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Table 1

BDF – observations.

Filter Instr. Exp. Time (s) Seeing (arcsec) Mag. Limita

V-High FORS2 13 800 0.75 29.1
R-Special FORS2 11 600 0.63 29.3
I-Bessel FORS2 4800 0.70 27.8
Z-Gunn FORS2 64 800 0.59 28.6
Y-Open HAWK-I 56 940 0.52 28.3b
J-Open HAWK-I 18 720 0.54 26.5
Ks-Open HAWK-I 30 060 0.44 26.0

Notes.

(a)

(S/N = 1;

(b)

Y = 26.5 at S/N = 5.

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