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Table 4

Properties of the filters used during the survey.

Filter λc (μm) Δλ (μm) T (%)

VLT/NaCo

J 1.27 0.25 78
H 1.66 0.33 77
NB2.12 2.122 0.022 55
NB2.17 2.166 0.023 52
K s 2.18 0.35 70

CFHT/PUEO

H 1.632 0.296 85
Fe ii 1.650 0.015 70
K 2.115 0.350 92
H2   (v = 1−0) 2.117 0.020 65
Brγ 2.169 0.020 70
K 2.198 0.336 90

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