[Aavso-photometry] Re: [AAVSO-DIS] Need Advice, CCD photometry;

[arne]

Dan wrote:
> Arne,
> 
> You're certainly right in your advice, however my intent was not to 
> start using any old algorithm out of the blue without knowing its 
> protocol and I'm well beyond a absolute beginner's  just shoot and hope 
> for the best.  The average / median combine had been a real issue for me 
> and Gralack's approach (SD mask) made plenty of sense so I decided to 
> seek further advice from other users in this forum. 
> 
> I plan to follow the photometry procedure outlined in the AAVSO's CCD 
> manual section 5.7 with the details filled in by "Computing and using CCD
> transformation Coefficients prepared by Lou Cohen" and "CCD transformation
> equations for use with single image (differential) photometry by Bruce
> Gary."   Two weeks ago I started my research into  photometry beyond the 
> +-0.2 mag accuracy, I must confess it has been no easy task but tutorial 
> by tutorial you start to get certain methodologies, techniques, and the 
> need for consistency engrained!
> 
> tests tests tests, science at its best!  Tom, I'll let you know how the 
> results from the linearity tests go and I'm going to analyze them now.
>