  We report a detection of thermal emission from the hot Jupiter WASP-48b in
the $K_{\rm s}$-band. We used the Wide-field Infra-red Camera on the 3.6-m
Canada-France Hawaii Telescope to observe an occultation of the planet by its
host star. From the resulting occultation lightcurve we find a planet-to-star
contrast ratio in the Ks-band of $0.136 \pm 0.014\,\%$ , in agreement with the
value of $0.109 \pm 0.027\,\%$ previously determined. We fit the two Ks-band
occultation lightcurves simultaneously with occultation lightcurves in the
$H$-band and the Spitzer 3.6-{\mu}m and 4.5-{\mu}m bandpasses, radial velocity
data, and transit lightcurves. From this, we revise the system parameters and
construct the spectral energy distribution (SED) of the dayside atmosphere. By
comparing the SED with atmospheric models, we find that both models with and
without a thermal inversion are consistent with the data. We find the planet's
orbit to be consistent with circular ($e < 0.072$ at 3$\sigma$).
