Online Material

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Figure 1: Spectra obtained for the CORALS QSOs at the AAT (RGO spectrograph), ESO 3.6-m (EFOSC), and VLT (FORS1) facilities. Note that neither the higher resolution AAT spectra ( FWHM = 3 Å) nor the VLT ones are flux calibrated and the y-axis is simply relative counts uncorrected for instrument response and atmospheric transmission. The ESO 3.6-m data ( FWHM $\sim$ 7Å), however, were flux calibrated and the y-axis scale is in units of ergs s^-1 cm^-2 Å^-1. Vertical tick marks show the position and redshift of intervening DLAs, if present.

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Up: The CORALS survey I: bias