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Sunday, October 11, 2009

Info Post






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.



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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.
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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.



ph

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