Thursday, February 28, 2008
The Great Globular Cluster in Hercules, M13
M13 image is from 27.02., same night as previous IC 405 & IC 405 image.
Picture is scaled down about 50%
This one was hard to process doe massive light pollution defects,
gradient, LP noise and weak S/N ratio.
Imaging telescope:
LX200 gps 12" @ f6.3
Guiding:
SXV-AO @ 10Hz
Cameras:
QHY8 for imaging
Lodestar for guiding
Filter:
IDAS LP
Exposures:
9 X 900s = 2h 15min.
UPDATE
I did a new version.
This time I skipped two frames doe the bad quality.
Now there is 7x900s.
I also used CCDStack positive Constrain deconvolution,33 iterations.
Images are updated.
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