Spectral energy distributions for the first 12 stars from Table 4. We show observations from DIRECT in BVI_c (magenta diamonds), from 2MASS in J, H , K_s (red squares), from Spitzer at [3.6] and [4.5] (green triangles) and from WISE at 3.4, 4.6, 12, and 22 μm (cyan circles). An arrow indicates an upper limit in the flux. The best-fitting model (solid green line) comprises the reddened, Kurucz photospheric component (dotted black line), a hot dust or free-free emission component (dashed red line) and a cool dust component (dashed blue line). Spectral energy distributions for the remaining nine stars are shown in Appendix A.