  We report new detections of thermal emission from the transiting hot Jupiter
WASP-43b in the H and Ks-bands as observed at secondary eclipses. The
observations were made with the WIRCam instrument on the CFHT. We obtained a
secondary eclipse depth of 0.103$_{-0.017}^{+0.017}%$ and
0.194$_{-0.029}^{+0.029}%$ in the H and Ks-bands, respectively. The Ks band
depth is consistent with previous measurement in the narrow band centered at
2.09um by Gillon et al. (2012). Our eclipse depths in both bands are consistent
with a blackbody spectrum with a temperature of ~1850 K, slightly higher than
the dayside equilibrium temperature without day-night energy redistribution.
Based on theoretical models of the dayside atmosphere of WASP-43b, our data
constrain the day-night energy redistribution in the planet to be $\lesssim
15-25$%, depending on the metal content in the atmosphere. Combined with energy
balance arguments our data suggest that a strong temperature inversion is
unlikely in the dayside atmosphere of WASP-43b. However, a weak inversion
cannot be strictly ruled out at the current time. Future observations are
required to place detailed constraints on the chemical composition of the
atmosphere.
