Since my processing technique gets better and weather doesn't give any support, I have reprocessed couple of older images. There is now star colors added and other processing is tweaked too.
Sh2-223, 224 & 225
This image is a very rare one. Two supernova remnants are visible in a same three degrees field of view.
Image is in HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
Total exposure time is about 20h with a world fastest camera optics, Canon EF 200mm f1.8 with full aperture.
A special processing technique of mine is used to process this extreme dim data:
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.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
Original version with technical details:
Simeis 147 aka Sh2-250
My second reprocessed image is a Supernova remnant in constellation Taurus.
Original image of this very dim and large object was selected as an Astronomical Picture Of the Day, APOD, by NASA.
NASA, Astronomy Picture Of The Day
http://apod.nasa.gov/apod/ap090131.html
Image is in HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
Original version with technical details:
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.
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