NIR AB magnitudes for the 1.0 × 10⁵ ﹩{M}_{\odot }﹩ DCBH at birth as it would appear at z = 8–20 in JWST, Euclid, and WFIRST. Top left: JWST NIRCam bands. The horizontal dashed lines are 5σ AB magnitude detection limits for 100 hour exposures in the filters of corresponding color (2.50 μm: 31.4 mag, 3.56 μm: 31.5 mag, 4.44 μm: 31.0 mag, and 4.60 μm: 29.8 mag). Top right: JWST MIRI bands. The horizontal dashed lines are 5σ AB magnitude detection limits for 100 hr exposures in the filters of corresponding color (5.6 μm: 28.0 mag, 7.7 μm: 27.6 mag, 10.0 μm: 27.0 mag, 15.0 μm: 26.1 mag, and 18.0 μm: 24.7 mag). Bottom left: Euclid. Bottom right: WFIRST. The horizontal dashed lines in the bottom panels are detection limits for deep-drilling fields in Euclid and WFIRST (26 mag and 28 mag, respectively).