Table 2: Photometric secondary standards in the GRB 001109 field.
  RA (J2000) Dec (J2000) U B V R I
  h   m   s $^\circ $   $^\prime $    $^{\prime \prime }$          

1

 18 29 52.55 +55 16 37.8 18.62 $\pm$ 0.03 18.53 $\pm$ 0.08 17.95 $\pm$ 0.02 17.58 $\pm$ 0.02 17.25 $\pm$ 0.02
2 18 30 18.61 +55 16 46.6 21.02 $\pm$ 0.17 19.57 $\pm$ 0.04 18.49 $\pm$ 0.02 17.79 $\pm$ 0.02 17.16 $\pm$ 0.02
3 18 30 02.94 +55 17 03.2 19.24 $\pm$ 0.06 18.48 $\pm$ 0.07 17.55 $\pm$ 0.02 16.90 $\pm$ 0.02 16.36 $\pm$ 0.02
4 18 30 04.05 +55 17 33.7 21.31 $\pm$ 0.17 19.99 $\pm$ 0.05 18.97 $\pm$ 0.02 18.16 $\pm$ 0.02 17.52 $\pm$ 0.02
5 18 29 48.91 +55 19 20.5 20.26 $\pm$ 0.12 19.27 $\pm$ 0.06 18.33 $\pm$ 0.02 17.73 $\pm$ 0.02 17.25 $\pm$ 0.02
6 18 30 22.09 +55 19 36.9 19.16 $\pm$ 0.06 19.45 $\pm$ 0.02 19.03 $\pm$ 0.07 18.77 $\pm$ 0.02 18.45 $\pm$ 0.02
7 18 30 20.65 +55 19 40.7 20.63 $\pm$ 0.15 20.49 $\pm$ 0.08 20.05 $\pm$ 0.02 19.68 $\pm$ 0.03 19.27 $\pm$ 0.04
8 18 30 14.57 +55 20 43.3 19.54 $\pm$ 0.08 18.62 $\pm$ 0.03 17.28 $\pm$ 0.02 16.33 $\pm$ 0.02 15.30 $\pm$ 0.02


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