– 31 – 10 12 14 16 18 20 0 0.2 0.4 0.6 0.8 1 Fig. 10.— Detection completeness for variable AGNs as a function of magnitude for sources with high correlation r > 0 . 8 and either σ$_{12}$ > 2 or 4 (Variability Level 2 or 4). We show the completeness for the current four epoch SDWFS survey, for the current survey plus one epoch in 2011 March (five epochs), and for the current survey plus two epochs in 2011 and 2012 March (six epochs).