Correlations between the broadband magnitudes and the [Oii] flux. The contours represent the density of galaxies predicted by the weighted data (from dark blue to brown 10, 50, 100, 200, 500 galaxy deg^-2). The g band correlates best in the redshift range 0.7 <z< 1.1. The r magnitude correlates best in the range 1.3 <z< 1.6. The fluxes corresponding to a luminosity of 10⁴¹ and 10⁴² erg s^-1 and the mean redshift (0.9 and 1.3) are represented by dashed blue lines.