We observed the compact central object CXOU J085201.4–461753 in the supernova remnant G266.2–1.2 ( RX J0852.0–4622 ) with the Chandra ACIS detector in timing mode .
The spectrum of this object can be described by a blackbody model with the temperature kT = 404 \pm 5 eV and radius of the emitting region R = 0.28 \pm 0.01 km , at a distance of 1 kpc .
Power-law and thermal plasma models do not fit the source spectrum .
The spectrum shows a marginally significant feature at 1.68 keV .
Search for periodicity yields two candidate periods , about 301 ms and 33 ms , both significant at a 2.1 \sigma level ; the corresponding pulsed fractions are 13 % and 9 % , respectively .
We find no evidence for long-term variability of the source flux , nor do we find extended emission around the central object .
We suggest that CXOU J085201.4–461753 is similar to CXOU J232327.9+584842 , the central source of the supernova remnant Cas A .
It could be either a neutron star with a low or regular magnetic field , slowly accreting from a fossil disk , or , more likely , an isolated neutron star with a superstrong magnetic field .
In either case , a conservative upper limit on surface temperature of a 10 km radius neutron star is about 90 eV , which suggests accelerated cooling for a reasonable age of a few thousand years .