Initial Experiments with Continuum Subtraction of Halpha Images

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Halpha with DDP processing 

Important: DDP applied only for accentuating the contrast in the display image, it was not applied to images used in the continuum subtraction process prior to subtraction

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M33 Continuum with DDP processing

Continuum subtracted Halpha with no offset applied and with DDP

Continuum subtracted Halpha with 1000ADU offset applied before sub and with DDP

Comparison showing difference (click to enlarge)

Data taken January 4, 2007 from my backyard in Castro Valley, Ca.

Custom Scientific Red Continuum filter used

Custom Scientific 3nm Halpha filter used.