Context : We present the results of Suzaku observations of a massive galaxy cluster A2744 , which is an active merger at z = 0.308 .

Aims : By using long X-ray observations of A2744 , we aim to understand the growth of the cluster and the gas heating process through mass accretion along the surrounding filaments .

Methods : We analyzed data from two-pointed Suzaku observations of A2744 to derive the temperature distribution out to the virial radius in three different directions .
We also performed a deprojection analysis to study radial profiles of gas temperature , density , and entropy and compared the X-ray results with multi-wavelength data to investigate correlations with the surface density of galaxies and with radio relics .

Results : The gas temperature was measured out to the virial radius r _ { 200 } in the north-east region and to about 1.5 r _ { 200 } in the north-west and south regions .
The radial profile of the gas temperature is rather flat and the temperature is very high ( even near r _ { 200 } ) ; it is comparable to the mean temperature of this cluster ( kT = 9 keV ) .
These characteristics have not been reported in any other cluster .
We find a hint of temperature jump in the northeast region whose location coincides with a large radio relic , indicating that the cluster experienced gas heating because of merger or mass accretion onto the main cluster .
The temperature distribution is anisotropic and shows no clear positive correlation with the galaxy density , which suggests an inhomogeneous mass structure and a complex merger history in A2744 .

Conclusions :