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Not understanding why the image still presented fairly noisy even after 9hrs exposure, I went through the subs one by one to gauge what was going on. It seems in my over zealous nature, I began imaging NGC253 at about 30~35° elevation..
The subs taken early on each night all displayed 3 distinct differences from the ones taken later in the night/early in the morning.
A - FWHMs were above 5 as opposed to 3.0~3.4
B - Sky background was measured much higher
C - Colour balance was severely skewed...
What have I learned.. In suburbia, dont image until the subject hits 45° and is clear from the surrounding skyglow.
In any case I got 15 more subs last night with the AO unit bolted to the front of the SBIG this time... the FWHM's on those subs is far superior to the ones previously captured.
Guiding at 5Hz I found I was easily able to get guide stars everywhere I pointed the scope (advantage of OSC camera rather than guiding with filters)
Here is 6hrs worth of the 11.4hrs data I have, I rejected the rest due to sky sky background and high fwhms. This is still not perfect, and there is still noise present (Im capturing new darks at present)
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