M 51 in Hydrogen Alpha
This was a "filler" Project. During the Full Moon in May I
decided to see if I could capture ultra narrowband (3 nm) Hydrogen data
during a full moon. I imaged before with narrowband filters
during full moons, but the 16803 camera captures a much wider field of
view and thus is subject to a more signficant gradient.
Another problem is Signal / Noise. I captured these at -30,
but the evenings were hot so the cooler was working flat out.
While the imaging took place during very dry skies there was
still stuff in the air to diffuse the moonlight.
click for a full size image
This was a single filter image so the processing was fairly
straightforward. The biggest problem was noise management.
The image was very noisy with low S/N but several passes of noise
reduction produced an acceptable image that shows the nebulosity.
|40 x 900
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