We searched for hard X-ray (20–300 keV) emission from nine central compact
objects (CCOs) 1E 1207.4−5209, 1WGA J1713−3949, J082157.5−430017,
J085201.4−461753, J1601−5133, J1613483−5055, J181852.0−150213,
J185238.6+004020, and J232327.9+584843 with the INTEGRAL observatory.
We applied spectral imaging analysis and did not detect any of the sources
with luminosity upper limits in the range of 1033-1034 ergs/s in the 20-75 keV
band. For nearby CCOs (< 4 kpc) the upper limit luminosities are an order
of magnitude lower than the measured persistent hard X-ray luminosities of
AXPs. This may indicate that the central compact objects are low magnetic
field systems with fallback disks around them