  WISE J104915.57-531906.1 is the nearest brown dwarf binary to our Solar
system, consisting of two brown dwarfs in the L/T transition: Luhman 16A & B.
In this paper we present the first map of Luhman 16A, and maps of Luhman 16B
for two epochs. Our maps were created by applying Aeolus, a Markov-Chain Monte
Carlo code that maps the top-of-the-atmosphere structure of brown dwarf and
other ultracool atmospheres, to light curves of Luhman 16A & B using the Hubble
Space Telescope's G141 and G102 grisms. Aeolus retrieved three or four spots in
the top-of-the-atmosphere of Luhman 16A & B, with a surface coverage of 19%-32%
(depending on an assumed rotational period of 5 hr or 8 hr) or 21%-38.5%
(depending on the observational epoch) respectively. The brightness temperature
of the spots of the best-fit models was ~200 K hotter than the background
top-of-the-atmosphere. We compared our Luhman 16B map with the only previously
published map. Interestingly, our map contained a large, cooler (DT~51 K) than
the background top-of-the-atmosphere spot that lay at low latitudes, in
agreement with the previous Luhman 16B map. Finally, we report the detection of
a feature reappearing in Luhman 16B light curves that are separated by tens of
hundreds of rotations from each other. We speculate this feature is related to
top-of-the-atmosphere structures of Luhman 16B.
