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Table 2

Seeing (FWHM) in the z, i and r filters, effective area of the image, number of detected sources, 50% completeness limit in the z-band image, and number of primary ((iz) − σ(iz) > 1.3) and secondary (1.1 < (iz) − σ(iz) < 1.3) z ~ 6 LBG candidates in the four fields.

Field Filter Seeing FWHM Clean area Total objects Completeness limit Primary Secondary
[arcsec] [deg2] z TOT candidates candidates

J1030 z 0.64 ± 0.02 0.143 29151 25.2 14 10
i 0.70 ± 0.02
r 0.74 ± 0.02

J1148 z 0.79 ± 0.02 0.144 24447 25.0 8 3a
i 0.87 ± 0.02
r 0.93 ± 0.02

J1048 z 0.84 ± 0.01 0.143 24087 25.0 6 9
i 0.87 ± 0.02
r 1.04 ± 0.02

J1411 z 0.73 ± 0.01 0.145 26055 25.0 11 8
i 0.77 ± 0.01
r 0.80 ± 0.01

Notes.

(a)

In the J1148 field an object that just barely misses our selection criteria for secondary z ~ 6 LBG candidates (i.e. it is undetected in the rband, has ztot = 23.4, but has (iz) − σ(iz) = 1.06), was proven to be a z = 5.7 AGN (Mahabal et al. 2005).

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