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Figure 1:
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Figure 2:
Left panel:
calculated colour-colour diagram based on Bruzual &
Charlot (1993) model galaxy spectra.
The filled squares are 0<z<0.6 galaxies with ages from a
few to 15 Gyr and the open triangles are
0.3<z< 3.0 galaxies
with ages from a few Myr to 1 Gyr. The dotted box contains all these
calculated galaxy colours. The full-drawn line corresponds to
objects having the same broad-band colours, but various amounts of
absorption (upper part) or emission (lower part) in the narrow-band filter.
Middle panel:
colour-colour diagram for all objects in the GRB field. The
squares with error-bars indicate objects detected at S/N>5 in the
narrow-band image. As expected, most objects have colours consistent
with being in the dotted box. However, a number of objects, including
the GRB 011211 host, are seen in the lower left part of the diagram.
Right panel: the colours of the seven LEGO candidates which are
selected to have
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Figure 3:
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