Image spcefications:
- Exposure: 8 hours, HaLRGB = 300:180:30:30:30
- Camera: ZWO ASI2600MM, Temp -10 ° C, Baader LRGB filters, Astrodon 5 nm Ha
- Instrument: TEC 140, focal distance 980 mm
- Mount: Paramount MX+
- Guiding: TS Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
- Location: Nozières, France
- Ambient temperature: round 21° C
- Date: 5, 6 and 10 September 2023
- © Frans Kroon, Arno-MarkBlesgraaf
Image acquisition Sequence Generator Pro:
- 30 H-alpha of 10 min, binned 1x1
- 18 Lum of 5 min, binned 1x1 not used in processing
- 6 Red + 6 Green + 6 Blue of 5 min, binned 1x1
- 25 Flat fields per channel with Flatfield panel
- 20 Dark frames of 10 min + 20 Dark frames of 5 min + 50 Bias frames
Processed with PixInsight 1.8.9-2:
Lineair:
- ImageCalibration and StarAlignment
- ImageIntegration and ChannelCombination RGB
- GraXpert on Lum and RGB
- ImageSolver and SPCC on RGB
- BlurXTerminator on Ha, Lum and RGB
Non Lineair:
- HistogramTransformation on Ha, Lum and RGB
- NoiseXTerminator on Ha, Lum and RGB
- Create StarImage of RGB with StarXTerminator
- LRGBCombination
- StarXTerminator on Ha and LRGB
- HistogramTransformation on Ha and LRGB
- PixelMath to combine Ha and LRGB with $T + (Ha - Med(Ha)) * 0.5
- PixelMath to put them together: StarlessImage + StarImage
- In Photoshop: make background sky dark (25:25:25) with Levels
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