The anomalous X-ray pulsar 4U 0142+61 was observed with Suzaku on 2007 August 15 for a net exposure of \sim 100 ks , and was detected in a 0.4 to \sim 70 keV energy band .
The intrinsic pulse period was determined as 8.68878 \pm 0.00005 s , in agreement with an extrapolation from previous measurements .
The broadband Suzaku spectra enabled a first simultaneous and accurate measurement of the soft and hard components of this object by a single satellite .
The former can be reproduced by two blackbodies , or slightly better by a resonant cyclotron scattering model .
The hard component can be approximated by a power-law of photon index \Gamma _ { h } \sim 0.9 when the soft component is represented by the resonant cyclotron scattering model , and its high-energy cutoff is constrained as > 180 keV .
Assuming an isotropic emission at a distance of 3.6 kpc , the unabsorbed 1–10 keV and 10–70 keV luminosities of the soft and hard components are calculated as 2.8 \times 10 ^ { 35 } erg s ^ { -1 } and 6.8 \times 10 ^ { 34 } erg s ^ { -1 } , respectively .
Their sum becomes \sim 10 ^ { 3 } times as large as the estimated spin-down luminosity .
On a time scale of 30 ks , the hard component exhibited evidence of variations either in its normalization or pulse shape .