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Friday, September 10, 2010

Opening image of the Autumn season 2010



Close up of the NGC 7000, the "North America" nebula.
Image is composed from O-III and H-a narrowband channels to a bi-color image.
This palette is close to a visiblel spectrum.

Last night we had about three hours of astronomical darkness, up here 65N.
I'll shoot more H-alpha and the S-III channel later.

An experimental starless version to show the actual nebula

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" @ f5 
Camera, QHY9 Guiding, SXV-AO @ 6Hz 
Image Scale, 0,75 arcseconds/pixel 
Exposures H-alpha 7x1200s, binned 1x1
O-III 1x1200s binned 3x3

Notes.
I had some problems with the camera orthogonality. Due that, stars at to and bottom are stretched.
I'll re shoot this material again after I have fixed the problem. 


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