Now I need to know how do I "set Guide up to show V magnitudes"?

Also, everytime I change star fields in Guide, will I need to
redownload B1.0 from the internet or is all the info stored
someplace that I can refer to it?

--- In guide-user@yahoogroups.com, Bill J Gray <pluto@p...> wrote:
> Lawrence, I've written up a short summary of what you can
> expect to find in UCAC-2 at
>
> http://www.projectpluto.com/datasets.htm#UCAC2
>
> how to use it in Guide at
>
> http://www.projectpluto.com/update8.htm#ucac2_display
>
> and how to use it in Charon at
>
> http://www.projectpluto.com/charon.htm#ucac2
>
> As to whether UCAC-2 really improves astrometry: the answer
would
> appear to be YES, in large letters set in flaming type. I
describe
> (at the first of the above URLs) a few cases where you might want
> to use other catalogs, but I'd expect such cases to be very rare.
>
> Jerry, you mentioned getting GSC-2.2 data via Internet in an
> earlier message. You can get USNO data in the same manner, using
> "Get A2.0 via Internet" or "Get B1.0 via Internet". These give
> B and R magnitudes. If you set Guide up to show V magnitudes
> (the default), then it will compute V from those B and R
magnitudes;
> click on a star, and you'll get data in all three bands. You
> can then compute B-V data.
>
> Be warned that such data is generally not at all reliable.
> For variable star work, I strongly recommend looking to get
> photometric data elsewhere if at all possible; the values
specified
> in the USNO catalogs are vague indications, nothing more.
>
> -- Bill