames

HistogramTransformation

ChannelExtraction: making hdr_L mask

HistogramTransformation: hdr_L

CurvesTransformation: Masking with hdr_L

Done