  The detection of optical/infrared counterparts to Anomalous X-ray Pulsars
(AXPs) has greatly increased our understanding of these systems. Models for the
AXP phenomenon were based upon their X-ray emission, and all but the magnetar
model made predictions for the optical/infrared that have now been falsified.
  With detections in hand, detailed studies of the optical/infrared to X-ray
flux ratios, variability, and the spectral energy distributions have become
possible. We present new data on two AXPs taken with Keck and Magellan, and
compare the results with predictions made in the context of the magnetar model,
in which the emission is due to ion currents flowing in the >10e14 G
magnetosphere of young neutron stars.
