Affiliation
American Association of Variable Star Observers (AAVSO)
Thu, 03/02/2023 - 00:16
Hello,
A newbie question here: where do I find information about the color of a given comp star (CCD photometry)?
VPHOT tells me which comp stars are in a given field but I couldn't find the color data about them.
Thanks,
Ari
The Variable Star Plotter (VSP) Photometry Table provides the mags of the comps in all selected filter bandpasses and also reports the B-V color. Take a look. By default it shows V mag and B-V.
Thank you, Ken!
BTW, in vphot, if you open the Measurement Details page for a specific comp, you can 'edit sequence' and see the reported mags of the comp. It is easy to calculate B-V in your head.
It would be nice if B-V could be plotted for the comps on the chart (makes finding a comp with similar color as the variable a bit easier).
Keith
Keith:
I think that additional info might generally be too crowded and perhaps confusing? Don't you?
So, you are left with looking at the chart's photometry table.
Ken
No not really to my eyes, but definitely not a big deal to cross-reference the table.
Keith