Image spcefications:
- Exposure: 6 hours, HaO3LRGB = 120:110:50:25:25:25
- Camera: ZWO ASI2600MM, Temp -10 ° C, Baader LRGB filters
- Instrument: TEC 140, focal distance 980 mm
- Mount: Paramount MX+
- Guiding: TS Off Axisguider, Starlight Xpress Lodestar autoguider and PHD
- Location: Nozière, France
- Ambient temperature: round 21° C
- Date: Between 19 July and 19 August August 2023
- © Frans Kroon, Arno-MarkBlesgraaf
Image acquisition Sequence Generator Pro:
- 12 H-alpha of 10 min, binned 1x1
- 11 O3 of 10 min, binned 1x1
- 5 Lum of 10 min, binned 1x1 not used in processing
- 5 Red + 5 Green + 5 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, O3, Lum and RGB
Non Lineair:
- HistogramTransformation on Ha, O3, Lum and RGB
- NoiseXTerminator on Ha, O3, Lum and RGB
- Create StarImage of RGB with StarXTerminator
- LRGBCombination
- StarXTerminator on Ha, O3 and LRGB
- HDRMultiscaleTransform on starless LRGB
- NBRGBCombination on starless Ha, O3 and LRGB
- In Photoshop: make background sky dark (25:25:25) with Levels of result NBRGBCombination
- PixelMath to put them together: StarlessImage + StarImage
- SCNR
- HDRMultiscaleTransform
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