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M104
Sombrero Galaxy, 6.5.2003 (5.5.2001, 22:10 - 22:49UT)
Resolution: 1.92 arcsec/pixel
Camera: Vesta 675SC2 at prime focus
Telescope: 8" F6 Orion Europa Newtonian
Result focal ratio: F6
Exposure: summing 54x40s (gain 100%, Amp OFF), 12xDF
Seeing: moderate
Captured and summed in K3CCDTools,
postprocessed by Neat Image.The galaxy is
about 50 million light years far away from the
Earth.
It was nice experience with my Vixen GP-DX mount
- all 54 captured frames were good for stacking,
although exposure was even 40s in prime focus! It
was not possible to do such long exposures with
my GEM1 mount before. I haven't lost any minute
from my observing time by bad frames (because of
poor tracking).
Processing:
1, 54 frames captured by K3CCDTools
2, preprocessed by AVIDark and summed in K3CCDTools
3, 2 output images were created -
the first one with soft histogram and gamma 1.70
and the second one with strong histogram
stretching and softer gamma of 1.30.
4, These 2 images were processed by Neat Image (noise
reduction 30%)
5, Result 2 frames were summed in K3CCDTools
again
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