color terms for Rochester Mark IV

[Stupendous Man <richmond@a188-l009.rit.edu>]

  I've taken images of the stars in SA 110 and SA 112 calibrated 
by Landolt.  Based on a photometric solution which includes about
90 measurements in each passband, I find the following color terms:

            V  =  v  -  0.046 * (v - i)
            I  =  i  +  0.055 * (v - i)

My photometric solution doesn't use extinction: instead, it assigns
each frame a different zero-point, which removes the bulk of the
atmospheric extinction (the differential extinction across the frame
is small enough that I can ignore it for these rough purposes).

  It's good news: the natural response of the TASS systems is 
pretty close to the Johnson-Cousins V and I passbands.  

  What I've discovered is that I need to find a better set of 
calibrators.  There aren't all that many stars in either SA 110 or 
SA 112 which are bright enough for my Mark IV to get a decent signal
in a 60-second exposure.  What I'd really like is a dense set of 10 or
so stars within a single 4x4-degree field, with good calibrated
magnitudes, in the range 7 < V < 10.  

  Anyone know of such fields?

                                        Michael Richmond