Image spcefications:
- Exposure: 6 hours, HaRGB = 220:45:45:45 minutes
- Camera: SBIG ST-8300M, Temp -35 ° C, Astrodon 5nm Ha filter, Baader RGB filters
- Instrument: TEC 140 with field flattener, focal distance 980 mm
- Mount: Losmandy G11
- Guiding: TS Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
- Location: Etoile St. Cyrice, France
- Sky Quality Meter: Between 21,32 and 21,35
- Ambient temperature: -4° C and -6° C
- Date: 16 and 17 Januari 2012
Image acquisition with ImagesPlus 4.0 Camera Control with dither:
- 11 H-alpha of 20 min, binned 1x1
- 9 Red + 9 Green + 9 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
- ImageIntegration, ImageCalibration, StarAlignment, ChannelCombination
- ColorCalibration, BackgroundNeutralization, HistogramTransformation
- ACDNR, CurvesTransformation, SCNR
Processing in Photoshop CS3:
- Combine Ha and RGB (Split RGB and Combine R and Ha in blend mode lighten)
- Levels, Curves
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