  One contribution to the energy loss of hard partons propagating through a
medium as created in ultrarelativistic heavy-ion (A-A) collisions are elastic
scattering processes with medium constituents. The magnitude of this energy
loss contribution depends crucially on the effective mass of the medium
constituents - in the limit of non-recoiling static scattering centers, elastic
energy loss vanishes. Thus, it is important to constrain the amount of elastic
energy loss in order to gain information about the nature of the degrees of
freedom in the medium as resolved by a hard parton. So far, the relative
fraction of elastic (or rather incoherent) energy loss has been constrained
from above by using pathlength dependent observables. However, using the
observation that subleading gluon energy dissipation into the medium is probed
by some observables, such as hard dihadron correlations or the dijet asymmetry,
a constraint from below can also be found. In this work, this idea is worked
out within the in-medium shower evolution Monte Carlo (MC) code YaJEM-D.
