[Aavso-photometry] First timer

[Bill Dillon]

Jim Roe wrote:
....
> I'm using Maxim DL to reduce the data and the fainter companion star is 
> right smack in the middle of the background annulus.  I understand that 
> Maxim lops off the brightest 10% and faintest 10% of the pixels in the 
> annulus, so maybe it isn't a problem?

I've found it *can* be a problem -- at least with the version I'm using.

As Richard notes, you can expand/contract the gap to minimize the number 
of stars in the sky annulus.  Experiment and see.

--Bill