Table 7: Secondary standard stars used for photometric referencing.
NN B $R_{\rm c}$ H $_{\alpha}^{AB}$ NN B $R_{\rm c}$ H $_{\alpha}^{AB}$
  mag mag mag   mag mag mag
1 19.91 19.24 19.35 5 22.84 21.40 21.63
2 21.10 20.23 20.37 6 23.04 22.46 22.88
3 22.07 20.47 20.57 7 22.98 20.43 20.35
4 21.27 20.71 21.52 8 24.05 23.32 23.23

Errors are $\pm$0 $.\!\!^{\rm m}$03 in the B and $R_{\rm c}$, and up to $\pm$0 $.\!\!^{\rm m}$05 in the H$_{\alpha }$ bands.

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