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Fig. 2

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Comparison between the SFRs derived from the SED fitting and the SFR based on Hβ. The dashed line shows the 1:1 relation along which the two estimators agree perfectly. The red circles are unlensed AMAZE galaxies at z ~ 3.4. The red diamonds are the three lensed sources at z ~ 3.4. The red empty square is the lensed galaxy at z = 4.8 for which Hβ emission has been inferred from [OII]3727 by assuming the [OII]/Hβ ratio appropriate for its metallicity (see Appendix B). The red crosses show the LSD galaxies. Black filled circles show the SFR(Hβ) averaged within bins of SFR(SED). The cyan bin is composed of the two lensed galaxies LnA1689-1 and LnA1689-4. The error bars on the binned values correspond to the dispersion of the SFR within each bin. The error bars in the top-left corner indicate the average uncertainties on the measurements of SFR(SED) and SFR(Hβ) for the individual objects.

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