Rest-frame X-ray luminosity against rest-frame 6 μm luminosity for: (left) 2–10 keV luminosities calculated using XMM-Newton data; and (right) 10–40 keV luminosities calculated using NuSTAR data. The X-ray luminosities are not corrected for absorption, and upper limits correspond to 3σ values to aid literature comparisons. WISE J1814+3412, WISE J2207+1939, and WISE J2357+0328 are shown as black, blue, and red circles, as indicated. We compare with NuSTAR observations from the serendipitous survey (Alexander et al. 2013; triangles), a survey of three SDSS type-2 quasars at z ~ 0.5 (Lansbury et al. 2014; diamonds), and an interesting source at z ≈ 2 detected by NuSTAR in the ECDFS (Del Moro et al. 2014; star); in the left panel, we also show soft X-ray data on Compton-thick quasars from Alexander et al. (2008; squares). We compare with three published intrinsic relations for the 2–10 keV band calibrated using various AGN samples, as indicated. The relations are extrapolated to the 10–40 keV band assuming Γ = 1.8 and in both panels the dashed lines show the result of obscuration by N_H = 10²⁴ cm⁻². Assuming the low X-ray luminosities are due to absorption, sources that lie below the N_H = 10²⁴ cm⁻² tracks may be Compton-thick.