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Tuesday, August 30, 2011

NGC 2070, the "Tarantula Nebula", reprocessed




Since my processing technique gets better and the time of year doesn't give any support, I have reprocessed some older images. There is now star colors added and other processing is tweaked too.


The Tarantula Nebula, in Dorado

Ra 05h 38m 38s Dec -69° 05′ 07″


NGC 2070 in HST-palette 
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.


I redid the processing and composition for this southern target. Original version, with wider field, can be seen here: http://astroanarchy.blogspot.com/2010/09/ngc-2070-tarantula-nebula.html

Tarantula nebula, NGC 2070, also known as 30 Doradus, is an ionized Hydrogen region in the Large Magellanic cloud, visible in southern hemisphere. Distance from Earth is about 160.000 light years,
it's the most active and largest starburst region known in local group of galaxies.
Image is taken with a Northern Galactic groups remote telescope in Australia.


Natural color composition from the emission of ionized elements, R=80%Hydrogen+20%Sulfur, G=100%Oxygen and B=85%Oxygen+15%Hydrogen to compensate otherwise missing H-beta emission.
This composition is very close to a visual spectrum.

The telescope and technical information:

16" RCOS ja Apogee U9000 camera. 
LRGB combo.
H-alpha 5x1200s, Dark and artificial Flat calibrated.
2 x O-III 1200s and 5 x 900s Dark and artificial Flat calibrated.
2 x S-II 1200s, Dark and artificial Flat calibrated.
Raw data is shared with "Team Finland"


Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations added 50% to non convoluted data
Levels, curves and color combine in PS CS3.

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