We present a timing and spectral analysis of the X-ray pulsar XTE J1946 + 274 observed with Suzaku during an outburst decline in 2010 October and compare with previous results .
XTE J1946 + 274 is a transient X-ray binary consisting of a Be-type star and a neutron star with a 15.75 s pulse period in a 172 d orbit with 2–3 outbursts per orbit during phases of activity .
We improve the orbital solution using data from multiple instruments .
The X-ray spectrum can be described by an absorbed Fermi-Dirac cutoff power law model along with a narrow Fe K \alpha line at 6.4 keV and a weak Cyclotron Resonance Scattering Feature ( CRSF ) at \sim 35 keV .
The Suzaku data are consistent with the previously observed continuum flux versus iron line flux correlation expected from fluorescence emission along the line of sight .
However , the observed iron line flux is slightly higher , indicating the possibility of a higher iron abundance or the presence of non-uniform material .
We argue that the source most likely has only been observed in the subcritical ( non-radiation dominated ) state since its pulse profile is stable over all observed luminosities and the energy of the CRSF is approximately the same at the highest ( \sim 5 \times 10 ^ { 37 } erg s ^ { -1 } ) and lowest ( \sim 5 \times 10 ^ { 36 } erg s ^ { -1 } ) observed 3–60 keV luminosities .