Optical-to-MIR SED of J1813 (open diamonds) from Pan-STARRS1 (teal), UKIDSS (green), and Spitzer (red). The curves represent the best-fit models, an absorbed black body (solid blue line) and three absorbed stellar models from the Kurucz (1993) template library: a B0I model (dotted purple line), B0V model (dashed magenta line), and a B0III model (dot-dashed pink line). The residual (observed minus predicted) fluxes are shown with a small horizontal shift for clarity in the bottom panel (black body: blue circles; B0I: purple diamonds; B0V: magenta triangles; B0III: pink squares). All three models assume an A_V = 38 mag.