Tuesday, September 24, 2013
Autumn season 2013 opened finally!
Last night I was able to open up my imaging season. After six months mandatory summer pause, it's great to be back!
As usually, this first light for the season is more like a test shot. I need to re collimate my optical path and fine tune my gears for optimal image quality.
A closeup of the Butterfly Nebula
First light for the Autumn season 2013
Image is in mapped colors, from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Image in visual spectrum
Orientation
Area of interest is marhed with a white rectangle. More info about this image in HERE.
Technical details:
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 33 % weight
Levels, curves and color combine in PS CS3.
Optics, Meade LX200 12"
Camera, QHY9
Guiding, Starlight Express active optics unit, SXV-AO, and lodestar guider.
Image Scale, ~0,75 arcseconds/pixel
H-alpha 7x1200s, Binned 1x1 = 3h 20min.
O-III and S-II channels are from an older wide field image HERE.
A single calibrated 20min. H-alpha light frame
Image is calibrated with darks and a bias corrected flats. No other processing but nonlinear stretching.
A single calibrated 20min. H-alpha light frame
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