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Table 1:

Photometric data for BVRI comparison sequence.

Star
V $\sigma_V$ $I_{\rm c}$ $\sigma_I$ $R_{\rm c}$ $\sigma_R$ B $\sigma_B$
A 15.052 0.037 12.570 0.041 13.782 0.026 17.160 0.051
B 16.084 0.032 14.279 0.031 15.124 0.028 17.569 0.039
C 16.749 0.030 12.595 0.077 14.614 0.043 19.962 0.124
D 17.080 0.031 14.440 0.039 15.747 0.035 19.241 0.087
E 17.090 0.030 14.362 0.036 15.729 0.035 19.226 0.080
F 17.508 0.045 12.625 0.071 15.166 0.060 20.535 0.176
G 17.718 0.038 14.627 0.041 16.152 0.034 20.221 0.176
H 17.740 0.038 15.541 0.033 16.653 0.046 19.498 0.095
I 17.810 0.045 14.996 0.036 16.440 0.041 19.940 0.052
J 17.954 0.055 16.037 0.038 17.006 0.035 19.500 0.085
K 18.102 0.084 14.950 0.059 16.606 0.054 20.386 0.203
L 18.140 0.045 14.983 0.042 16.539 0.038 20.633 0.251
M 18.325 0.048 15.743 0.037 17.135 0.035 20.164 0.110
N 18.618 0.048 16.714 0.046 17.666 0.026 20.174 0.092
O 19.697 0.134 16.680 0.062 18.185 0.067 - -


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