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Tuesday, July 29, 2008

Comparison of Flame Nebula, with and without stars

This is an example of star removal technique.
Two images of the same target is presented here with and
without stars.
In starless image, the nebulosity is much more visible and some
forms can be seen only in this image.
This can be usefull technique to reweal very faint nebulosity hidden
in overwhelming starfields.
Click for large image.

Thursday, July 17, 2008

Sh2-240 Reprocessed

This was really hard to catch and process.
Somehow better now, I think.
The Sh2-240 (Simeis 147) is a very faint supernova remaint in Taurus. The image is in false color to show hydrogen alpha emission.Original BW H-alpha image at the bottom
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IMAGING DETAILS
-Optics: Canon FD 200mm f2.8 lens with full aperature - Camera: QHY8 - Platform and guiding: LX200 GPS 12" with QHY5 guider and PHD-guiding - Exposures: 10 x 3600s + 4 x 2700s + 3 x 900s H-alpha + Flats and Bias frames, no darks exposure time so far 13h 45min. - Filter: Baader 7nm H-alp + IDAS LP for RGB

H-alpha

Wednesday, July 16, 2008

Veil Nebula, Western part (reprocessed)

Veil Nebula is a supernova remnant with large angular diameter.
Located about 1400 light years away in the constellation Cygnus.
This is a reprocessed version from Autumn 2007.
ED80 + QHY8, guiding LX200+QHY5, UHC-filter 4h+flats+bias.
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Eastern part of the Nebula can be seen here:

Tuesday, July 15, 2008

Who need Stars?

This is a just a test. Large gas clouds are located usually in dense star fields and bright stars are dominating the image, even in narrowband images. Sometimes it's difficult to see actual target from stars. In this test I removed stars from images by using several PS filters, like Minimum, Dust & Scratches and some other star reducing methods. - I think, in this way the actual targets and they forms are more visible.
Klick thumbnail for the large image.

"Bubble Nebula"

"Elephants Trunk" The core of the "Heart Nebula" "Andromeda Galaxy" IC1936 "North America Nebula" "Flaming Star Nebula" Part of the IC1848 "Soul Nebula" Sh2-240 "California Nebula" "Rose Nebula" "Hart and Soul" Wwil Nebula Western part Weil Nebula Eastern part

Friday, July 4, 2008

More repocessed material

M82 with H-alpha light to show massive outburst of hydrogen gas
from galaxy core.
Details in original post.

IC1848 (Part of the Soul nebula) in H-alpha light + RGB data trough UHC-s filter.

Details in original post.

M106, details in original post.

Tuesday, July 1, 2008

California Nebula Reprocessed

This version is combined from two images of the same target.Images are taken with different optical configurations. First was taken with SW 80ED refractor and second with Canon EF 200mm f2.8 camera lens. CCDstack software was used to combine those two images and here is the result.