Table 6: Average parameters for all photometric solutions and constraining the sample to the 3-parameter fits. The table gives: in Col. 1 the passband/filter combination; in Col. 2 the median zeropoint in Vega System (Zp) including solutions obtained from fits with an arbitrary number of free parameters; in Col. 3 the scatter computed from the distribution of zeropoints (rms); in Col. 4 the largest offset of a night calibration relative to the median reported, $(\Delta Zp)_{\max}$; in Cols. 5-7 the same as in the three previous columns, except that now the estimate of the median is computed using only 3-parameter fits.
Passband Zp rms $(\Delta Zp)_{\max}$ Zp rms $(\Delta {\rm Z}p)_{\max}$
U#877 22.02 0.27 -0.72 22.06 0.22 -0.68
U#841 21.58 0.08 0.11 - - -
B#842 24.64 0.08 -0.21 24.58 0.05 -0.27
V#843 24.18 0.08 0.16 24.23 0.1 0.21
R#844 24.52 0.08 -0.17 24.49 0.09 -0.2
I#879 23.34 0.02 0.02 23.35 0.0 0.03
I#845 23.14 0.11 -0.3 23.18 0.13 -0.26

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