Thursday, February 18, 2010
Starting a new project, IC 443
Last night I started a new imaging project with the IC 443, supernova remnant in Gemini.
Not a very promicing start though, I got less than two hours of usable data after spending whole night shooting it. There was lots of thin upper clouds and they ruined majority of my frames. I'll shoot more H-a, maybe 6-7 hours, Sulfur and Oxygen as well.
I will test a new imaging system with this objet, I call it "VARE" Variable Resolution imaging. The idea is shoot part of the data binned 1x1, like an example here, and rest of it binned down to 2x2 - 4x4.
By that way, I can use high S/N details from a 1x1 binned image and low S/N areas from other bin modes.
Using binning is basicly same as use of the faster optical configuration, I have much greater sensitivity at cost of resolution. For example if I bin camera down 3x3, I have allmoust nine times more sensitivity!
I will write a tutorial about VARE-method, after I have tested it.
Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO @ 7Hz
Image Scale, 0,75 arcseconds/pixel
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Exposures:
H-alpha 5x1200s, binned 1x1, Flats. Bias and Darks
Wednesday, February 17, 2010
Planetary Nebula in Constellation Lynx
Red=S-II, Green=H-alpha and Blue=O-III
Finally, after a long period of bad weather, I was able to shoot more H-a, O-III and S-II channels.
Seeing was not too bad but the transparency was very poor. This is an object with a very low surface brightness and bad transparency eated out some signal.
Due the low brightness this objet is not commonly imaged, even though it has a largish angular diameter to a planetary nebula. (6'.67" x 6'.67")
Processing work flow:
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack.
Deconvolution with a CCDSharp, 30 iterations.
Levels, curves and color combine in PS CS3.
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Telescope, Meade LX200 GPS 12" @ f5
Camera, QHY9
Guiding, SXV-AO @ 9Hz
Image Scale, 1,5 arcseconds/pixel
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Exposures:
H-alpha 14x1200s, binned 2x2 and 7x1200s, binned 3x3
O-III 2x600s, binned 4x4 and 1x1200s, binned 4x4
S-II 3x600s, binned 4x4 and 1x1200s, binned 4x4
Tuesday, February 16, 2010
An Universe Today article, Stereo "Soul"
An Article by Tammy Plotner.
At this time Universe today published an article based on my volumized closeup visualization of a "Soul nebula".
Klick HERE, to see an articel in Universe Today.
The original image with details:
http://astroanarchy.zenfolio.com/p1072219942/h12739e52#h12739e52
A 3D-animation for those, who has difficulties to see Stereo image pairs:
http://astroanarchy.blogspot.com/2010/01/new-3d-animations-from-deep-space.html
The original image with details:
http://astroanarchy.zenfolio.com/p1072219942/h12739e52#h12739e52
A 3D-animation for those, who has difficulties to see Stereo image pairs:
http://astroanarchy.blogspot.com/2010/01/new-3d-animations-from-deep-space.html
Thursday, February 11, 2010
Astro photographing in Finland
This it is...
Lots of snow and clouds in winter 2010.
I bet, if I'll start to shoot snow and clouds, we dont see them anymore.
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