Image spcefications:
- Exposure: 8 hours, HaRGB = 300:60:60:60
- Exposure: 5 hours O3 with Astronimic O3 filter by Oliver Penrise, Etoile St. Cyrice, France
- Camera: SBIG ST-8300M, Temp -25 ° C Astrodon 5nm H-alpha filter
- Instrument: TEC 140 with field flattener, focal distance 980 mm
- Mount: Losmandy G11
- Guiding: TS Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
- Location: Overveen, Netherlands
- Sky Quality Meter: 21,50
- Ambient temperature: 20° C
- Date: 23 october 2011 (Ha), 22 august 2012 (RGB)
Image acquisition with ImagesPlus 4.0 Camera Control with dither:
- 15 H-alpha of 20 min, binned 1x1
- 12 Red + 12 Green + 12 Blue of 5 min, binned 2x2
- 20 Flat fields per channel with Aurora Flatfield panel
At home, camera in fridge:
- 20 Dark frames of 20 min + 20 Dark frames of 5 min
- 20 Flat darks (per channel) + 20 Bias frames
Processing in PixInsight 1.7
- ImageCalibration, ImageIntegration, StarAlignment, ChannelCombination
- BackgroundNeutralization, ColorCalibration, HistogramTransformation
- LRGBCombination, ACDNR, CurvesTransformation, SCNR
- HDRMultiScaleTransform, PixelMath
- Ha and RGB combined with method Vincent Paris
Processing in Photoshop CS3:
- Combine O3 and HaRGB (Split RGB and Combine G and B with O3 in blend mode lighten)
- Levels, Curves
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