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Tuesday, September 25, 2012

IC 1340 project as a bi-color from hydrogen and oxygen

Last night I got the ionized Oxygen, O-III, imaged. It'll show as a blue color in this bi-color image. This color combination is very close to visible spectrum, so image is in natural colors. Now I feel very tired, I stayed up all night long and couldn't resist to process this now. I will shoot the emission of ionized Sulfur later for three band color image. Total exposure time for now is ~10 hours.

IC 1340, Part of the Eastern Veil Nebula in Cygnus
RA: 20h56m 45.8s DE:+31 degrees07' 17"

Bi-color closeup image of Eastern Veil Nebula, IC 1340.
Colors are mixed R=H-a, G=O-III and B=O-III + 5%H-a

IC 1340 is part of the Veil Nebula, a supernova remnant in constellation Cygnus at distance of about 1470 light years. This is one of the more luminous areas in this SNR. Image is B&W, since it shows only a light emitted by ionized Hydrogen. The shock front formed by the material ejected from giant explosion, the super nova, can be seen in this image.

An experimental starless version to show the actual nebula better

An animation to show difference between H-alpha and O-III emissions

Hydrogen and the Oxygen are clearly separated 

Orientation image

Area of interest is marked as a white rectangle in this older wide field image above.

Technical details:

Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Levels, curves and color combine in PS CS3.

Optics, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO, an active optics unit, and Lodestar guide camera
Image Scale, ~0,8 arc-seconds/pixel
16 x 1200s exposures for H-alpha emission = 5h 20min.
12 x 1200s exposures for O-III, emission of ionized oxygen = 4h

IC 1340 in Eastern Veil Nebula. Image shows a starless version of pure ionized Oxygen, exp. time ~5h.
This is a second version of this photograph. It looks like an electric version of the Nike statue!


I made an animation about different components in my image.

In this animation, allthe components in my image of IC 1340 are separated.

Looks odd but it's very useful while processing the image, since operations can be done to single element in image without interfering other image components.
NOTE. There is absolutely zero data lost in this technique due to my processing method.
I'm using a "difference mapping" between images and all the removed components gets placed back byte by byte in final image!

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