[Aavso-photometry] BRI Comp Star Value when reporting OBS is the Chart V value?
waltc at cox.net
waltc at cox.net
Fri Jun 22 13:38:48 EDT 2007
Sorry, I thnk it is in the PCObs interface and not WebObs that you can submit measures as differential and then it adds the magnitude of the comp star so that what goes into the database is the absolute magnitude. I have seen where people were not clear on this functionality and submitted with this button incorrectly clicked. They then submit a magnitude estimate of say, 10.0 and a comp star of say, 10.5, and the database comes up with a value of 20.5 for the target star magnitude. In the case we discuss here, a person would click the button correctly if submitting differential mags but that magnitude would be added to a "label" rather than a real magnitude in the correct bandpass.
-Walt
---- arne <arne at aavso.org> wrote:
> 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
More information about the Aavso-photometry
mailing list