[AZ-Observing] Re: NGC206 Enhanced Hydrogen Comparison

  • From: Chris Schur <comets133@xxxxxxxxx>
  • To: az-observing@xxxxxxxxxxxxx
  • Date: Tue, 12 Dec 2006 12:13:57 -0800 (PST)

Hey, that might work.  I will rush home tongigh and
give it a try!  THANKS.

Chris
--- Brian Skiff <bas@xxxxxxxxxx> wrote:

> >>  ...I would need of course a red filter
> >>  that excludes hydrogen alpha.
> 
>      Not true.  See any of the large number of
> papers in the
> professional literature that obtain H-alpha images
> just in the
> manner I described.  The problem is that the H-alpha
> filter is
> not so narrow that it excludes the red continuum. 
> So you subtract
> out of the H-alpha image some fraction of the flux
> using the
> broadband red image.
> 
> \Brian
> --
> See message header for info on list archives or
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> 


Take Care,

Chris
Astro: http://www.schursastrophotography.com
Robotics: http://www.schursastrophotography.com/roboticsmain.html


 
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