Summary of FC detection limits through F1042M for the range of apparent brightnesses spanned by the stars in our search. The curves are labeled with m₁₀₄₂ of the target stars for which the detection limits were measured. These stars are, from top to bottom, Gl 244A (Sirius), Gl 559B (α Centauri B), Gl 71 (τ Ceti), Gl 411 (Lalande 21185), Gl 729 (Ross 154), and Gl 406 (Wolf 359). The values of m₁₀₄₂ for Gl 411 and Gl 729 were obtained directly from unsaturated images of those stars. The values of m₁₀₄₂ for the remaining stars were estimated from ratios of the azimuthally averaged PSFs of these stars and other unsaturated stars. The dashed horizontal lines represent the apparent magnitudes of Gl 229B projected to distances of 1, 3, 5, and 10 pc.