RGB H-alpha modified camera.
65 x 2 min = 2.2 hr total exposure
Stacked and processed in PixInsight with the following steps:
- Weighted Batch Preprocessing
... dark subtraction
... cosmetic correction
... local normalization
... integration by PSF Signal Weight
... drizzle integration
- Dynamic Background Extraction
- Spectrophotometric Color Calibration (avg spiral galaxy white ref.)
- BlurXTerminator
- Histogram Transform to non-linear
- StarNet2 to separate nebula from stars
- HDR Multiscale Transform
- Local Histogram Equalization
- Curves for contrast and saturation
- Shrink stars and recombine
- NoiseXTerminator
- Multiscale Linear Transform (sharpen)
I did not try to alter the color from the calibrated results, but I was surprised how much blue is present.