Mean number of observable BH-LCs as a function of limiting G magnitude computed from 500 Galactic realizations. Shades show ﹩3\sigma ﹩ regions above and below the mean denoted by the lines. Dashed (solid) lines denote our estimates using pessimistic (optimistic) astrometric cuts (Section 2.4). Blue, red, and black shading denote Zero-kick, FB-kick, and NS-kick models, respectively.