We present the results from the Chandra ACIS CC mode observation of an anomalous X-ray pulsar ( AXP ) 1E 1841-045 .
This is the first observation in which the pulsar spectrum in wide energy range is spatially discriminated from the surrounding SNR , Kes 73 .
Like other AXPs , the phase-integrated spectrum is fitted well with power-law plus blackbody model .
The spectral parameters are \Gamma = 2.0 \pm 0.3 , kT _ { BB } = 0.44 \pm 0.02 keV , and N _ { H } = 2.54 ^ { +0.15 } _ { -0.13 } \times 10 ^ { 22 } { cm } ^ { -2 } .
This photon index is significantly flatter than the other AXPs , and resemble to soft gamma-ray repeaters ( SGRs ) in the quiescent state .
The pulse profile is double-peaked , and we found that the second peak has significantly hard spectrum .
The spectra of all phases are consistent with power-law plus blackbody model with constant temperature and photon index .
When fitted with two blackbody model , we obtained similarly good fit .
These results can be interpreted that there are two emission regions with different energy spectra .