Date: Thu, 16 Mar 2006 10:59:34 -0800
From: Ben Davies <ben

I'm interested in establishing magnitudes and colors of a set of stars 
using the Stromgren system, so I need to locate uvby magnitudes for the 
set of standard stars, such as are readily available for Landolt stars. 

Looking at the Crawford and Barnes photometry, I am confused by the fact 
derivative?  Where are those passband magnitudes?  
printed the paper out and read it, but remain unenlightened.

I located individual Stromgren stars in the Lausanne/Geneva photometric 
catalog, but the V magnitudes given there look like Johnson magnitudes.  
example at HD 210049 in uvby.

If someone could set me on the right path here, I would be much 
appreciative!

Ben Davies
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