  The discovery of Epsilon Indi Ba and Bb, a nearby binary brown dwarf system
with a main-sequence companion, allows a concerted campaign to characterise the
physical parameters of two T dwarfs providing benchmarks against which
atmospheric and evolutionary models can be tested. Some recent observations
suggest the models at low mass and intermediate age may not reflect reality
with, however, few conclusive tests.
  We are carrying out a comprehensive characterisation of these, the nearest
known brown dwarfs, to allow constraints to be placed upon models of cool field
dwarfs. We present broadband photometry from the V- to M-band and the
individual spectrum of both components from 0.6-5.1 microns at a resolution of
up to R=5000. A custom analytic profile fitting routine was implemented to
extract the blended spectra and photometry of both components separated by 0.7
arcsec. We confirm the spectral types to be T1 and T6, and notably, we do not
detect lithium at 6708A in the more massive object which may be indicative both
of the age of the system and the mass of the components.
