Quote:
Originally Posted by Merlin66
Bert,
1. Using very narrow band filters <4nm will allow the recording of emission wavelengths without allowing to much extraneous starlight getting through.
2. The equivalent of the Astrondon Red Continuum, may be available centred on other wavelengths - blue? green?
Using these would allow more control over the corrections applied to the stellar light by suppressing at blue/ green wavelengths as well as the red end....
Just my 2c
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I might be misunderstanding you but wouldn't the continuum filter be at the red end of the spectrum because the only broadband light getting through the narrowband HA filter is the red light. Subtracting blue and green continuum light from the HA image would over subtract the stars.
Would I be right thinking that if the red continuum has been subtracted from the HA frame then any stars remaining would be the HA emission from the star?
I have a background in spectroscopy (ICP specs) but havn't thought about this idea before. Very interesting.