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Saturday, November 14, 2015

IC 1936, a closeup

I have spent most nights at this Autumn season by shooting dim targets around Cygnus.
At night of  2. November I shot few frames from a brighter target, IC 1396, in Cepheus. Just one hour of H-alpha light and one 20 min frame for O-III and S-II before clouds rolled in. Just got the data processed and the photo turned to be kind of nice, so I'm publishing it here. This is a second photo out of IC 1396 at this Autumn. The first one from the Elephant's Trunk Nebula can be seen HERE.

IC 1396
Click for a large image

Natural color composition from the emission of ionized elements.

IC 1396 in mapped colors
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Image in mapped colors from the light emitted by ionized elements. 
Red=Sulfur, Green=Hydrogen and Blue=Oxygen.

Orientation in IC 1396
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More info about this image can be seen HERE.

Orientation in constellation Cepheus
Click for a large image (3000 pixels wide)

A ten panel mosaic image of Cepheus, exposure time 92h. More info about this image can be seen HERE.

Technical details

Processing work flow

Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 21 iterations, added at 25% weight
Color combine in PS CS3
Levels and curves in PS CS3.

Imaging optics
Celestron Edge HD 1100 @ f7 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
H-alpha, 3 x 1200s = 1h
O-III, 1 x 1200s binned = 20min.
S-II,  1 x 1200s = 20min.
Total 1h 40min.

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