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Tuesday, October 11, 2016

A little different view to the North America nebula, part II

Yesterday I published a new photo out of the North America Nebula. I had some extra exposures for it since at first I used a wrong image position. Images are overlapping so I was able to build a small two panel mosaic.

A detail from the North America nebula as a two panel mosaic
Please, click for a large image

Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen.

An experimental starless version as a vertical composition
Please, click for a large image

There is a somehow eerie feel in this starless version

Please, click for a full size photo

Area of interest is marked as a white rectangle 

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 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f10 with 0,7 focal reducer for Edge HD 1100 telescope

10-micron 1000

Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x2 and SXV-AOL

Astrodon filter, 5nm H-alpha
Astrodon filter, 3nm O-III
Astrodon filter, 3nm S-II

Exposure times for both panels
H-alpha, 9x 1200s = 5h
O-III, 3 x 1200s binned 2x2 = 2h 
S-II,  3 x 1200s binned 2x2 = 2h 
Total 9h

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