Sunday, November 22, 2009
Soul Nebula closeup finalized
After a long, frustrating period, we finally had kind of clear skys!
Actually, I started my imaging session Three times last night and back everything up at between.
Weather was so volatile, since misty clouds from open see are impossible to predict.
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After all I was able to capture more H-alpha and enough O-III and S-II to build a decent three band narrowband image.
Two versions , as usually, first one in HST-palette and the Second one in "natural colors" mixed from same material as HST-image.
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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.
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Telescope, Meade LX200 GPS 12" @ f4.65
Camera, QHY9
Guiding, SXV-AO @ 11Hz
Image Scale, 0,8 arcseconds/pixel
Exposures:
H-alpha 16x1200s Binned 1x1
O-III 3x600s, binned 3x3
S-II 9x600s, binned 3x3
Top of that, some color data from an older wide field image is used.
Wider view to the Soul Nebula. Area of the current image is marked with a frame. -
A Starless version of the Nebula.
I place it here, since it looks kind of nice and the actual Nebulosity can be seen better this way.
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