Gross source counts vs. background counts (scaled to the source region) for WISE J1814+3412, WISE J2207+1939, and WISE J2357+0328 (circles, squares, and diamonds, respectively). The 1, 2, and p labels correspond to the 0.5–10 keV counts for the EPIC-MOS1, EPIC-MOS2, and EPIC-pn cameras on XMM-Newton, respectively, while the E labels correspond to merging the photons from the three EPIC cameras together. The A and B labels correspond to the 3–24 keV counts for FPMA and FPMB on NuSTAR, respectively. The dashed lines indicate Poisson no-source probabilities. Two sources are faintly detected: WISE J1814+3412 is detected with the EPIC-MOS1 and EPIC-pn cameras, and WISE J2357+0328 is detected with the EPIC-MOS2 camera.