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Monday, November 17, 2008

From Sharpless Catalog, Sh2-142

Last night, after long cloudy period, there was three hours opening
in the clouds, so I continued the Sharpless catalog object hunting.
I managed to shot H-alpha channel for Sh2-142 object, seen
in midle of image, hence B&W version.
I'll shoot S-II and O-III channels, when weather up here allows.
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I made a small mosaic with the previous targets H-alpha
channel to show Sh2-142 and Sh2-157 relative positions to each other.
(Scroll down for Sh2-1157 imaging data)
More info, about Sh2-142, can be found here:
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Imaging data:
Camera, QHY8
- Filters, Baader 7nm H-alpha,
- Optics, Tokina AT-X 300mm @ f2.8
- Exposures, 5X 1200s H-alpha, + flats and bias - Guiding, LX200 GPS 12" + PHD-guiding and QHY5

Sunday, November 16, 2008

Stero Image Pair Action


ACTION REMOVED BY THE AUTHOR.
New version is under construction, might take a while though...


NEW VERSION, Download HERE

-Generates two, Parallel and the Cross Vision, versions
- Better star size handling
- Some minor improvements
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Here is the first version of stereo image Action.
Primary usage is for Nebulae.
Please, let me know if it's working. This is originally made for PS CS3, but it might work with older version as well. - This Action generates a Parallel View version of Stereo Image. If you need the Cross Vision version, just flip the images in the opposite order, Left image to Right and Right image to Left.
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NOTE
This action generates a temporary image in
the C: root named "Starless copy.psd"
You might want to delete it manually later.
NOTE2
This action has to be placed in the same folder with previous "StarRemove1"
action, to make it work right!
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If some problems occurt, you might like look help from
CloudyNights group, here:
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There has been lots of work to develop this kind of technic. If you feel, you like to support my work, please, use a donate Button in the Right hand side Menu. Thank You!

Friday, November 14, 2008

Star Removal PS action, klick the image to download



OBSOLITE PAGE, PLEASE, DOWNLOAD THE STAR REMOVAL PS ACTION FROM HERE: Star removal PS Action






Many astroimagers had asked me to reveal the method of removing Stars.
It's sometimes very usefull to be able to remove stars from the image.
Some dense Starfields can cover nebula details or the Star bloat can cause
problems with narrowband color mixing.
I have now made a PhotoShop Action for StarRemoval!
NOTE! The primary use is for Nebulae!
It might or might not work with Galaxy images
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It has not been tested, so if there is problems or not, please leave a comment.
There might be some large stars, or fracments of them, in the image
after action. They are easy to remove manually.
The action result can vary, depending many factors, Star size, density, etc...
If you like, you cant tweak the parameter in the action for better result.
Or you can use just some part of the action. Be free to experiment.
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In my tests I noticed, this works very well to undersampled images >
usuall wide fields one. And there the dence stars are really a problem.
To be sure, that no wanted information is lost, place the starless
image as a layer top of the original and blink.
Then use eraser to restore brighter details.
If you set the transparency, let's say 50%, you can have part of the both worlds.
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In Cloudynights CCD-imaging group, there is some feedback of this action.
You can find help in there as well, if you have had some problems.
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There has been lots of work to develop this kind of technic.
If you feel, that you like to support my work, please, use a donate Button in the Right hand side Menu.
Thank You!

Tuesday, November 11, 2008

NGC1499, the "California Nebula" as a Stereo pair



This target reveals new structures in emission line imaging.
I made this presentation to show, how to I see, the structure
of this beautiful nebula.
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Triple ionized Oxygen (O-III) signal was weak,
it can be seen as a Blue in the image. It seems to reach up to bright
star "Menkib" (HIP18614).
Menkib is energizing the strong emission from NGC1499,
outburs of O-III looks like relating to it.
Very interesting, but I don't know is this well known phenomen.
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As usual, there is two versions. One for parallel vision, and the other one for cross vision methods. Thats because some part of the viewers can see one of the method in 3D, but not the other. (I can't see cross vision images - How to see this in 3D? Please, look for the right hand side menu for instructions.
Klick this image, if you can't see either of the stereo methods above. This is a animated image showing steroimage as a small animation. It will gives an idea, what can be seen in stereo images.
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Link to the original imaging data and the image: