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Faint emission nebulas in Tucana: NGC 456, 460, 465 and many others
Help!
This HOO image goes deep, perhaps far too deep for my heavily light polluted sky in suburban Sydney. I am confident of the reality of the brighter nebulas including the many tendrils, but I am not convinced about the reality of all the faint background H alpha nebulosity. Possibly, some of the structure in the surrounding nebulosity was conjured by small errors in the flat field light source, or more likely the impossibility of accurately correcting the complicated distribution of light pollution gradients accumulated when integrating over many long imaging runs.
Does anyone know of a very deep image of this field I could use as a reference? I would feel a little more comfortable with a reality check.
I can suppress the background nebulosity to help isolate the main nebulas if need be.
Technical Details:
Televue NP127is f/5.2 Refractor working at f/4.2, Astrodon 3-nm H alpha and OIII filters for the nebulosity and Astrodon RGB filters for the stars, QSI 683wsg Camera.
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