Tuesday, October 26, 2010
Planetary Nebula NGC 246
A Planetary Nebula, NGC 246, in constellation Cetus.
Luminance is mixed from Broad band Luminance and H-alpha. Colors are mixed from narrow band channels,
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.
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
There was almost no emission in S-II channel.
Technical details:
16" RCOS ja Apogee U9000 camera.
Lum +H-a, O-III and S-II combo. An Australian remote telescope
4x600s for the Luminance
3x1200s H-alpha
1x1200s O-III
1x1200s S-II
Dark, Bias and Flat calibrated.
Raw data is shared by Petri Kehusmaa and J-P Metsavainio
Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations, added at 50% weight.
Levels, curves and color combine in PS CS3.
Wednesday, October 13, 2010
Tucanae 47, a Globular cluster, reprocessed
LRGB image of Tucanae, NGC 104, globular cluster in constellation Tucana.16700 light years away from Earth and 120 light years across. Image field is about 30' x 30', half a degrees.
I did reprocessed this image, since at the time I didn't have good and functional calibration files.
RCOS ja Apogee U9000 camera.
LRGB combo.
Luminance 12x300s and 8x150s, Dark and Flat calibrated.
Red 5x300s, Dark calibrated
Green 5x300s, Dark calibrated
Blue 5x300s, Dark calibrated
Raw data is shared with Petri Kehusmaa and J-P Metsavainio
Processing workflow:
Image acquisition, MaxiDL v4.xxx
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 10 iterations
Levels, curves and color combine in PS CS3.
Monday, October 11, 2010
Horse Head Nebula, an annoying preview
Horse Head Nebula, Barnad 33 and IC 434, is a dark nebula in constellation Orion. Image is taken from "down under". In Australia this nebula has a higher elevation, than here at 65N.
Why annoying?
This image is a composition of 3 x 1200s H-alpha light. With this modest exposure time, image is far better, than I have managed ever taken up here with a longer integration time, that's annoying!
A false color H-alpha
We will shoot more data for this object in near future. LRGB and more H-a, maybe some O-III and S-II to see, if there is any.
The telescope and technical information:
16" RCOS ja Apogee U9000 camera.
LRGB combo.
H-alpha 3x1200s, Dark, Flat and bias 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.
Saturday, October 9, 2010
NGC300 as a 3D stereo pair
Parallel vision
Cross vision
Other 3D-formats can be found here:
Original 2D-image and details:
NOTE! This 3D-study is a personal vision about forms and shapes, based on some known facts and an artistic impression.
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