Re: USNO A2.0 "R"

[Michael Koppelman <lolife@bitstream.net>]

You can say that again. ;)

I mistakenly thought that it would be an easy source for R magnitudes. 
After digging deeper and thanks to people on this list, that is really 
not the case. I've switched to using Tycho magnitudes with much better 
luck. Is this equation:

Rc = V - 0.5 * (B-V)

...my best bet?

Welcome back, Arne! Photometry email is much more boring without you. ;)

Michael K.

On Tuesday, September 24, 2002, at 01:11 PM, aah@nofs.navy.mil wrote:

>   You need to understand the basic USNO-A catalog before you
> start using any of the photometry.