Monday, September 29, 2008
Butterfly in Narrowband Stereo
G(H-a)B(O-III)+PARALLEL+VISION.jpg)
Parallel Vision image pair G(H-a)B(O-III)+CROSS+VISION.jpg)
Cross Vision image pair -
For viewing istructions, please, look at the menu on the right hand side of the page.
Sunday, September 28, 2008
Butterfly Nebula, Colors of Autumn
I made some tests about colorbalance. I looked more closely
O-III channel and compared it to the H-alpha channel.
There was some large scale differences between those two.
This experiment is done to make those differences more visible.
Green channel is synthesized from O-III and H-alpha channels.
I think, this color scheme is very suitable for season up here.
Butterfly Nebula in 3D-stereo pair
First image pair is for "Parallel Vision" method.
Second one is for "Cross Vision" method.
Viewing instructions can be found here:
http://astroanarchy.blogspot.com/search/label/Stereo%20image%20viewing%20instructions
Saturday, September 27, 2008
Butterfly Nebula, second try
O-III = Blue. Green channel is Synthesized from Red and Blue.
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Conditions were not too good last night, hard wind and clouds.
Guiding was really difficult doe the wind but PHD-guiding software does its best.
There was jus enough gaps between clouds, that I managed shot data for H-alpha
and O-III not enough though.
Actually part of the frames are shot trough not so thin clouds, maybe
H-alpha acts as a cloud filter : )
S-II data had to be left to the next time after the clouds rolled in.
Part of the NGC6888 the "Crescent Nebula" can be seen in the bottom of the image.
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Imaging data:
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Camera,
QHY8
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Filters,
Baader 7nm H-alpha and Baader 8,5nm O-III
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Optics,
Tokina AT-X 300mm @ f2.8
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Exposures,
5 X 1200s H-alpha
3 X 1200 O-III
+ flats and bias
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Guiding,
LX200 GPS 12" + PHD-guiding and Lodestar
H-alpha channel
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