[Aavso-photometry] BRI Comp Star Value when reporting OBS is the Chart V value?

arne arne at aavso.org
Fri Jun 22 13:32:07 EDT 2007


waltc at cox.net wrote:
> Arne, 
> 
> Doesn't this run afoul of the differential magnitude functionality?  If you check that then I thought webobs added your differential magnitude to the number in the comp star box.  If what is in the comp star box is not a real magnitude in that bandpass but a "label" then the calculated number is wrong.
> 
> Signed - someone who hasn't been doing it this way (Walt Cooney) 
> 
Not sure what you mean here.  All target magnitudes are "absolute",
where you have taken the differential result and added the standard
magnitude of the comp star.  Differential measures don't show up anywhere.
Arne


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