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CCD multi-object spectroscopy of galaxies at the UKST

A CCD detector system was built for use with the FLAIR multi-object spectrograph at the UKST. It is shown that using FLAIR, velocities can be obtained for ∼80 per cent of galaxies sampled uniformly to b J ≤ 16.75 mag. The velocity accuracy for absorption-line redshifts is typically ±150 km/s. These results apply to observations made in the blue (∼4000-5000 A) spectral range; the proportion of galaxies for which absorption-line redshifts can be obtained is significantly higher than in initial tests when only long wavelength (>5000 A) observations were possible.