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Sunday, October 11, 2009
I have started a new project with a Sh2-101, the Tulip Nebula.
So far, from three nights, I have only four twenty minutes exposures. Weather has been very volatile up here.
I will shoot more H-alpha and other channels for this object later.
Two color chemes, HST Palette as S-II=Red, H-a=Green and O-III=Blue. Second image is in natural colors composed from narrowband data. Channels are balanced so, that image match to visible spectrum, H-a + 24%S-II=Red, O-III=Green and O-III + 15%H-alpha=Blue. - Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
Telescope, Meade LX200 GPS 12" @ f4.65
Camera, QHY9 Guiding, SXV-AO @ 11Hz Exposures: H-alpha 4x1200s Binned 1x1
Color information is taken from much wider fiels image of Tulip Nebula.
Imaging details here: