  Recently, Carnall et al. discovered two bright high redshift quasars using
the combination of the VST ATLAS and WISE surveys. The technique involved using
the 3-D colour plane i-z:z-W1:W1-W2 with the WISE W1 (3.4 micron) and W2 (4.5
micron) bands taking the place of the usual NIR J band to help decrease stellar
dwarf contamination. Here we report on our continued search for 5.7<z<6.4
quasars over an ~2x larger area of ~3577 sq. deg. of the Southern Hemisphere.
We have found two further z>6 quasars, VST-ATLAS J158.6938-14.4211 at z=6.07
and J332.8017-32.1036 at z=6.32 with magnitudes of z_AB=19.4 and 19.7 mag
respectively. J158.6938-14.4211 was confirmed by Keck LRIS observations and
J332.8017-32.1036 was confirmed by ESO NTT EFOSC-2 observations. Here we
present VLT X-shooter Visible and NIR spectra for the four ATLAS quasars. We
have further independently rediscovered two z>5.7 quasars previously found by
the VIKING/KiDS and PanSTARRS surveys. This means that in ATLAS we have now
discovered a total of six quasars in our target 5.7<z<6.4 redshift range.
Making approximate corrections for incompleteness, we find that our quasar
space density agrees with the SDSS results of Jiang et al. at M_1450A~-27mag.
Preliminary virial mass estimates based on the CIV and MIII emission lines give
black hole masses in the range M_BH~1-6x10e9 M_solar for the four ATLAS
quasars.
