  We study bottomonium spectral functions in the quark-gluon plasma in the
Upsilon and eta_b channels, using lattice QCD simulations with two flavours of
light quark on highly anisotropic lattices. The bottom quark is treated with
nonrelativistic QCD (NRQCD). In the temperature range we consider, 0.42 < T/T_c
< 2.09, we find that the ground states survive, whereas the excited states are
suppressed as the temperature is increased. The position and width of the
ground states are compared to analytical effective field theory (EFT)
predictions. Systematic uncertainties of the maximum entropy method (MEM), used
to construct the spectral functions, are discussed in some detail.
